Q1.
All cells reproduce by dividing into _ _ _ _ _ , with each parental cells giving rise to_ _ _ _ _ _ cells each time they divide.
A) One ; four daughter
B) Two ; two daughter
C) One ; two daughter
D) Two ; four daughter
Q2.
A cell cycle comprises all the listed events, except:
A) Cell growth
B) DNA replication
C) Transcription
D) Cell division
Q3.
Consider the following statements-
Statement-I: cell growth (in terms of cytoplasmic increases) is a contingent process which occur during cell cycle.
Statement-II: DNA synthesis occur only during one specific stage in the cell cycle.
Statement-III: The event of cell cycle are under genetic control.
A) Statement-I is false & statement-II and III are true
B) Statement-I and II are false & statement-III are true
C) All statement are true
D) None of the above stated statement are true.
Q4.
Cell of human divide once in approximately-
A) 60 minutes
B) 90 minutes
C) 24 hours
D) None of these
Q5.
Read the following statements and choose the correct option.
Statement A: The M-phase represents the phase when actual cell division occurs
Statement B: Interphase represents the phase between two successive M-phases
A) Only statement A is correct
B) Only statement B is correct
C) Both the statements are incorrect
D) Both the statements are correct
Q6.
Match the columns and choose the correct option
| Column I | Column II |
|---|
| (a) G1 phase | (i) Quiescent stage of the cell cycle. |
| (b) G2 phase | (ii) DNA denoted as 2C, increases to 4C |
| (c) Synthesis phase | (iii) Proteins are synthesized in preparation for mitosis |
| (d) G0 phase | (iv) Cell contain initial amount of DNA i.e., 2C |
A) a-iv, b-iii, c-i, d-ii
B) a-iv, b-iii, c-ii, d-i
C) a-iii, b-i, c-iv, d-ii
D) a-ii, b-iv, c-ii, d-i
Q7.
An average duration of yeast cell cycle is-
A) 60 minutes
B) 90 minutes
C) 20 minutes
D) One day
Q8.
Cell cycle is divided into how many basic phases
A) One
B) Two
C) Four
D) Six
Q9.
Which of following is/are enlisted as basic phases of cell cycle?
A) G0 phase
B) S phase
C) Interphase
D) Metaphase
Q10.
The phase of cell cycle during which mitosis occur is-
A) Interphase
B) M-phase
C) G-phase
D) S-phase
Q11.
The phase between two successive M-phase is-
A) Interphase
B) G-phase
C) S-phase
D) M-phase
Q12.
The time span of interphase and M-phase is an average human cell cycle is-
A) 12 hours each
B) 95% M-phase & one hour interphase
C) 8 hour M-phase & 16 hour interphase
D) One hour M-phase & 23 hour interphase
Q13.
The correct sequence of cell is-
A) M -> G2 -> S -> G1
B) S -> G2 -> G1 -> M
C) M -> G1 -> G2 -> S
D) G1 -> S -> G2 -> M
Q14.
The process which mark as start & usually end of M-phase are-
A) Division of cytoplasm & Karyokinesis respectively
B) Cytokinesis and division of cytoplasm respectively
C) Separation of daughter chromosome & cytokinesis respectively
D) Karyokinesis & karyokinesis respectively
Q15.
Resting phase of cell-cycle is-
A) M-phase
B) Interkinesis
C) G1 & G2 phase
D) Interphase
Q16.
Interphase is divided into_ _ _ phases further.
A) 4
B) 3
C) 2
D) 5
Q17.
Which of following stage corresponds to the interval between mitosis & initiation of DNA replication?
A) S-phase
B) G2-phase
C) M-phase
D) G1-phase
Q18.
Select the correct statement about G1 phase-
A) Cell is metabotically inactive
B) DNA does not replicate
C) DNA replicate
D) Chromosome number is doubled
Q19.
Correct sequence of phase of M-phase is-
A) Cytokinesis -> Prophase -> Metaphase -> Anaphase -> Telophase
B) Prophase -> Anaphase -> Metaphase -> Telophase -> Cytokinesis
C) G0 -> G1 -> S -> G2
D) None of these
Q20.
What would be amount of DNA (C) and number of chromosome (N) in animal cell just after completion of S phase if the initial amount is 2C and 2N?
A) 2C and 2N respectively
B) 4C and 4N respectively
C) 4C and 2N respectively
D) 2C and 4N respectively
Q21.
