Quiz - biology - Biological Classification-PYQ

Q1. Five kingdom system of classification suggested by
R.H. Whittaker is not based on Source: orcusprep.in

NEET 2014

easy

presence or absence of a well defined nucleus

mode of reproduction

mode of nutrition

complexity of body organisation.

Q2. Maximum nutritional diversity is found in the group Source: orcusprep.in

NEET 2012

medium

fungi

animalia

monera

plantae.

Q3. In the five kingdom classification, Chlamydomonas and Chlorella have been included in Source: orcusprep.in

NEET Mains 2012

medium

protista

algae

plantae

monera.

Q4. In which kingdom would you classify the archaea and nitrogen-fixing organisms, if the five kingdom system of classification is used? Source: orcusprep.in

NEET 2003

hard

Plantae

Fungi

Protista

Monera

Q5. In five kingdom system, the main basis of classification is Source: orcusprep.in

NEET 2002

easy

structure of nucleus

mode of nutrition

structure of cell wall

asexual reproduction.

Q6. In the five kingdom system of classification, which single kingdom out of the following can include blue-green algae, nitrogen fixing bacteria and methanogenic archaebacteria? Source: orcusprep.in

NEET 1998

hard

Plantae

Protista

Monera

Fungi

Q7. BGA (blue green algae) are included in which of the following groups? Source: orcusprep.in

NEET 1996

easy

Bryophytes

Prokaryotes

Protista

Fungi

Q8. An important criterion for modern day classification is Source: orcusprep.in

NEET 1991

medium

resemblances in morphology

anatomical and physiological traits

breeding habits

presence or absence of notochord.

Q9. Match the organisms in column-I with habitats in column-II.
Column-I Column-II
A. Halophiles (i) Hot springs
B. Thermoacidophiles (ii) Aquatic environment
C. Methanogens (iii)Guts of ruminants
D. Cyanobacteria (iv) Salty area
Select the correct answer from the options given below. Source: orcusprep.in

Odisha NEET 2019

medium

A-(iv), B-(i), C-(iii), D-(ii)

A-(i), B-(ii), C-(iii), D-(iv)

A-(iii), B-(iv), C-(ii), D-(i)

A-(ii), B-(iv), C-(iii), D-(i)

Q10. Which of the following are found in extreme saline conditions? Source: orcusprep.in

NEET 2017

easy

Eubacteria

Cyanobacteria

Mycobacteria

Archaebacteria

Q11. Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen? Source: orcusprep.in

NEET 2017

medium

Pseudomonas

Mycoplasma

Nostoc

Bacillus

Q12. Which of the following components provides sticky character to the bacterial cell? Source: orcusprep.in

NEET 2017

easy

Nuclear membrane

Plasma membrane

Glycocalyx

Cell wall

Q13. DNA replication in bacteria occurs Source: orcusprep.in

NEET 2017

medium

within nucleolus

prior to fission

just before transcription

during S phase.

Q14. Methanogens belong to Source: orcusprep.in

NEET-II 2016

easy

eubacteria

archaebacteria

dinoflagellates

slime moulds.

Q15. The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals, include the Source: orcusprep.in

NEET-I 2016

easy

methanogens

eubacteria

halophiles

thermoacidophiles.

Q16. Archaebacteria differ from eubacteria in Source: orcusprep.in

NEET 2014

medium

cell membrane structure

mode of nutrition

cell shape

mode of reproduction.

Q17. Which of the following are likely to be present in deep sea water? Source: orcusprep.in

NEET 2013

medium

Blue-green algae

Saprophytic fungi

Archaebacteria

Eubacteria

Q18. Pigment containing membranous extensions in some cyanobacteria are Source: orcusprep.in

NEET 2013

easy

pneumatophores

chromatophores

heterocysts

basal bodies.

Q19. The cyanobacteria are also referred to as Source: orcusprep.in

NEET 2012

easy

protists

golden algae

slime moulds

blue green algae.

