Quiz - biology - Cell : The unit of life -Recommended MCQ

Q1. The cell membrane is primarily composed of: Source: orcusprep.in

Recommended MCQ

easy

Proteins and cellulose

Proteins and phospholipids

Proteins and carbohydrates

Proteins, phospholipids and some carbohydrates

Q2. Carbohydrate components are found in the plasmalemma (cell membrane) mainly in the form of: Source: orcusprep.in

Recommended MCQ

easy

Hemicellulose

Cellulose

Starch

Glycoprotein

Q3. The carbohydrates found on the exterior surface of the cell membrane are essential for which function? Source: orcusprep.in

Recommended MCQ

medium

Transport of substance

Cell recognition

Attachment to microfilament

Attachment to microtubules

Q4. The fluid nature of the plasma membrane is primarily attributed to the presence of: Source: orcusprep.in

Recommended MCQ

easy

Carbohydrates

Lipid

Glycoprotein

Polysaccharide

Q5. What is the most abundant chemical substance found in the middle lamella of plant cells? Source: orcusprep.in

Recommended MCQ

easy

Cutin

Chitin

Lignin

Pectin

Q6. Which cell structure is capable of growth and becomes less prominent as a plant cell matures? Source: orcusprep.in

Recommended MCQ

medium

Primary cell wall

Secondary cell wall

Middle lamella

Cell membrane

Q7. The fluidity of the cell membrane is crucial for which cellular processes? Source: orcusprep.in

Recommended MCQ

medium

Cell growth

Cell division

Endocytosis

All the above

Q8. The plasma membrane's function is best described as: Source: orcusprep.in

Recommended MCQ

easy

Selectively permeable

Permeable

Impermeable

Semipermeable

Q9. How does the Fluid Mosaic Model (Singer and Nicolson) differ from the Unit Membrane Model (Robertson) in its description of the plasma membrane? Source: orcusprep.in

Recommended MCQ

medium

Number of lipid layers

Arrangement of proteins

Arrangement of lipid layers

Absence of proteins

Q10. The process by which a cell engulfs large molecules, particles, or other cells is known as: Source: orcusprep.in

Recommended MCQ

easy

Diffusion

Osmosis

Exocytosis

Endocytosis

Q11. According to the Fluid Mosaic Model of the plasma membrane, which statement is true? Source: orcusprep.in

Recommended MCQ

medium

Upper layer is non-polar and hydrophilic

Polar layer is hydrophobic

Phospholipids form a bimolecular layer in middle part

Proteins form a middle layer

Q12. The primary lipid components that form the backbone of the plant cell membrane are: Source: orcusprep.in

Recommended MCQ

easy

Phosphodiester

Glycocalyx

Peptidoglycan

Phosphoglyceride

Q13. The primary function of the rough endoplasmic reticulum (RER) is: Source: orcusprep.in

Recommended MCQ

easy

Protein synthesis

Cell wall formation

Lipid synthesis

Cholesterol synthesis

Q14. Mitochondrial DNA (mtDNA) has which of the following characteristics? Source: orcusprep.in

Recommended MCQ

easy

Naked

Circular

Double stranded

All the above

Q15. The Golgi apparatus is believed to originate from which other cell organelle? Source: orcusprep.in

Recommended MCQ

medium

Endoplasmic Reticulum (E.R.)

Mitochondria

Nucleus

Proplastid

Q16. Which cell organelle is the primary site for the synthesis of steroids and lipids? Source: orcusprep.in

Recommended MCQ

easy

Endoplasmic Reticulum (E.R.)

Golgibody

Peroxisomes

Lysosomes

Q17. Which cell organelle helps to provide mechanical support and shape to a cell? Source: orcusprep.in

Recommended MCQ

medium

Golgi complex

Centrioles

Lysosomes

E.R.

Q18. Which cell organelle is rich in hydrolytic enzymes and is responsible for intracellular digestion? Source: orcusprep.in

Recommended MCQ

easy

Ribosome

Lysosome

Golgi body

Endoplasmic reticulum

Q19. The smooth endoplasmic reticulum (SER) is predominantly composed of: Source: orcusprep.in

Recommended MCQ

easy

Cisternae

Tubules

Vesicle

All the above

Q20. The extensive network of membranes known as a "system of membranes" refers to which organelle? Source: orcusprep.in

Recommended MCQ

easy

Lysosome

Endoplasmic Reticulum (E.R.)