Duplication of centriole occur in-
A) M-phase
B) G2-phase
C) S-phase
D) G0-phase
Q22.
The S-phase of animal cell marked by-
A) DNA replication
B) Centriole duplication
C) Cell growth and protein synthesis
D) A & B
Q23.
The G2 of cell cycle is pronounced by-
A) Cell growth and division
B) Cell duplication
C) Protein synthesis & centriole duplication
D) Cell growth & protein synthesis
Q24.
Find mismatch column.
| Column-I | Column-II |
|---|
| A) Karyokinesis | Separation of daughter chromosome |
| B) cytokinesis | Division of cytoplasm |
| C) Interphase | Smallest phase of cell cycle |
| D) M-phase | Mitosis phase |
Q25.
The inactive stage of cell cycle is-
A) Quiescent stage
B) G1
C) S – Phase
D) A & B
Q26.
Choose the correct statement with respect to G0 phase:
A) Also known as quiescent stage and start after G2 phase
B) Cell of this stage remain unactive and no longer proliferation
C) Cell of this stage remain in active but no longer proliferation unless called to do so depending on the requirement of organism
D) Cell of this stage remain active and proliferation till death without any condition
Q27.
How many chromosome does onion somatic cell have –
A) 12
B) 14
C) 16
D) 20
Q28.
What number of chromosome does onion somatic cell have in G, S, G2 & M – phase respectively
A) 32, 16, 16, 32
B) 16, 32, 16, 16
C) 16, 16, 16, 16
D) None of these
Q29.
Mitotic division occur in –
A) Diploid somatic cell
B) Haploid male honey bee
C) A & B
D) Gametes
Q30.
Match the following column:
| Column – I | Column – II |
|---|
| a) G1 Phase | i) Metabolically active cell, do not proliferate |
| b) S Phase | ii) Content of DNA doubled |
| c) G0 phase | iii) Protein synthesised |
| d) G2 Phase | iv) Metabolically active cell grows continuously |
A) a – iv), b – ii), c – i), d – iii)
B) a – i), b – ii), c – iv), d – iii)
C) a – iv), b – iii), c – i), d - ii
D) None of these
Q31.
M – phase refer to –
A) Metaphase
B) Meiosis
C) Karyokinesis
D) A & B both
Q32.
Most dramatic period of cell cycle is-
A) Gap 1 only
B) M-phase
C) S-phase only
D) Interphase
Q33.
Equational division refer to –
A) Meiosis
B) Mitosis
C) Number of cell chromosome in parent & progeny cell is same
D) B & C
Q34.
Karyokinesis of mitosis is divided into ________ stages
A) 2
B) 3
C) 4
D) 8
Q35.
Correct order of mitotic division is –
A) Metaphase → Anaphase → Prophase → Telophase
B) Prophase → Metaphase → Anaphase → Telophase
C) Anaphase → Telophase → Metaphase → Prophase
D) Telophase → Prophase → Anaphase → Metaphase
Q36.
Select the correct option:
I) Prophase is first stage of Karyokinesis.
II) It occur after completion of protein synthesis during cell cycle
A) Both (I) & (II) are true
B) Both (I) & (II) are false
C) (I) is true but (II) is false
D) (I) is false but (II) is true
Q37.
During prophase, which of the following occurs?
A) Condensation of chromosomal material
B) Chromosomal material become tangled
C) Centrosome duplication
D) Movement of both centriole at one pole of cell
Q38.
Choose the incorrect match
A) Beginning of movement of chromosome to opposite poles – Prophase
B) Two asters with spindle – Mitotic apparatus
C) Attachment of spindle – Metaphase
D) Chromosome move to opposite poles – Metaphase
Q39.
Mitotic apparatus consist of –
A) Four asters with spindle fibres
B) One asters with spindle fibres
C) Two asters with spindle fibres
D) Centrosome with their microtubules without spindle fibres.
Q40.
How many of following structures are observed when cells are viewed under the microscope at end of prophase Golgi body, ER, Nucleolus, Nuclear envelop, centrosome
A) Zero
B) One
C) Three
D) All of these
Q41.
How do the chromosome appear during prophase of animal cell during mitosis
A) Consisting of four chromatid which remain attached to centromere
B) Consisting of two chromatid which remain attached to centromere
C) Consisting of four chromatid without centromere
D) As chromatin material without any defined structure
Q42.