Q20. The most abundant prokaryotes helpful to humans in making curd from milk and in production of antibiotics are the ones categorised as Source: orcusprep.in

NEET 2012

easy

cyanobacteria

archaebacteria

chemosynthetic autotrophs

heterotrophic bacteria.

Q21. In eubacteria, a cellular component that resembles eukaryotic cell is Source: orcusprep.in

NEET 2011

medium

plasma membrane

nucleus

ribosomes

cell wall.

Q22. Some hyperthermophilic organisms that grow in highly acidic (pH 2) habitats belong to the two groups Source: orcusprep.in

NEET 2010

hard

eubacteria and archaea

cyanobacteria and diatoms

protists and mosses

liverworts and yeasts.

Q23. Select the correct combination of the statements (i-iv) regarding the characteristics of certain organisms.
(i) Methanogens are archaebacteria which produce methane in marshy areas.
(ii) Nostoc is a filamentous blue-green alga which fixes atmospheric nitrogen.
(iii) Chemosynthetic autotrophic bacteria synthesize cellulose from glucose.
(iv) Mycoplasma lack a cell wall and can survive without oxygen.
The correct statements are Source: orcusprep.in

NEET Mains 2010

hard

(ii) and (iii)

(i),(ii) and (iii)

(ii), (iii) and (iv)

(i), (ii) and (iv).

Q24. Bacterial leaf blight of rice is caused by a species Source: orcusprep.in

NEET 2008

medium

Alternaria

Erwinia

Xanthomonas

Pseudomonas.

Q25. Thermococcus, Methanococcus and Methanobacterium exemplify Source: orcusprep.in

NEET 2008

hard

bacteria whose DNA is relaxed or positively supercoiled but which have a cytoskeleton as well as mitochondria

bacteria that contain a cytoskeleton and ribosomes

archaebacteria that contain protein homologous to eukaryotic core histones

archaebacteria that lack any histones resembling those found in eukaryotes but whose DNA is negatively supercoiled.

Q26. In the light of recent classification of living organisms into three domains of life (bacteria, archaea and eukarya), which one of the following statements is true about archaea? Source: orcusprep.in

NEET 2008

hard

Archaea completely differ from both prokaryotes and eukaryotes.

Archaea completely differ from prokaryotes.

Archaea resemble eukarya in all respects.

Archaea have some novel features that are absent in other prokaryotes and eukaryotes.

Q27. Which one of the following statements about mycoplasma is wrong? Source: orcusprep.in

NEET 2007

medium

They are pleomorphic.

They are sensitive to penicillin.

They cause diseases in plants.

They are also called PPLO.

Q28. Curing of tea leaves is brought about by the activity of Source: orcusprep.in

NEET 2006

easy

fungi

bacteria

mycorrhiza

viruses.

Q29. All of the following statements concerning the actinomycetous filamentous soil bacterium Frankia are correct except that Frankia Source: orcusprep.in

NEET 2005

hard

can induce root nodules on many plant species

can fix nitrogen in the free-living state

cannot fix specialized vesicles in which the nitrogenase is protected from oxygen by a chemical barrier involving triterpene hopanoids

like Rhizobium, it usually infects its host plant through root hair deformation and stimulates cell proliferation in the host’s cortex.

Q30. For retting of jute the fermenting microbe used is Source: orcusprep.in

NEET 2005

medium

methanophilic bacteria

butyric acid bacteria

Helicobacter pylori

Streptococcus lactin.

Q31. Basophilic prokaryotes Source: orcusprep.in

NEET 2005

easy

grow and multiply in very deep marine sediments

occur in water containing high concentrations of barium hydroxide

readily grow and divide in sea water enriched in any soluble salt of barium

grow slowly in highly alkaline frozen lakes at high altitudes.

Q32. Which statement is correct for bacterial transduction? Source: orcusprep.in

NEET 2002

medium

Transfer of some genes from one bacteria to another bacteria through virus.

