Q.1
Nuclear envelope disappears during ... ... [ MPPMT 1995 ]
  • a) Anaphase
  • b) Metaphase
  • c) Early prophase
  • d) Late prophase
Q.2
Homologous chromosomes separate during ... ... [ Odisha 2009 ]
  • a) Metaphase I
  • b) Anaphase I
  • c) Metaphase II
  • d) Anaphase II
Q.3
Cell division is initiated by ... ... [ AFMC 2000 ]
  • a) Cytokinin
  • b) Auxin
  • c) Gibberellin
  • d) ABA
Q.4
In meiosis, the daughter cells differ from parent cell as well as amongst themselves due to ... ..... [ AFMC 2005 ]
  • a) Segregation, independent assortment and crossing over
  • b) Segregation and crossing over
  • c) Independent assortment and crossing over
  • d) Segregation and independent assortment
Q.5
The stage of cell cycle when cell decides to undergone differentiation is ... .... [ JIPMER 1998 ]
  • a) G0
  • b) G1
  • c) G3
  • d) G4
Q.6
Kinetochore is ... ... [ Bih. PMT 2001 ]
  • a) Granule within centromere
  • b) Surface of centromere
  • c) Constriction near chromosome end
  • d) End of chromosome
Q.7
When are spindle fiber proteins synthesized ... ... [ Odisha 2004 ]
  • a) G1 -phase
  • b) G2 - phase
  • c) Metaphase
  • d) S -phase
Q.8
Paring of homologous chromosomes in zygotene is ... ... [ BHU 2003 ]
  • a) Synapse
  • b) Synapsis
  • c) Crossing over
  • d) Terminalisation
Q.9
Histone protein synthesis occurs during ... ... [ CBSE 2005 ]
  • a) G1-phase
  • b) G2 -phase
  • c) S-phase
  • d) Prophase
Q.10
Recombination between homologous chromosomes is completed by the end of ... ... [ CET Chd. 2009 ]
  • a) Pachytene
  • b) Leptotene
  • c) Diplotene
  • d) Zygotene
Q.11
Significance of meiosis lies in ... ... [ MPPMT 1995 ]
  • a) Production of genetic variability
  • b) Maintaining constancy of chromosome number during sexual reproduction
  • c) Reduction of chromosome number to one half
  • d) All the above
Q.12
Karyokinesis differs from cytokinesis as it involves division of ... ... [ AMU 1998 ]
  • a) Cytoplasm
  • b) Nucleus
  • c) Both nucleus and cytoplasm
  • d) Cell
Q.13
match the columns
I II
a) Initiation of spindle fibres i) Anaphase I
b) Synthesis of RNA and protein ii) Zygotene
c) Action of endonuclease iii) G1 -phase
d) Movement of chromatids towards opposite poles iv) Pachytene
- - v) Anaphase II
  • a) a - ii, b - iii, c - iv, d - v
  • b) a - iii, b - ii, c - i , d - v
  • c) a - i, b - iii, c - v, d - iv
  • d) a - i, b - iv, c - v, d - iii
Q.14
Second division of meiosis is ... ... [ KCET 1998 ]
  • a) Reductional division
  • b) Multiplied division
  • c) Equational division
  • d) None of the above
Q.15
During which phase(s) of cell cycle, amount of DNA in a cell remains at 4C level if the initial amount is denoted as 2C? ….[AIPMT 2014]
  • a) OnlyG2
  • b) G2 and M
  • c) G0 and G1
  • d) G1 and S
Q.16
In 'S' phase of the cell cycle: ….[AIPMT 2014]
  • a) chromosome number is increased.
  • b) amount of DNA is reduced to half in each cell.
  • c) amount of DNA doubles in each cell.