Mitochondria

Chloroplast

Q21. Ribophorins, which are proteins that attach ribosomes, are found on the surface of which organelle? Source: orcusprep.in

Recommended MCQ

medium

Rough E.R.

Smooth E.R.

Golgi body

Lysosome

Q22. The hydrolytic enzymes within lysosomes are most active at what pH level? Source: orcusprep.in

Recommended MCQ

easy

pH – 5

pH – 7

pH – 8

pH – 10

Q23. The primary function of the Golgi complex is: Source: orcusprep.in

Recommended MCQ

easy

Fermentation

Phosphorylation

Respiration

Packaging of materials for secretion

Q24. The formation of lysosomes involves the coordinated action of which two organelles? Source: orcusprep.in

Recommended MCQ

medium

Endoplasmic reticulum

Golgi bodies

Both 1 and 2

Mitochondria

Q25. Which of the following organelles is enclosed by a single unit membrane? Source: orcusprep.in

Recommended MCQ

easy

Ribosome

Mitochondria

Chloroplast

Lysosome

Q26. The flattened, interconnected sacs known as cisternae are a characteristic structural feature of: Source: orcusprep.in

Recommended MCQ

easy

Only in mitochondria

Only in Endoplasmic Reticulum

In Endoplasmic Reticulum and Golgi body

Only in Golgi body

Q27. The primary site of lipid synthesis within a eukaryotic cell is the: Source: orcusprep.in

Recommended MCQ

easy

Rough ER

Smooth ER

Golgi bodies

Ribosome

Q28. The detoxification of lipid-soluble drugs and other harmful compounds in the endoplasmic reticulum is primarily performed by which enzyme? Source: orcusprep.in

Recommended MCQ

medium

Cytochrome P450

Cytochrome bf

Cytochrome c

Cytochrome a₁–a₃

Q29. Where in a plant cell is the pigment anthocyanin, which provides red, purple, and blue colors, typically found? Source: orcusprep.in

Recommended MCQ

easy

Chromoplasts

Amyloplasts

Cytoplasm

Cell sap

Q30. The Golgi complex is primarily involved in which cellular process? Source: orcusprep.in

Recommended MCQ

easy

Respiration

Secretion

Excretion

Digestion

Q31. The organelle commonly referred to as the "powerhouse of the cell" is: Source: orcusprep.in

Recommended MCQ

easy

Nucleus

DNA

Mitochondria

ATP

Q32. Which of the following pairs of organelles contain their own genetic material (DNA)? Source: orcusprep.in

Recommended MCQ

medium

Mitochondria, peroxisome

Plasma membrane, ribosome

Mitochondria, chloroplast

Chloroplast, dictyosome

Q33. Which of the following is considered a semi-autonomous cell organelle? Source: orcusprep.in

Recommended MCQ

easy

Mitochondria

Ribosome

Golgi body

Peroxisome

Q34. During photosynthesis, which cell organelle is responsible for the release of oxygen? Source: orcusprep.in

Recommended MCQ

easy

Mitochondria

Golgi–body

Chloroplast

Ribosome

Q35. Which cell organelle is characterized by an abundance of oxidizing enzymes for cellular respiration? Source: orcusprep.in

Recommended MCQ

medium

Golgi body

Endoplasmic reticulum

Centrioles

Mitochondria

Q36. The process of aerobic respiration, which generates a large amount of ATP, is carried out in which organelle? Source: orcusprep.in

Recommended MCQ

easy

Mitochondria

Chloroplast

Ribosome

Golgibody

Q37. What is the name of the ground substance or fluid-filled space within the inner membrane of a mitochondrion? Source: orcusprep.in

Recommended MCQ

easy

Stroma

Matrix

Cell sap

Cytoplasm

Q38. Which organelles are known as the "ATP factories" of the cell? Source: orcusprep.in

Recommended MCQ

easy

Chloroplast

Mitochondria

Ribosome

Nucleus

Q39. The infoldings of the inner mitochondrial membrane are known as: Source: orcusprep.in

Recommended MCQ

easy

Surface of grana

Surface of plasma membrane.