Transfer of genes from one bacteria to another bacteria by conjugation.

Bacteria obtained its DNA directly from mother cell.

Bacteria obtained DNA from other external source.

Q33. In bacteria, plasmid is Source: orcusprep.in

NEET 2002

easy

extra chromosomal material

main DNA

non functional DNA

repetitive gene.

Q34. Organisms which obtain energy by the oxidation of reduced inorganic compounds are called Source: orcusprep.in

NEET 2002

easy

photoautotrophs

chemoautotrophs

saprozoic

coproheterotrophs.

Q35. What is true for archaebacteria? Source: orcusprep.in

NEET 2001

easy

All halophiles

All photosynthetics

All fossils

Oldest living beings

Q36. Difference in Gram positive and Gram negative bacteria is due to Source: orcusprep.in

NEET 2001

medium

cell wall

cell membrane

ribosome

cytoplasm.

Q37. Transfer of genetic information from one bacterium to another in the transduction process is through Source: orcusprep.in

NEET 1998

medium

bacteriophages released from the donor bacterial strain

another bacterium having special organ for conjugation

physical contact between donor and recipient strains

conjugation between opposite strain bacterium.

Q38. A bacterium divides every 35 minutes. If a culture containing 10⁵ cells per mL is grown for 175 minutes, what will be the cell concentration per mL after 175 minutes? Source: orcusprep.in

NEET 1998

hard

35 × 10⁵ cells

32 × 10⁵ cells

175 × 10⁵ cells

85 × 10⁵ cells

Q39. The DNA of E.coli is Source: orcusprep.in

NEET 1998

easy

double stranded and linear

double stranded and circular

single stranded and linear

single stranded and circular.

Q40. The main role of bacteria in the carbon cycle involves Source: orcusprep.in

NEET 1998

medium

chemosynthesis

digestion or breakdown of organic compounds

photosynthesis

assimilation of nitrogenous compounds.

Q41. A few organisms are known to grow and multiply at temperatures of 100-105^oC. They belong to Source: orcusprep.in

NEET 1998

medium

thermophilic sulphur bacteria

hot spring blue-green algae

methanogenic archaebacteria

marine archaebacteria.

Q42. The hereditary material present in the bacterium E.coli is Source: orcusprep.in

NEET 1997

easy

single-stranded DNA

double-stranded DNA

DNA

RNA.

Q43. Azotobacter and Bacillus polymyxa are the examples of Source: orcusprep.in

NEET 1996

medium

pathogenic bacteria

decomposers

symbiotic N₂ fixer

non-symbiotic N₂ fixer.

Q44. What are the sex organs provided in some bacteria? Source: orcusprep.in

NEET 1996

medium

Sex pili

Plasmid

Circular DNA

Gametes

Q45. Which type of DNA is found in bacteria? Source: orcusprep.in

NEET 1996

easy

Circular free DNA

Membrane bound DNA

Straight DNA

Helical DNA

Q46. A large number of organic compounds can be decomposed by Source: orcusprep.in

NEET 1995

medium

Azotobacter

Chemolithotrophs

Mycoplasma

Pseudomonas.

Q47. Many blue-green algae occur in thermal springs (hot-water springs). The temperature tolerance of these algae have been attributed to their Source: orcusprep.in

NEET 1994

hard

mitochondrial structure

importance of homopolar bonds in their proteins

cell wall structure

modern cell organization.

Q48. Organisms, which fix atmospheric nitrogen in the soil, fall under the category of Source: orcusprep.in

NEET 1994

easy

bacteria

green algae

soil fungi

mosses.

Q49. Transduction in bacteria is mediated by Source: orcusprep.in

NEET 1994

medium

plasmid vectors

phage vectors

cosmids

F-factors.

Q50. Genophore/bacterial genome or nucleoid is made of Source: orcusprep.in

NEET 1993

medium

histones and non-histones

RNA and histones

a single double stranded DNA

a single stranded DNA.