Asters formed during prophase are –
A) Composed of microtubules originate from centromere
B) Composed of protein which secreted by golgi body
C) Highly condensed area of chromosome
D) None of these
Q43.
What difference would indicate early prophase & late prophase of animal cell.
| Early Prophase | Late Prophase |
|---|
| A) Nucleolus & nuclear membrane present | Nucleolus & nuclear membrane are absent |
| B) Chromosomes are highly condensed | There is no condensation of chromosome |
| C) Nucleolus & centrosome are present | Nucleolus & centromere are absent |
| D) Other organelles like ER, golgi body complexes are not observed | Other organelles like ER, golgi complex are observed. |
Q44.
Identify correct stage of given diagram.
A) Late prophase Early prophase
B) Early prophase Late prophase
C) Metaphase Prophase
D) Prophase Metaphase
Q45.
The complete disintegration of nuclear envelop marks start of:
A) Late prophase
B) Metaphase
C) Anaphase
D) None of these
Q46.
Identify stage of given diagram
A) Early prophase, metaphase
B) Late prophase, transition to metaphase
C) Early prophase, transition to metaphase
D) Late prophase, metaphase
Q47.
Which stage of cell cycle is best to study chromosome morphology
A) Late prophase
B) Early prophase
C) Anaphase
D) Metaphase
Q48.
Condensation of chromosome is completed in –
A) Stage where centrosome is duplicated
B) Stage where DNA content doubled
C) Stage where complete integration of nuclear envelope occurs
D) Stage where complete disintegration of nucleus envelope occurs
Q49.
Metaphase chromosome is made up of –
A) Two non – sister chromatid which are held together by centromere
B) Four sister chromatid which are held together by centromere
C) Two sister chromatid which are held together by centromere
D) Four non – sister chromatid which are held together by centromere
Q50.
Kinetochores are
A) Precursors of microtubules
B) Sites of attachment of spindle fibres
C) Site for origination of spindle fibres
D) Small disc – shaped structure at telomere of chromosome
Q51.
Metaphase is characterised by –
A) Some chromosomes coming to lie at the pole
B) One chromatid of each chromosome connected by its centromere to spindle fibres from one pole
C) Sister chromatid connected by its kinetochore to spindle fibres from opposite poles
D) All of these
Q52.
Identify stage
A) Transition to metaphase
B) Anaphase
C) Metaphase
D) Telophase
Q53.
At the onset of anaphase, each chromosome split into –
A) One chromatid
B) Four daughter chromatids
C) Two daughter chromosomes
D) Eight chromatids
Q54.
Anaphase is characterised by –
i) Migration of daughter chromatid toward equator.
ii) centromere of each chromosome remain directed toward pole
iii) centromere of each chromosome remain directed toward equator
iv) Chromatid split and centromere separate
v) Chromatid separate after centromere split
A) i, ii, v
B) ii, v
C) iii, v
D) ii, iv
Q55.
Identify stage –
A) Anaphase
B) Telophase
C) Interphase
D) Metaphase
Q56.
During telophase:
(i) Chromosome cluster at opposite spindle poles
(ii) Two daughter nuclei formed
(iii)Chromosomes lose their individuality
(iv) It is reversal of prophase
(v) Nucleolus is not reformed
Choose the incorrect statement:-
Q57.
Match the following column –
| Column I | Column II |
|---|
| a Syncytium | i Divide the cytoplasm of animal cell |
| b Cell-plate | ii Occur in liquid endosperm of coconut |
| c Cell furrow | iii Method of cytokinesis in plant cell |
A) a-iii, b-ii, c-i
B) a-ii, b-iii, c-i
C) a-i, b-ii, c-iii
D) a-ii, b-i, c-iii
Q58.
Cell plate represent –
A) Primary lamella
B) Middle lamella
C) Both
D) formation of plate by lysosome
Q59.
Mitosis usually results in
A) haploid daughter cells with identical genetical complement
B) growth of multicellular organism
C) diploid daughter cells without identical genetical complement
D) haploid daughter cells without identical genetical complement
Q60.
Which one is odd w.r.t. significance of meiosis?
A) Increase genetic variability in organisms
B) Helps in restoring of original chromosome number in a sexually reproducing species.
C) Ensure production of haploid phase
D) Cell repair
Q61.