Membrane of Mitochondria

Nuclear Membrane

Q40. Among the options, which organelle is enclosed by a double membrane? Source: orcusprep.in

Recommended MCQ

easy

Ribosomes

Mitochondria

Lysosomes

Centrioles

Q41. Within a chloroplast, the chlorophyll pigment is located in: Source: orcusprep.in

Recommended MCQ

easy

Grana

Only in stroma thylakoids

Stroma

Both grana and stroma

Q42. Elaioplasts, which are plastids that store oils and fats, are not found in: Source: orcusprep.in

Recommended MCQ

medium

Potato

Cocos nucifera (Coconut)

Arachis hypogea (Ground nut)

Helianthus annuus (Sunflower)

Q43. What is the typical shape of chloroplasts in higher plants? Source: orcusprep.in

Recommended MCQ

easy

Discoidal or oval

Spiral

Cup shaped

Reticulate

Q44. The detoxification of lipid-soluble drugs and other harmful compounds in the endoplasmic reticulum is primarily performed by which enzyme? Source: orcusprep.in

Recommended MCQ

medium

Cytochrome P450

Cytochrome bf

Cytochrome c

Cytochrome a₁–a₃

Q45. Where in a plant cell is the pigment anthocyanin, which provides red, purple, and blue colors, typically found? Source: orcusprep.in

Recommended MCQ

easy

Chromoplasts

Amyloplasts

Cytoplasm

Cell sap

Q46. The Golgi complex is primarily involved in which cellular process? Source: orcusprep.in

Recommended MCQ

easy

Respiration

Secretion

Excretion

Digestion

Q47. The organelle commonly referred to as the "powerhouse of the cell" is: Source: orcusprep.in

Recommended MCQ

easy

Nucleus

DNA

Mitochondria

ATP

Q48. Which of the following pairs of organelles contain their own genetic material (DNA)? Source: orcusprep.in

Recommended MCQ

medium

Mitochondria, peroxisome

Plasma membrane, ribosome

Mitochondria, chloroplast

Chloroplast, dictyosome

Q49. Which of the following is considered a semi-autonomous cell organelle? Source: orcusprep.in

Recommended MCQ

easy

Mitochondria

Ribosome

Golgi body

Peroxisome

Q50. During photosynthesis, which cell organelle is responsible for the release of oxygen? Source: orcusprep.in

Recommended MCQ

easy

Mitochondria

Golgi–body

Chloroplast

Ribosome

Q51. Which cell organelle is characterized by an abundance of oxidizing enzymes for cellular respiration? Source: orcusprep.in

Recommended MCQ

medium

Golgi body

Endoplasmic reticulum

Centrioles

Mitochondria

Q52. The process of aerobic respiration, which generates a large amount of ATP, is carried out in which organelle? Source: orcusprep.in

Recommended MCQ

easy

Mitochondria

Chloroplast

Ribosome

Golgibody

Q53. What is the name of the ground substance or fluid-filled space within the inner membrane of a mitochondrion? Source: orcusprep.in

Recommended MCQ

easy

Stroma

Matrix

Cell sap

Cytoplasm

Q54. Which organelles are known as the "ATP factories" of the cell? Source: orcusprep.in

Recommended MCQ

easy

Chloroplast

Mitochondria

Ribosome

Nucleus

Q55. The infoldings of the inner mitochondrial membrane are known as: Source: orcusprep.in

Recommended MCQ

easy

Surface of grana

Surface of plasma membrane.