Q51. Escherichia coli is used extensively in biological research as it is Source: orcusprep.in

NEET 1993

easy

easily cultured

easily available

easy to handle

easily multiplied in host.

Q52. Bacteria lack alternation of generation because there is Source: orcusprep.in

NEET 1992, 1991

hard

neither syngamy nor reduction division

distinct chromosomes are absent

no conjugation

no exchange of genetic material.

Q53. Name the organisms which do not derive energy directly or indirectly from sun. Source: orcusprep.in

NEET 1991

medium

Chemosynthetic bacteria

Pathogenic bacteria

Symbiotic bacteria

Mould

Q54. The main difference in Gram (+)ve and Gram (–)ve bacteria resides in their Source: orcusprep.in

NEET 1990

medium

cell wall

cell membrane

cytoplasm

flagella.

Q55. Which one belongs to Monera? Source: orcusprep.in

NEET 1990

easy

Amoeba

Escherichia

Gelidium

Spirogyra

Q56. Which of the following organisms are known as chief producers in the oceans? Source: orcusprep.in

NEET 2018

easy

Dinoflagellates

Diatoms

Cyanobacteria

Euglenoids

Q57. Ciliates differ from all other protozoans in Source: orcusprep.in

NEET 2018

medium

using flagella for locomotion

having a contractile vacuole for removing excess water

using pseudopodia for capturing prey

having two types of nuclei.

Q58. Select the wrong statement. Source: orcusprep.in

NEET-II 2016

medium

The walls of diatoms are easily destructible.

‘Diatomaceous earth’ is formed by the cell walls of diatoms.

Diatoms are chief producers in the oceans.

Diatoms are microscopic and float passively in water.

Q59. Chrysophytes, Euglenoids, Dinoflagellates and Slime moulds are included in the Kingdom Source: orcusprep.in

NEET-I 2016

easy

Fungi

Animalia

Monera

Protista.

Q60. In which group of organisms the cell walls form two thin overlapping shells which fit together? Source: orcusprep.in

NEET 2015

easy

Dinoflagellates

Slime moulds

Chrysophytes

Euglenoids

Q61. Which one of the following organisms is not an eukaryote? Source: orcusprep.in

NEET 2011

easy

Paramecium caudatum

Escherichia coli

Euglena viridis

Amoeba proteus

Q62. Which one of the following is a slime mould? Source: orcusprep.in

NEET 2007

easy

Physarum

Thiobacillus

Anabaena

Rhizopus

Q63. Auxospores and hormogonia are formed, respectively, by Source: orcusprep.in

NEET 2005

hard

some diatoms and several cyanobacteria

some cyanobacteria and many diatoms

several cyanobacteria and several diatoms

several diatoms and a few cyanobacteria.

Q64. When a fresh-water protozoan possessing a contractile vacuole, is placed in a glass containing marine water, the vacuole will Source: orcusprep.in

NEET 2004

medium

increase in number

disappear

increase in size

decrease in size.

Q65. The chief advantage of encystment of an Amoeba is Source: orcusprep.in

NEET 2003

medium

the ability to survive during adverse physical conditions

the ability to live for sometime without ingesting food

protection from parasites and predators

the chance to get rid of accumulated waste products.

Q66. In which of the following animals dimorphic nucleus is found? Source: orcusprep.in

NEET 2002

easy

Amoeba proteus

Trypanosoma gambiense

Plasmodium vivax

Paramecium caudatum

Q67. In protozoa like Amoeba and Paramecium, the organ for osmoregulation is Source: orcusprep.in

NEET 2002

easy

contractile vacuole

mitochondria

nucleus

food vacuole.

Q68. Which of the following organisms possesses characteristics of a plant and an animal? Source: orcusprep.in

NEET 1995

medium

Euglena

Paramecium

Bacteria

Mycoplasma

Q69. The function of contractile vacuole, in protozoa, is Source: orcusprep.in

NEET 1995

easy

osmoregulation

reproduction

locomotion

digestion of food.