The growth in plant is/are contributed by
A) Mitotic division in apical meristem
B) Meiotic division in lateral meristem
C) Meiotic division in apical meristem
D) A & B both
Q62.
a) The nucleo-cytoplasmic ratio in organism is restore by mitosis
b) The cells of the upper layer of the epidermis, cells of lining of gut, and blood cells are being constantly replaced by Mitotic division.
Choose the correct option from following :-
Q63.
Meiosis result in
A) production of gametes
B) reduction in number of chromosomes
C) introduction of variation
D) all of these
Q64.
Meiosis ensure the production of …………… phase in life cycle of sexually reproduction organisms whereas fertilization restore ……….. phase.
A) haploid & haploid respectively
B) haploid & diploid respectively
C) diploid & diploid respectively
D) diploid & haploid respectively
Q65.
Which of the following statement is correct?
A) Meiosis involves single cycle of nuclear and cell division
B) Doubling of chromosomes occur once during s-phase
C) Recombination between sister chromatid of non-homologous chromosome
D) Pairing of homologous chromosome
Q66.
At the end of meiosis-II, how many haploid cells are formed?
A) One
B) Two
C) Zero
D) Four
Q67.
Recombination occurs between –
A) sister chromatid of non-homologous chromosome
B) non-sister chromatid of non homologous chromosome
C) sister chromatid of homologous chromosome
D) non-sister chromatid of homologous chromosome
Q68.
Longest phase of meiosis is :
A) Prophase-I
B) Prophase-II
C) Metaphase-I
D) Telophase-II
Q69.
During which of the given phases, homologous chromosomes separate, while sister chromatids remain associated at their centromere?
A) Anaphase of mitosis
B) Anaphase II
C) Anaphase I
D) Metaphase I
Q70.
Prophase-I of meiosis is divided into …………. phase based on chromosomal behaviour.
A) 2
B) 3
C) 4
D) 5
Q71.
Identify correct sequence of prophase-I.
A) leptotene, Diplotene, Zygotene
B) Zygotene, pachytene, leptotene
C) Diplotene, Zygotene, Pachytene
D) None of these
Q72.
A bivalent is
A) Pair of non-homologous chromosomes
B) The complex formed by a pair of synapsed homologous chromosomes.
C) Formed during pachytene statge
D) More clearly visible at zygotene Stage
Q73.
Synaptonemal complex dissolves during-
A) Leptotene
B) Diakinesis
C) Zygotene
D) Diplotene
Q74.
During which phase of meiosis centromere splits?
A) Anaphase I
B) Anaphase II
C) Telophase II
D) Telophase I
Q75.
Choose the correct option with respect to leptotene:
(i) It is the foremost and the short-lived stage of prophase
(ii) It begins when the process of compaction of chromosome is accomplished
(iii) chromosome become visible under light microscope
(iv) It followed by zygotene
A) One statement that is (ii) is incorrect
B) i, ii and iii are correct while (iv) is incorrect
C) iii & iv are correct while i, ii are incorrect
D) All statement are correct
Q76.
Zygotene is characterized by –
(i) chromosome start pairing
(ii) non-homologous chromosome paired
(iii) synapsis occurs between non-homologous chromosomes
(iv) formation of synaptomeal complex in homologous chromosomes
(v) formation of synaptonemal complex in non homologous chromosomes
A) i, ii, v
B) i, iii, iv
C) i, iv
D) i, ii, iii, v
Q77.
Bivalent stage is –
A) complex formed by a pair of synapsed homologous chromosomes
B) complex formed by a pair of synapsed non-homologous chromosomes
C) complex formed by four pair of synapsed homologous chromosomes
D) complex formed by four pair of synapsed non-homologous chromosomes
Q78.
Crossing over occurs in –
A) leptotene
B) zygotene
C) Pachytene
D) diplotene
Q79.
Pachytene is stage that is/are :-
A) long lived than zygotene
B) two chromatid of each bivalent chromosomes becomes distinct
C) short lived than leptotene
D) long lived than leptotene & short lived than zygotene
Q80.
Choose the correct statement from following:
A) Pachytene is characterised by appearance of recombination nodule
B) Recombination nodule is site of crossing over
C) Both A & B
D) Recombination nodule formed in diplotene
Q81.
Given below are statements (I - VI). Choose correct set with respect to crossing over.