Membrane of Mitochondria

Nuclear Membrane

Q56. Among the options, which organelle is enclosed by a double membrane? Source: orcusprep.in

Recommended MCQ

easy

Ribosomes

Mitochondria

Lysosomes

Centrioles

Q57. Within a chloroplast, the chlorophyll pigment is located in: Source: orcusprep.in

Recommended MCQ

easy

Grana

Only in stroma thylakoids

Stroma

Both grana and stroma

Q58. Elaioplasts, which are plastids that store oils and fats, are not found in: Source: orcusprep.in

Recommended MCQ

medium

Potato

Cocos nucifera (Coconut)

Arachis hypogea (Ground nut)

Helianthus annuus (Sunflower)

Q59. What is the typical shape of chloroplasts in higher plants? Source: orcusprep.in

Recommended MCQ

easy

Discoidal or oval

Spiral

Cup shaped

Reticulate

Q60. Mitochondria and chloroplasts are considered to be endosymbionts of cells primarily because they: Source: orcusprep.in

Recommended MCQ

medium

Possess their own nucleic acid

Have capacity of ATP synthesis

Do not reproduce

All the above

Q61. What is the name of the non-pigmented, fluid-filled space within a chloroplast? Source: orcusprep.in

Recommended MCQ

easy

Thylakoids

Grana

Stroma

Lamellae

Q62. Which of the following characteristics is NOT shared by both chloroplasts and mitochondria? Source: orcusprep.in

Recommended MCQ

medium

Both are present in animal cells

Both contain their own genetic material

Both are present in eukaryotic cells

Both are present in plant cells

Q63. During the germination of fatty seeds, which specialized peroxisome converts stored fatty acids into carbohydrates? Source: orcusprep.in

Recommended MCQ

hard

Peroxisome

Glyoxysome

Golgi body

Lysosome

Q64. In a typical eukaryotic cell, DNA is NOT found in which of the following organelles? Source: orcusprep.in

Recommended MCQ

easy

Nucleus

Mitochondria

Chloroplast

Ribosome

Q65. Among the following organelles, which one is NOT capable of self-duplication? Source: orcusprep.in

Recommended MCQ

medium

Mitochondria

Centrioles

Chloroplast

Ribosome

Q66. The protein tubulin is a key component of microtubules. In which of the following structures is tubulin protein NOT found? Source: orcusprep.in

Recommended MCQ

easy

Plasma membrane

Cilia

Flagella

Microtubules

Q67. Peroxisomes are organelles associated with which of the following metabolic processes? Source: orcusprep.in

Recommended MCQ

medium

Krebs cycle

Degradation of H₂O

Anaerobic respiration

Photorespiration and degradation of H₂O₂

Q68. Which of the following are considered to be specialized types of peroxisomes, primarily found in plant cells? Source: orcusprep.in

Recommended MCQ

easy

Glyoxysomes

Mitochondria

Golgibody

Lysosomes

Q69. The term "Palade particles" is an older name for which cellular structures? Source: orcusprep.in

Recommended MCQ

easy

Ribosomes

Golgi vesicles

Lysosomes

Peroxisomes

Q70. What is a polysome, or polyribosome? Source: orcusprep.in

Recommended MCQ

easy

A chain of pinosomes

A chain of phagosomes

A chain of microsomes

A chain of ribosomes

Q71. The basal body of a cilium or flagellum has a structure similar to that of a: Source: orcusprep.in

Recommended MCQ

easy

Centriole like

Plastid like

Ribosome like

Mitochondria like

Q72. In the designation of a prokaryotic ribosome as 70S, what does the "S" stand for? Source: orcusprep.in

Recommended MCQ

easy

Svedberg unit

Smallest unit

Smooth

Speed

Q73. The primary protein that makes up microtubules is: Source: orcusprep.in

Recommended MCQ

easy

Actin protein

Myosin protein

Tubulin protein

Dynein protein

Q74. What is the characteristic arrangement of microtubules in a centriole? Source: orcusprep.in

Recommended MCQ

easy

9 + 2

2 + 9

11 + 0

9 + 0

Q75. Which of the following is considered to be the smallest organelle within a cell? Source: orcusprep.in

Recommended MCQ

easy

Lysosome

Centrosome

Ribosome

Golgibody

Q76. 70S ribosomes are characteristic of which types of cells and organelles? Source: orcusprep.in

Recommended MCQ

easy

Prokaryotic cells

Prokaryotic cells, chloroplasts and mitochondria

Mitochondria

Nucleus, mitochondria

Q77. Ribosomes are macromolecular complexes composed of: Source: orcusprep.in

Recommended MCQ

easy

DNA + Protein

RNA + Protein

DNA + RNA

Only protein

Q78. Which of the following statements is true for both cilia and flagella? Source: orcusprep.in