Q70. The protists have Source: orcusprep.in

NEET 1994

medium

only free nucleic acid aggregates.

membrane bound nucleoproteins lying embedded in the cytoplasm

gene containing nucleoproteins condensed together in loose mass

nucleoprotein in direct contact with the rest of the cell substance.

Q71. In Amoeba and Paramecium osmoregulation occurs through Source: orcusprep.in

NEET 1991

easy

pseudopodia

nucleus

contractile vacuole

general surface.

Q72. Plasmodium, the malarial parasite, belongs to class Source: orcusprep.in

NEET 1990

medium

sarcodina

ciliata

sporozoa

dinophyceae.

Q73. Which is true about Trypanosoma? Source: orcusprep.in

NEET 1990

hard

Polymorphic

Monogenetic

Facultative parasite

Non-pathogenic

Q74. Genetic information in Paramecium is contained in Source: orcusprep.in

NEET 1990

medium

micronucleus

macronucleus

both micronucleus and macronucleus

mitochondria.

Q75. Trypanosoma belongs to Class Source: orcusprep.in

NEET 1989

medium

Sarcodina

Zooflagellata

Ciliata

Sporozoa.

Q76. Which of the following statements is incorrect? Source: orcusprep.in

NEET 2019

medium

Yeasts have filamentous bodies with long thread like hyphae.

Morels and truffles are edible delicacies.

Claviceps is a source of many alkaloids and LSD.

Conidia are produced exogenously and ascospores endogenously.

Q77. Match column -I with column - II.
Column-I Column-II
A. Saprophyte (i) Symbiotic association of fungi with plant roots
B. Parasite (ii) Decomposition of dead organic materials
C. Lichens (iii) Living on living plants or animals
D. Mycorrhiza (iv) Symbiotic association of algae and fungi
Choose the correct answer from the options given below. Source: orcusprep.in

NEET 2019

easy

(a) (ii) (iii) (iv) (i)

(b) (i) (ii) (iii) (iv)

(c) (iii) (ii) (i) (iv)

(d) (ii) (i) (iii) (iv)

Q78. Which among the following is not a prokaryote? Source: orcusprep.in

NEET 2018

easy

Saccharomyces

Mycobacterium

Nostoc

Oscillatoria

Q79. After karyogamy followed by meiosis, spores are produced exogenously in Source: orcusprep.in

NEET 2018

hard

Neurospora

Alternaria

Agaricus

Saccharomyces.

Q80. Which one of the following is wrong for fungi? Source: orcusprep.in

NEET-II 2016

easy

They are eukaryotic.

All fungi possess a purely cellulosic cell wall.

They are heterotrophic.

They are both unicellular and multicellular.

Q81. Which one of the following statements is wrong? Source: orcusprep.in

NEET-I 2016

easy

Eubacteria are also called false bacteria.

Phycomycetes are also called algal fungi.

Cyanobacteria are also called blue-green algae.

Golden algae are also called desmids.

Q82. One of the major components of cell wall of most fungi is Source: orcusprep.in

NEET-I 2016

easy

cellulose

hemicellulose

chitin

peptidoglycan.

Q83. The imperfect fungi which are decomposers of litter and help in mineral cycling belong to Source: orcusprep.in

NEET 2015

medium

Phycomycetes

Ascomycetes

Deuteromycetes

Basidiomycetes.

Q84. Choose the wrong statement. Source: orcusprep.in

NEET 2015

easy

Morels and truffles are poisonous mushrooms.

Yeast is unicellular and useful in fermentation.

Penicillium is multicellular and produces antibiotics.

Neurospora is used in the study of biochemical genetics.