I) It occurred between sister chromatid of homologous chromosomes.
II) It is enzyme mediated process.
III) Recombinase enzyme involved in it.
IV) It occurs at recombination nodules.
V) It occurs between non sister chromatid of non-homologous chromosomes.
VI) It occurs between sister chromatid of non-homologous chromosomes.
A) I, II, III & IV
B) V, II, III & IV
C) II, III, IV & VI
D) II, III & IV
Q82.
Diplotene is not characterized by
A) Dissolution of synaptonemal complex.
B) Tendency of recombined homologous chromosomes of tetrad to separate from each other, except at sites of crossover crossovers.
C) Formation of chiasmata
D) Tendency of recombined non homologous chromosome of bivalent to separate from each other, except at sites of crossover.
Q83.
Chiasmata is –
A) X – shaped structures
B) Formed by recombined chromosome yet to be separated
C) Site of cross over
D) All of these
Q84.
Which stage of Meiosis – I last for months or year in some vertebrate oocytes?
A) Diakinesis
B) Diplotene
C) Pachytene
D) Zygotene
Q85.
Diakinesis marked by –
A) Terminalisation of chiasmata
B) Chromosomes are fully condensed
C) Meiotic spindle assembled
D) All of these
Q86.
Meiotic spindle assembled to prepare –
A) Non homologous chromosome separation.
B) Formation of aster ray.
C) Homologous chromosome separation.
D) Both B & C
Q87.
Match the following
| Column I | Column II |
|---|
| I Leptotene | a Compaction of chromosome |
| II Zygotene | b Separation of chromosome except at crossover |
| III Pachytene | c Terminalisation of chiasmata |
| IV Diakinesis | d Appearance of recombination of nodules |
| V Diplotene | e Synapsis |
A) I-a, II-e, III-d, IV-c, V-b
B) I-a, II-b, III-d, IV-c, V-e
C) I-c, II-d, III-a, IV-e, V-b
D) None of these
Q88.
Identify stage
A) Homologous chromosome separate, while sister chromatid remain associated at centromere.
B) Homologous chromosome along with sister chromatid separate.
C) Spindle attached to Kinetochore in this stage.
D) This stage followed by diakinesis.
Q89.
Spindle fibre attach to kinetochores of homologous chromosome in –
A) Metaphase – I of meiosis
B) Metaphase – II of meiosis
C) Both A & B
D) Anaphase of mitosis
Q90.
Identify stage
a b
A) a = Anaphase I, b = Anaphase II
B) a = Anaphase II, b = Metaphase II
C) a = Anaphase II, b = Anaphase I
D) a = Anaphase I, b = Anaphase II
Q91.
Dyads of cells are formed in –
A) Telophase – I
B) Telophase – II
C) Diakinesis
D) Both A & B
Q92.
Meiosis – II initiated immediately after
A) Telophase – I
B) Prophase
C) Cytokinesis – I
D) Chromosome have fully elongated
Q93.
Which of the following resembles with normal mitosis-
A) Meiosis – I
B) Meiosis – II
C) Both
D) None of these
Q94.
In the beginning of Meiosis – II, a cell contain four chromatid. What number of chromatid is expected to be in each daughter cell at end of telophase – II
A) 4
B) 2
C) 8
D) 16
Q95.
Find mismatched column
| Column I | Column II |
|---|
| A Metaphase – II | Chromosomes align at equator and microtubule from opposite poles of spindle get attached to kinetochores of non-sister chromatid |
| B Prophase – II | Nuclear membrane disappear |
| C Telophase – II | Formation of tetrad of cells |
| D Anaphase – II | Splitting centromere which hold sister chromatid together, allow them to move toward opposite pole of cells |
Q96.
Movement of chromatid toward opposite pole is achieved by-
A) Shortening of microtubules attached to centromere
B) Shortening of microtubules attached to kinetochores
C) Elongating of microtubules attached to kinetochores
D) Elongating of microtubules attached to centromere
Q97.
Conservation of specific chromosome number of each species is achieved across generations in sexually reproducing organism is done by –
A) Mitosis
B) Meiosis only
C) Meiosis & Mitosis
D) None of these
Q98.
Choose the correct statement about meiosis
A) Increase genetic variability of an individual of an organism
B) decrease genetic variability of an organism from one generation to other
C) Reduction of chromosome by one-fourth
D) Play an important role in evolution