Recommended MCQ

medium

have 9 + 2 arrangement of microtubules

are protective structure of cells

are only present in protozoa animals

are outgrowth structures of cytoplasm

Q79. In which part of a plant would you most likely find glyoxysomes, an organelle that converts lipids to carbohydrates? Source: orcusprep.in

Recommended MCQ

hard

Endosperm of wheat

Endosperm of castor

Palisade cells in leaf

Root hairs

Q80. A cell's genome is best defined as: Source: orcusprep.in

Recommended MCQ

easy

Part of a chromosome

Half of a chromosome

Total DNA in a cell

Total chromosomes in a gamete

Q81. The nucleolar organizer region (NOR) of a chromosome is a: Source: orcusprep.in

Recommended MCQ

medium

Primary constriction

Secondary constriction

Tertiary constriction

Centriole

Q82. The kinetochore, a protein structure that serves as an attachment site for spindle fibers, is located on the: Source: orcusprep.in

Recommended MCQ

easy

Mitochondria

Peroxisome

Chromosome

Flagella

Q83. Eukaryotic chromosomes are complex structures primarily composed of: Source: orcusprep.in

Recommended MCQ

easy

DNA, RNA, Histones, Non-histones

DNA and Histones

DNA and RNA

DNA, RNA and Histones

Q84. Which specific part of a chromosome is associated with the aging of an organism and cellular senescence? Source: orcusprep.in

Recommended MCQ

medium

Centromere

Telomere

Kinetochore

Satellite

Q85. The specialized, non-sticky ends of chromosomes are known as: Source: orcusprep.in

Recommended MCQ

easy

Chromatids

Centromeres

Satellites

Telomeres

Q86. The protein nucleoplasmin is involved in the assembly of chromatin and is located in the: Source: orcusprep.in

Recommended MCQ

medium

Nuclear pore

Sieve cells

Nucleolus

Heterochromatin

Q87. The polytene chromosomes found in the salivary glands of certain insects are concerned with which biological process? Source: orcusprep.in

Recommended MCQ

medium

vitellogenesis

formation of ribosomes

lipid systhesis

metamorphosis in some insects

Q88. What is the small fragment of a chromosome called that appears distal to the secondary constriction? Source: orcusprep.in

Recommended MCQ

easy

Centromere

Telomere

Satellite

Nucleolar organiser

Q89. If a chromosome has a centromere located close to one end, resulting in one very short arm and one very long arm, it is classified as: Source: orcusprep.in

Recommended MCQ

easy

Metacentric

Submetacentric

Acrocentric

Telocentric

Q90. Heterochromatin, a type of chromatin, is best described as: Source: orcusprep.in

Recommended MCQ

easy

Darkly stained part of chromatin

Lightly stained part of cristae

Lightly stained part of grana

Scattered lobes in cytoplasm

Q91. A chromosome with a centromere located at its very tip, giving it a single arm, is called a: Source: orcusprep.in

Recommended MCQ

easy

Metacentric

Submetacentric

Telocentric

Acrocentric

Q92. In which of the following plant cells is the nucleus typically absent at maturity? Source: orcusprep.in

Recommended MCQ

medium

Cell of vascular cambium

Root hair cell

Companion cell

Members of mature sieve tube

Q93. The protective telomeres at the ends of eukaryotic chromosomes are composed of short, repetitive sequences rich in which nitrogenous base? Source: orcusprep.in

Recommended MCQ

medium

Cytosine rich repeats

Adenine rich repeats

Guanine rich repeats

Thymine rich repeats

Q94. In an animal cell, protein synthesis takes place on ribosomes located in which parts of the cell? Source: orcusprep.in

Recommended MCQ

easy

On ribosomes present in cytoplasm as well as in mitochondria

On ribosomes present in the nucleolus as well as in cytoplasm

Only on ribosomes attached to the nuclear envelope and endoplasmic reticulum

Only on the ribosomes present in cytosol

Q95. Which of the following statements about the contractile vacuole is correct? Source: orcusprep.in

Recommended MCQ

medium

is a membrane less structure

is formed by engulfing the food

is important for osmoregulation

is called suicidal bag of cell

Q96. In a mitochondrion, the two aqueous compartments are the intermembrane space and the matrix. Which labels from a typical diagram would represent these? Source: orcusprep.in