Q85. Which one of the following matches is correct? Source: orcusprep.in

NEET 2015 Cancelled

hard

Mucor Reproduction by conjugation Ascomycetes

Agaricus Parasitic fungus Basidiomycetes

Phytophthora Aseptate mycelium Basidiomycetes

Alternaria Sexual reproduction absent Deuteromycetes

Q86. Which one of the following fungi contains hallucinogens? Source: orcusprep.in

NEET 2014

medium

Morchella esculenta

Amanita muscaria

Neurospora sp.

Ustilago sp.

Q87. Which one of the following is true for fungi? Source: orcusprep.in

Karnataka NEET 2013

easy

They lack a rigid cell wall.

They are heterotrophs.

They lack nuclear membrane.

They are phagotrophs.

Q88. The pathogen Microsporum responsible for ringworm disease in humans belongs to the same kingdom of organisms as that of Source: orcusprep.in

NEET Mains 2011

medium

Taenia, a tapeworm

Wuchereria, a filarial worm

Rhizopus, a mould

Ascaris, a round worm.

Q89. Single-celled eukaryotes are included in Source: orcusprep.in

NEET 2010

easy

protista

fungi

archaea

monera.

Q90. Membrane-bound organelles are absent in Source: orcusprep.in

NEET 2010

easy

Saccharomyces

Streptococcus

Chlamydomonas

Plasmodium.

Q91. Black (stem) rust of wheat is caused by Source: orcusprep.in

NEET Mains 2010

easy

Alternaria solani

Ustilago nuda

Puccinia graminis

Xanthomonas oryzae.

Q92. Which one is the wrong pairing for the disease and its causal organism? Source: orcusprep.in

NEET 2009

medium

Black rust of wheat-Puccinia graminis

Loose smut of wheat-Ustilago nuda

Root knot of vegetables-Meloidogyne sp.

Late blight of potato-Alternaria solani

Q93. Which pair of the following belongs to basidiomycetes? Source: orcusprep.in

NEET 2007

hard

Puffballs and Claviceps

Peziza and stink horns

Morchella and mushrooms

Birds nest fungi and puffballs

Q94. Which of the following environmental conditions are essential for optimum growth of Mucor on a piece of bread ?
A. Temperature of about 25°C
B. Temperature of about 5°C
C. Relative humidity of about 5%
D. Relative humidity of about 95%
E. A shady place
F. A brightly illuminated place
Choose the answer from the following options. Source: orcusprep.in

NEET 2006

medium

B, C and F only

A, C and E only

A, D and E only

B, D and E only

Q95. Which fungal disease spreads by seed and flowers? Source: orcusprep.in

NEET 2002

medium

Loose smut of wheat

Corn smut

Covered smut of barley

Soft rot of potato

Q96. Which of the following secretes toxins during storage conditions of crop plants? Source: orcusprep.in

NEET 2002

medium

Aspergillus

Penicillium

Fusarium

Colletotrichum

Q97. Black rust of wheat is caused by Source: orcusprep.in

NEET 2000

easy

Puccinia

Ustilago

Albugo

Phytophthora.

Q98. Columella is a specialized structure found in the sporangium of Source: orcusprep.in

NEET 1999

hard

Spirogyra

Ulothrix

Rhizopus

none of these.

Q99. Puccinia forms uredia and Source: orcusprep.in

NEET 1998

hard

telia on wheat leaves

aecia on barberry leaves

pycnia on barberry leaves

aecia on wheat leaves.

Q100. Mycorrhiza is correctly described as Source: orcusprep.in

NEET 1996

easy

parasitic association between roots and some fungi

symbiotic relationship between fungi and roots of some higher plants

symbiosis of algae and fungi

relation of ants with the stem of some trees.

Q101. The black rust of wheat is a fungal disease caused by Source: orcusprep.in

NEET 1995

easy

Albugo candida

Puccinia graminis tritici

Melampsora lini

Claviceps purpurea.

Q102. Select the wrong statement. Source: orcusprep.in

NEET 2018

easy

Cell wall is present in members of fungi and plantae.

