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Neet Biology Cell Cycle, Cell Division Mcq
Quiz 6
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Q.1
A circle of vesicles appears at the equator of spindle towards the end of anaphase. It will form ... .....
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a) Cleavage furrow
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b) Phragmoplast
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c) Cell plate
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d) Middle lamella
Explanation
Answer : (c)
Q.2
Name the stage of mitosis in which chromosomes are arranged on the equator of spindle ... ... [ BHU 2006 ]
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a) Anaphase
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b) Metaphase
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c) Prophase
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d) Telophase
Explanation
Answer : (b)
Q.3
Identify two correct statements about meiosis A) Bead like structures absent on chromosomes B) Displacement of chiasmata occurs in diakinesis C) Separation of two basic sets of chromosomes No division of centromeres ... ......[ EAMCET 2008 ]
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a) B and D
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b) B and C
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c) C and D
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d) A and C
Explanation
Answer : (b)
Q.4
A diploid living organism develops from zygote by repeated ... ... [ JKCMEE 2005 ]
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a) Meiosis
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b) Mitosis
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c) Amitosis
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d) Segmentation
Explanation
Answer : (b)
Q.5
The four daughter cells produced at the end of meiosis are ... ... [ MPPMT 2001 ]
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a) Anucleate
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b) Polynucleate
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c) Genetically dissimilar
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d) Genetically similar
Explanation
Answer : (c)
Q.6
The major importance of meiosis lies in ... ... [ RPMT 1996 ]
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a) Development of mutations
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b) Sexual reproduction
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c) It transfers chromosomes through mitosis
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d) It maintains chromosome number generation after generation
Explanation
Answer : (d)
Q.7
In the beginning of meiosis, a meiocyte has 16 pg of DNA. the amount in a gamete will be ... ... [ Wardha 2003 ]
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a) 16 pg
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b) 8 pg
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c) 4 pg
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d) 32 pg
Explanation
initiation of meiosis meiosis has 16pg of DNA then go meiosis 1 then meiosis 2 At the end of meiosis 2 four haploid cell are formed Now 16pg at start, meiosis1= (8pg + 8pg ) and meiosis2 end four haploid cell form(4pg+4pg+4pg+4g) . Therefore DNA amount in gamet is 4pg Answer submitted by MANISH KUMAR Answer : (c)
Q.8
Mitotic anaphase differs from metaphase in possessing ... ... [ CBSE 1991 ]
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a) Same number of chromosomes and same number of chromatids
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b) Half number of chromosomes and half number of chromatids
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c) Half number of chromosomes and same number of chromatids
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d) Same number of chromosomes and half number of chromatids
Explanation
Answer : (d)
Q.9
Fibroblast cells in our body are those that are arrested in ... ...
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a) G0 - phase
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b) G1 - phase
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c) G2 - phase
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d) Yet to start division
Explanation
Answer : (b)
Q.10
Beads on string of a are seen in b which condense to form chromosomes in c stage of cell division ... ..[ AIIMS 2012 ]
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a) aChromonema b Chromatin c Metaphase
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b) aChromatin b Chromatid c Metaphase
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c) aChromonema b Chromosome c Anaphase
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d) aChromonema b Chromatid c Anaphase
Explanation
Answer : (a)
Q.11
In mitosis, the number of chromosomes ... ... [ CPMT 2003 ]
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a) Become double
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b) Become half
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c) Remain unchanged
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d) None of the above
Explanation
Answer : (c)
Q.12
Cell Lineage " all cells are derived from pre-existing cells" is the famous generalization of ... .... [ AFMC 1997 ]
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a) Virchow
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b) Schleiden
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c) Schwann
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d) Lamarck
Explanation
Answer : (a)
Q.13
A stage in mitosis that begins in mid-anaphase and completed with telophase is ... ... [ AFMC 2012 ]
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a) Crossing over
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b) Karyokinesis
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c) Cytokinesis
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d) Interkinesis
Explanation
A) Karyokinesis (Karyon – nucleus, kinesis – movement): It is the division of nuclear material. It occurs in four stages as follows: i) Prophase (Gr. Pro – before, phases – appearance) ii) Metaphase (Meta – after, phase – appearance) iii) Anaphase (ana – up, phases - appearance) iv) Telophase (Telo – end, phases – appearance) B) Cytokinesis (cyto – cell, kinesis – movement) It is the division of cytoplasm. A cleavage furrow develops in the middle of the cell in centripetal direction due to the contraction of microtubules. It occurs till the edges of the plasma membrane meet. They fuse to form a separate membrane. In plant cell, the cytokinesis occurs due to the formation of phragmoplast in centrifugal direction. The phragmoplast is formed by golgicomplex, ER and pectin containing vesicles. Answer : (b)