Recommended MCQ

easy

Intermembrane space, Outer membrane

Matrix, Intermembrane space

Outer membrane, Matrix

Inner membrane, Matrix

Q97. What is the typical average diameter or width of a mitochondrion? Source: orcusprep.in

Recommended MCQ

easy

0.2 µm

0.5 µm

1.0 µm

4.1 µm

Q98. The cristae of the mitochondrion are the infoldings of which membrane, and they are present towards which compartment? Source: orcusprep.in

Recommended MCQ

easy

Outer membrane, Intermembrane space

Inner membrane, Intermembrane space

Outer membrane, Matrix

Inner membrane, Matrix

Q99. In a mitochondrion, a single, circular DNA molecule is found in which compartment? Source: orcusprep.in

Recommended MCQ

easy

Outer membrane

Matrix

Intermembrane space

Cristae

Q100. The mitochondrial matrix contains which of the following components?
(i) few RNA molecules
(ii) 70s ribosomes
(iii) Enzymes
(iv) Circular DNA Source: orcusprep.in

Recommended MCQ

medium

ii, iv

i, ii, iv

ii, iii, iv

i, ii, iii, iv

Q101. The following statements describe which cell organelle?
(a) It is a granular structure.
(b) It was first observed as dense particles by George Palade.
(c) It is composed of RNA and proteins.
(d) It is not surrounded by any membrane. Source: orcusprep.in

Recommended MCQ

easy

Nucleolus

Ribosome

Lysosome

Chloroplast

Q102. Which of the following statements about the centrosome and centrioles is INCORRECT? Source: orcusprep.in

Recommended MCQ

medium

Centrosome is surrounded by amorphous pericentriolar material.

In centrosome, both centrioles lie parallel to each other in which each has an organisation like the cartwheel.

Centrioles are made up of nine unevenly spaced peripheral fibrils of tubulin.

Hub is the central proteinaceous part of centriole.

Q103. Who were the two scientists who, in the development of cell theory, concluded that all plant and animal tissues, respectively, are composed of cells? Source: orcusprep.in

Recommended MCQ

easy

Rudolf Virchow and Robert Brown respectively

Mathias Schleiden and Theodore Schwann respectively

Theodore Schwann and Mathias Schleiden respectively

Robert Hooke and Schleiden respectively

Q104. According to the Fluid Mosaic Model, the quasi-fluid nature of the ________ enables the lateral movement of ________ within the overall bilayer. This ability to move is measured as its ________.
(i) Carbohydrates
(ii) Lipids
(iii) Proteins
(iv) Fluidity
(v) Selective permeability Source: orcusprep.in

Recommended MCQ

hard

ii, iii, iv

iii, i, iv

iii, ii, v

i, ii, iv

Q105. One of the most critical and defining functions of the plasma membrane is: Source: orcusprep.in

Recommended MCQ

easy

Formation of nuclear membrane

Transport of molecules across it

Exocytosis

Detoxification

Q106. Which type of molecules cannot freely pass through the lipid bilayer and require a carrier protein to facilitate their transport? Source: orcusprep.in

Recommended MCQ

medium

Nonpolar molecules

Polar molecules

Hydrophobic molecules

Both (2) and (3)

Q107. The Na⁺/K⁺ pump, which moves ions against their concentration gradient, is an example of: Source: orcusprep.in

Recommended MCQ

easy

Passive transport

Osmosis

Active transport

Simple diffusion

Q108. Which of the following pairings of a molecule type and its transport mechanism across the membrane is INCORRECT? Source: orcusprep.in

Recommended MCQ

medium

Neutral solute – simple diffusion

Water – osmosis

Non polar molecules – facilitate diffusion

ATP utilized – active transport

Q109. Which of the following statements about mitochondria are correct?
(a) are easily visible under the microscope (without specifically stained)
(b) are typically sausage-shaped or cylindrical
(c) are double membrane bound structures
(d) have two aqueous compartments Source: orcusprep.in