Mushrooms belong to basidiomycetes.

Pseudopodia are locomotory and feeding structures in sporozoans.

Mitochondria are the powerhouse of the cell in all kingdoms except monera.

Q103. Cell wall is absent in Source: orcusprep.in

NEET 2015

easy

Mycoplasma

Nostoc

Aspergillus

Funaria.

Q104. True nucleus is absent in Source: orcusprep.in

NEET 2015 Cancelled

easy

Vaucheria

Volvox

Anabaena

Mucor.

Q105. Nuclear membrane is absent in Source: orcusprep.in

NEET 2012

easy

Penicillium

Agaricus

Volvox

Nostoc.

Q106. Absorptive heterotrophic nutrition is exhibited by Source: orcusprep.in

NEET 1990

easy

algae

fungi

bryophytes

pteridophytes.

Q107. Pick up the wrong statement. Source: orcusprep.in

NEET 2015

easy

Some fungi are edible.

Nuclear membrane is present in Monera.

Cell wall is absent in Animalia.

Protists have photosynthetic and heterotrophic modes of nutrition.

Q108. Which one of the following living organisms completely lacks a cell wall? Source: orcusprep.in

NEET 2014

medium

Cyanobacteria

Sea-fan (Gorgonia)

Saccharomyces

Blue-green algae

Q109. Which of the following is correct about viroids? Source: orcusprep.in

NEET 2020

easy

They have RNA with protein coat.

They have free RNA without protein coat.

They have DNA with protein coat.

They have free DNA without protein coat.

Q110. Mad cow disease in cattle is caused by an organism which has Source: orcusprep.in

Odisha NEET 2019

medium

inert crystalline structure

abnormally folded protein

free RNA without protein coat

free DNA without protein coat.

Q111. Which of the following statements is incorrect? Source: orcusprep.in

NEET 2019

medium

Prions consist of abnormally folded proteins.

Viroids lack a protein coat.

Viruses are obligate parasites.

Infective constituent in viruses is the protein coat.

Q112. Viroids differ from viruses in having Source: orcusprep.in

NEET 2017

easy

DNA molecules without protein coat

RNA molecules with protein coat

RNA molecules without protein coat

DNA molecules with protein coat.

Q113. Which of the following statements is wrong for viroids? Source: orcusprep.in

NEET-I 2016

easy

They cause infections.

Their RNA is of high molecular weight.

They lack a protein coat.

They are smaller than viruses.

Q114. Select the wrong statement. Source: orcusprep.in

NEET 2015

medium

The term ‘contagium vivum fluidum’ was coined by M. W. Beijerinck.

Mosaic disease in tobacco and AIDS in human being are caused by viruses.

The viroids were discovered by D.J. Ivanowsky.

W.M. Stanley showed that viruses could be crystallised.

Q115. Which of the following shows coiled RNA strand and capsomeres? Source: orcusprep.in

NEET 2014

easy

Polio virus

Tobacco mosaic virus

Measles virus

Retrovirus

Q116. Viruses have Source: orcusprep.in

NEET 2014

easy

DNA enclosed in a protein coat

prokaryotic nucleus

single chromosome

both DNA and RNA.

Q117. Which statement is wrong for viruses? Source: orcusprep.in

NEET 2012

medium

All are parasites.

All of them have helical symmetry.

They have ability to synthesize nucleic acids and proteins.

Antibiotics have no effect on them.

Q118. Which one single organism or the pair of organisms is correctly assigned to its or their named taxonomic group? Source: orcusprep.in

NEET 2012

medium

Paramecium and Plasmodium belong to the same kingdom as that of Penicillium.

Lichen is a composite organism formed from the symbiotic association of an algae and a protozoan.

Yeast used in making bread and beer is a fungus.

Nostoc and Anabaena are examples of protista.

Q119. Virus envelope is known as Source: orcusprep.in

NEET 2010

easy

capsid

virion

nucleoprotein

core.