Q.14
Condensation of chromosome with visible centromere occurs during .. .... [ MPPMT 1994 ]
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a) G1 -phase
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b) G2 -phase
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c) S -phase
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d) M -phase
Explanation
Answer : (d)
Q.15
Meiosis II performs ... ... [ CBSE 1993 ]
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a) Separation of sex chromosomes
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b) Synthesis of DNA and centromere
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c) Separation of homologous chromosomes
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d) Separation of chromatids
Explanation
Answer : (d)
Q.16
In pachytene stage of meiosis, the individual chromosomes appear .... ... [ BHU 2002 ]
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a) Single stranded
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b) Double stranded
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c) Three stranded
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d) Four stranded
Explanation
During pachytene stage, the four chromatids of each bivalent chromosomes becomes distinct and clearly appears as tetrads. At pachytene chromosomes pair pair, the corresponding portions of the two chromosomes lying side by side. The chromosomes then duplicate and contract into paired chromatids. At this stage the pair of chromosomes is known as a tetrad, as it consists of four chromatids. Answer : (d)
Q.17
Chiasmata are first seen in ... ... [ DPMT 2002 ]
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a) Leptotene
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b) Zygotene
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c) Pachytene
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d) Diplotene
Explanation
Answer : (d)
Q.18
Repulsion of homologous chromosomes begins during ... ... [ MPPMT 2001 ]
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a) Diakinesis
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b) Diplotene
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c) Zygotene
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d) Leptotene
Explanation
Answer : (b)
Q.19
Which type of coiling occurs in chromosomes? [ RPMT 2005 ]
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a) Plectonemic
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b) Paranemic
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c) Orthostichous
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d) Anorthospiral
Explanation
Answer : (a)
Q.20
Longest phase of meiosis is ... ... [ BHU 2008 ]
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a) Prophase I
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b) Prophase II
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c) Anaphase I
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d) Metaphase II
Explanation
Answer : (a)
Q.21
The term meiosis was coined by ... ... [ BHU 1992 ]
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a) Farmer and Moore
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b) Fleming
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c) Blackman
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d) Robertson
Explanation
Answer : (a)
Q.22
Astral rays arise from ... ... [ AMU 2005 ]
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a) Centriole
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b) Cytoplasm
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c) Chromatid
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d) Centromere
Explanation
Answer : (a)
Q.23
Mitosis is absent in ... .. [ RPMT 1995 ]
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a) Zygote
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b) Germinal cell
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c) Bone cell
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d) None of the above
Explanation
Answer : (b)
Q.24
Post mitotic gap phase and synthetic phase refer to ... ... [ AMU 2003 ]
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a) G2 and M
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b) G1 anad S
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c) G2 and S
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d) S and G1
Explanation
Answer : (b)
Q.25
Meiotic division occurring just at the time of gametogenesis is ... ... [ AMU1992 ]
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a) Sporic
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b) Initial
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c) Intermediate
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d) Terminal
Explanation
Answer : (d)
Q.26
Meiosis occurs in ... ... [ CMC 2002 ]
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a) Embryo sac
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b) Megaspore
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c) Megaspore mother cell
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d) Nucellus
Explanation
Answer : (c)
Q.27
Syncytium formation takes place if ... ... [ AMU 2011 ]
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a) Cytokinesis is not followed by karyokinesis
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b) Karyokinesis does not occur
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c) Karyokinesis is not followed by cytokinesis
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d) Both karyokinesis and cytokinesis are prevented
Explanation
Answer : (c)
Q.28
Colchicine arrests mitosis at .... ... [ AFMC 2002 ]
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a) Prophase
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b) Metaphase
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c) Anaphase
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d) interphase
Explanation
Answer : (b)
Q.29
Chemical for arresting cell division is extracted from ... ... [ Bih PMT 2002 ]
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a) Crocus
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b) Colchicum
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c) Chrysanthemum
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d) Dalbergia
Explanation
Answer : (b)
Q.30
"Post-mitotic phase" of the cell in which active synthesis of RNA and proteins takes place is ... .. [ KCET 2003 ]
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a) S-phase
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b) Amitotic phase
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c) G2 -phase
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d) G1 -phase
Explanation
Answer : (d)
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