Recommended MCQ

medium

a, d correct and b, c incorrect

a, b correct and c,d incorrect

a incorrect and b, c, d correct

a, d incorrect and b, c correct

Q110. The inner mitochondrial membrane forms infoldings called: Source: orcusprep.in

Recommended MCQ

easy

Thylakoid

Cisternae

Oxysomes

Cristae

Q111. The number of mitochondria within a cell is highly variable and depends on the cell's: Source: orcusprep.in

Recommended MCQ

easy

Size of cells

Shape of cells

Physiological activity of cells

Type of genes present in mitochondrial DNA

Q112. Which of the following organelles is NOT considered a component of the endomembrane system?
(a) Endoplasmic reticulum
(b) Golgi body
(c) Lysosome
(d) Vacuole
(e) Nucleus Source: orcusprep.in

Recommended MCQ

easy

Both a and c

Only c

d and e both

Only e

Q113. Which membrane-bound vesicular structures are formed by the Golgi apparatus and are rich in hydrolytic enzymes? Source: orcusprep.in

Recommended MCQ

easy

Contractile vacuoles

Food vacuoles

Lysosomes

Centrosome

Q114. In the designations 70S and 80S for ribosomes, which of the following statements about the "S" are correct?
(a) It denotes the sedimentation coefficient.
(b) It is an indirect measure of density.
(c) It is an indirect measure of size. Source: orcusprep.in

Recommended MCQ

medium

a only

a and b only

b and c only

a, b and c

Q115. In the term ribosomal RNA (rRNA), what does the "r" represent? Source: orcusprep.in

Recommended MCQ

easy

Reversible

Ribozyme

Ribosomal

Recognition

Q116. During cell division, the loose and indistinct chromatin network of the interphase nucleus condenses to form which structured entities? Source: orcusprep.in

Recommended MCQ

easy

Nucleus

Plastids

Mitochondria

Structured chromosomes

Q117. The nucleus, as a distinct cell organelle, was first described by which scientist and in which year? Source: orcusprep.in

Recommended MCQ

easy

Robert Hooke, 1665

Robert Brown, 1831

Flemming, 1931

Strasburger, 1831

Q118. The perinuclear space, which separates the two parallel membranes of the nuclear envelope, typically has a width of: Source: orcusprep.in

Recommended MCQ

easy

10–50 nm

0.1 – 0.4 µm

10 – 50 Å

1 – 4 nm

Q119. In a single human cell, approximately how long is the thread of DNA and how many chromosomes is it distributed among? Source: orcusprep.in

Recommended MCQ

easy

2 cm, 46

2 metre, 46

2 cm, 23

2 metre, 23

Q120. What is the name for the approach to biology that involves a physicochemical analysis to understand living organisms? Source: orcusprep.in

Recommended MCQ

medium

Physicochemical biology

Reductionist biology

Fundamental biology

Biochemical biology

Q121. Which of the following statements about the fluid mosaic model of the cell membrane is INCORRECT? Source: orcusprep.in

Recommended MCQ

easy

Fluid mosaic model is widely accepted model.

Quasi fluid nature of lipids enables the lateral movement of proteins.

All types of molecules can easily pass through membrane.

Fluid nature of membrane is also important for cell growth & formation of intercellular junctions.

Q122. Which type of solutes can move across the plasma membrane down their concentration gradient without the assistance of a transport protein? Source: orcusprep.in

Recommended MCQ

medium

Positively charged solutes

Negatively charged solutes

Neutral solutes

Any of the above

Q123. Which of the following statements regarding the movement of molecules across the cell membrane is INCORRECT? Source: orcusprep.in

Recommended MCQ

medium

Neutral solute can move according to concentration gradient across the nonpolar lipid bilayer.

Water can also move according to concentration gradient across the plasma membrane.

Non polar molecules can not pass through non polar lipid bilayer.

Na+ & K+ can move across membrane through active transport.

Q124. A chromosome in which the centromere is positioned slightly away from the center, resulting in one longer arm and one shorter arm, is called a: Source: orcusprep.in

Recommended MCQ

easy

Metacentric

Submetacentric

Acrocentric

Telocentric

Q125. Which of the following statements about a secondary constriction on a chromosome is INCORRECT? Source: orcusprep.in

Recommended MCQ

medium

Non staining

Constant position

Known as satellite

Present in some chromosomes

Q126.