Q120. T.O. Diener discovered a Source: orcusprep.in

NEET 2009

easy

free infectious DNA

infectious protein

bacteriophage

free infectious RNA.

Q121. There exists a close association between the alga and the fungus within a lichen. The fungus Source: orcusprep.in

NEET 2005

medium

provides protection, anchorage and absorption for the algae

provides food for the alga

fixes the atmospheric nitrogen for the alga

releases oxygen for the alga.

Q122. Which of the following statements is not true for retroviruses? Source: orcusprep.in

NEET 2004

hard

DNA is not present at any stage in the life cycle of retroviruses.

Retroviruses carry gene for RNA-dependent DNA polymerase.

The genetic material in mature retroviruses is RNA.

Retroviruses are causative agents for certain kinds of cancer in man.

Q123. Viruses that infect bacteria multiply and cause their lysis, are called Source: orcusprep.in

NEET 2004

easy

lysozymes

lipolytic

lytic

lysogenic.

Q124. Lichens are well known combination of an alga and a fungus where fungus has Source: orcusprep.in

NEET 2004

easy

a saprophytic relationship with the alga

an epiphytic relationship with the alga

a parasitic relationship with alga

a symbiotic relationship with alga.

Q125. Which one of the following statements about viruses is correct? Source: orcusprep.in

NEET 2003

easy

Viruses possess their own metabolic system.

All viruses contain both RNA and DNA.

Viruses are obligate parasites.

Nucleic acid of viruses is known as capsid.

Q126. Tobacco mosaic virus is a tubular filament of size Source: orcusprep.in

NEET 2003

medium

300 × 10nm

300 × 5nm

300 × 20nm

700 × 30nm.

Q127. Viruses are no more “alive” than isolated chromosomes because Source: orcusprep.in

NEET 2003

medium

they require both RNA and DNA

they both need food molecules

they both require oxygen for respiration

both require the environment of a cell to replicate.

Q128. Cauliflower mosaic virus contains Source: orcusprep.in

NEET 2001

medium

ss RNA

ds RNA

ds DNA

ss DNA.

Q129. Viruses possess Source: orcusprep.in

NEET 1997

easy

ribosomes to synthesize protein

organelle for its vital mechanism

either DNA or RNA

none of these.

Q130. Most of the lichens consist of Source: orcusprep.in

NEET 1997

medium

green algae and ascomycetes

brown algae and higher plant

blue green algae and basidiomycetes

red algae and ascomycetes.

Q131. What is the genetic material in influenza virus? Source: orcusprep.in

NEET 1996

easy

Double helical DNA

RNA

Single helix DNA

None of these

Q132. Which one of the following statement about lichens is wrong? Source: orcusprep.in

NEET 1996

easy

These grow very rapidly (2 cm per day).

They show fungal and algal symbiotic relationships.

Some of its species are eaten by reindeers.

These are pollution indicators.

Q133. The tailed bacteriophages are Source: orcusprep.in

NEET 1995

medium

motile on surface of bacteria

non-motile

motile on surface of plant leaves

actively motile in water.

Q134. Tobacco mosaic virus (TMV) genes are Source: orcusprep.in

NEET 1994

easy

single stranded RNA

double stranded DNA

proteinaceous

double stranded RNA.

Q135. Organisms which are indicator of SO2 pollution of air Source: orcusprep.in

NEET 1992

easy

mosses

lichens

mushrooms

puffballs.

Q136. Lichens indicate SO2 pollution because they Source: orcusprep.in

NEET 1989

medium

show association between algae and fungi

grow faster than others

are sensitive to SO2

flourish in SO2 rich environment.

Q137. Given below is the diagram of a bacteriophage. In
which one of the options all the four parts A, B, C
and D are correct? Source: orcusprep.in

NCERT

easy

a

b

c

d

Loading...

Biology - Biological Classification-PYQ

Loading...

Biology - Biological Classification-PYQ

Image Preview