  • d) amount of DNA remains same in each cell
Q.17
The enzyme recombinase is required at which stage of meiosis: …[AIPMT 2014]
  • a) Diplotene
  • b) Diakinesis
  • c) Pachytene
  • d) Zygotene
Q.18
Select the correct option: …[AIPMT 2015]
I II
(a) Synapsis aligns homologous chromosomes (i)Anaphase-II
(b) Synthesis of RNA and protein (ii)Zygotene
(c) Action of enzyme recombinase (iii) G2-phase
(d)Centromeres do not separate but chromatids move towards opposite poles (iv)Anaphase-I
- -   - - (v)Pachytene
  • a) a → (ii); b → (iii); c → (iv) ; d → (v)
  • b) a → (ii) ; b → (i) ; c → (iii) ; d → (iv)
  • c) a →(ii) ; b → (iii); c → (v) ; d → (iv)
  • d) a →(i) ; b → (ii) ; c → (v) ; d → (iv)
Q.19
A somatic cell that has just completed the S phase of its cell cycle, as compared to gamete of the same species, has: …[AIPMT 2015]
  • a) four times the number of chromosomes and twice the amount of DNA
  • b) twice the number of chromosomes and twice the amount of DNA
  • c) same number of chromosomes but twice the amount of DNA
  • d) twice the number of chromosomes and four times the amount of DNA
Q.20
Spindle fibers attach on to :- …[AIPMT-2016]
  • a) Telomere of the chromosome
  • b) Kinetochore of the chromosome
  • c) Centromere of the chromosome
  • d) Kinetosome of the chromosome
Q.21
In meiosis crossing over is initiated at : …[AIPMT-2016]
  • a) Pachytene
  • b) Leptotene
  • c) Zygotene
  • d) Diplotene
Q.22
Which of the following is not a characteristic feature during mitosis in somatic cells ? …[AIPMT-2016]
  • a) Spindle fibers
  • b) Disappearance of nucleolus
  • c) Chromosome movement
  • d) Synapsis
Q.23
The complex formed by a pair of synapsed homologous chromosomes is called .. [NEET 2013]
  • a) Equatorial plate
  • b) Kinetochore
  • c) Bivalent
  • d) Axoneme
Q.24
Meiosis takes place in …[NEET 2013]
  • a) Meiocyte
  • b) Conidia
  • c) Gemmule
  • d) Megaspore
Q.25
A stage in cell division is shown in the figure. Select the answer which gives correct identification of the stage with its characteristics. ….[NEET 2013]
unit-3_ch-3_que_no-229_img_no1.png
  • a) Telophase → Nuclear envelop reforms, golgi complex reforms
  • b) Late Anaphase → Chromosomes move away from equatorial plate, golgi complex not present.
  • c) Cytokinesis → Cell plate formed,mitochondria distributed between two daughter cells.
  • d) Telophase → Endoplasmic reticulum and nucleolus not reformed yet.
Q.26
During cell growth, DNA synthesis takes place in:- …[NEET 2016]
  • a) G2 phase
  • b) M phase
  • c) S phase
  • d) G1 phase
Q.27
When cell has stalled DNA replication fork, which checkpoint should be predominantly activated? …[NEET 2016]
  • a) M
  • b) Both G2/M and M
  • c) G1/S
  • d) G2/M
Q.28
Match the stages of meiosis in Column–I to their characteristic features in Column–II and select the correct option using the codes given below : …[NEET 2016]
Column-I Column-II
a) Pachytene i) Pairing of homologouschromosomes
b) Metaphase-I ii) Terminalization of chiasmata
c) Diakinesis iii) Crossing over takes place
d) Zygotene iv) Chromosomes align at equatorial plate
  • a) a → ii; b→ iv; c→ iii; d→ i
  • b) a → iv; b→ iii; c→ ii; d→ i
  • c) a →iii; b→ iv; c→ ii; d→ i
  • d) a →i; b→ iv; c→ ii; d→ iii
Q.29
Which of the following options gives the correct sequence of events during mitosis? ….[NEET- 2017]
  • a) Condensation → nuclear membrane disassembly → crossing over → segregation → telophase
  • b) Condensation → nuclear membrane disassembly → arrangement at equator →centromere division → segregation → telophase
  • c) Condensation → crossing over → nuclear membrane disassembly → segregation → telophase
  • d) Condensation → arrangement at equator → centromere division → segregation →telophase
Q.30
Anaphase promoting complex (APC) is a protein degradation machinery necessary for proper mitosis of animal cells. If APC is defective in a human cell, which of the following is expected to occur? ….[NEET- 2017]
  • a) Chromosomes will not condense
  • b) Chromosomes will be fragmented
  • c) Chromosomes will not segregate
  • d) Recombination of chromosome arms will occur
0 h : 0 m : 1 s