Column-I	Column-II
(A) Plasma membrane	(I) Helps in cell division of animal cells
(B) Centriole	(II) Protein synthesis
(C) Ribosomes	(III) Not present in animal cell
(D) Plastids	(IV) Rich in hydrolytic enzymes
(E) Lysosome	(V) Barrier between cytoplasm and outer environment, in an animal cell.

Source: orcusprep.in

Recommended MCQ

medium

A – V, B – I, C – II, D – III, E – IV

A – V, B – III, C – II, D – I, E – IV

A – IV, B – III, C – II, D – I, E – V

A – II, B – IV, C – III, D – I, E – V

Q127. Which of the following is NOT considered a function of the plant cell wall?
(i) Provides shape to the cell.
(ii) Protects the cell from mechanical damage and infection.
(iii) Helps in cell to cell connection.
(iv) Provides barrier to undesirable macromolecules.
(v) Helps in cell recognition Source: orcusprep.in

Recommended MCQ

easy

only (iii)

only (iv)

only (ii), (iii) & (v)

only (v)

Q128. Consider the following statements and identify the correct ones.
(A) Unicellular organisms are capable of independent existence.
(B) Cell is the fundamental structural and functional unit of all unicellular organisms only.
(C) All cells arise from pre-existing cells.
(D) The cytoplasm is the main arena of cellular activities of cells. Source: orcusprep.in

Recommended MCQ

medium

Statements A, C and D are correct

Statements A, B and D are not correct

Statements A, B and C are correct

Statements B, C and D are not correct

Q129. Which of the following statements about vacuoles is INCORRECT? Source: orcusprep.in

Recommended MCQ

easy

Contractile vacuoles are helpful in excretion

Food vacuoles are formed by engulfing the food particles

Sap vacuole is bound by tonoplast

Tonoplast facilitates the transport of ions against the concentration gradient into cytoplasm

Q130. Which of the following statements are TRUE for mitochondria?

(A)	Mitochondrial ribosome is smaller than prokaryotic ribosome
(B)	Single stranded circular DNA is present in matrix
(C)	Protein synthesis occurs in Mitochondrial matrix
(D)	Outer membrane is highly folded and form cristae

Source: orcusprep.in

Recommended MCQ

medium

A, C and D only

A, B and D only

Only C

A and D only

Q131. Which of the following characteristics are correct for a cell that has naked, double-stranded, circular DNA?
(a) Both 70S and 80S ribosomes
(b) Histone absent
(c) Compartmentalisation of cytoplasm absent
(d) Always diploid Source: orcusprep.in

Recommended MCQ

medium

a and d

b and c

a and c

b and d

Q132. Which of the following are functions of the Golgi complex?
(I) Modification of lipids and proteins
(II) Detoxification
(III) Formation of acrosome
(IV) Glycogen synthesis & breakdown Source: orcusprep.in

Recommended MCQ

medium

I and II are incorrect

I and III are correct

II is incorrect and remaining are correct

II and III are incorrect

Q133. If a eukaryotic cell were discovered on a planet without an oxygen-rich atmosphere, which organelle, specialized for aerobic respiration, would most likely be absent or non-functional? Source: orcusprep.in

Recommended MCQ

easy

Ribosomes

Golgi apparatus

Mitochondria

Endoplasmic Reticulum

Q134. In which of the following characteristics are both plant cells and prokaryotic cells similar to each other, but different from animal cells? Source: orcusprep.in

Recommended MCQ

medium

In possessing 70 S ribosomes

In possessing cell wall

In possessing mitochondria

In possessing chloroplasts

Q135. What is the approximate ratio of protein to lipid in the plasma membrane of a human erythrocyte? Source: orcusprep.in

Recommended MCQ

easy

1.8

1.3

0.80

0.60

Q136. During cell fractionation, a student finds an organelle bounded by a single membrane that shows high activity of the enzyme catalase. This organelle is most likely a: Source: orcusprep.in

Recommended MCQ

medium

SER

Chloroplast

Lysosome

Peroxisome

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Biology - Cell : The unit of life -Recommended MCQ

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Biology - Cell : The unit of life -Recommended MCQ

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