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Quiz 5
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Q.1
Four daughter cells formed during meiosis differ from each other due to ... ... [ BHU 2001 ]
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a) Number of chromosomes
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b) Crossing over
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c) Independent assortment of chromosomes
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d) Both B and C
Explanation
Answer : (d)
Q.2
Which is synthesised in G1- phase? ... ... [ CPMT 2004 ]
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a) DNA polymerase
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b) Histones
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c) Nucleolar DNA
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d) Tubulin proteins
Explanation
Answer : (a)
Q.3
In synapsis, two homologous chromosomes are connected at ... ... [ RPMT 1998 ]
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a) Centromeres
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b) Chromomeres
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c) Telomeres
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d) None of the above
Explanation
Synapsis is the pairing of two homologous chromosomes that occurs during meiosis A chromomere is one of the serially aligned beads or granules of an eukaryotic chromosome, resulting from local coiling of a continuous DNA thread. The chromomeres of homologs align with each other to form homologous rough pairing (homology searching). These chromomeres helps provide a unique identity for each homologous pairs. Chromomeres in corresponding positions on homologous chromosomes pair during meiosis in many organisms. Answer : (b)
Q.4
Nuclear envelop reappears at .... ... [ CBSE 1997 ]
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a) Metaphase
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b) Anaphase
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c) Cytokinesis
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d) Telophase
Explanation
Answer : (d)
Q.5
During meiosis, replication of chromosomes occurs in ... ... [ RPMT 2000 ]
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a) S -phase
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b) S -phase and zygotene
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c) S - phase and leptotene
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d) All the above
Explanation
S phase. DNA synthesis replicates the genetic material. Each chromosome now consists of two sister chromatids. During the Zygotene stage, condensation continues to make distinguishable Chromosomes Answer : (b)
Q.6
Meiosis is evolutionary significant because it results in ... ... [ CBSE 1994 ]
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a) Genetically similar daughters
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b) Four daughter cells
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c) Eggs and sperms
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d) Recombination
Explanation
Answer : (d)
Q.7
Pick up the correct statement: a) Synapsis of homologous chromosomes occurs during prophase I b) Division of centromeres takes place during anaphase I c) Spindle fibers disappear completely in telophase of mitosis d) Nucleoli may reappear in telophase I
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a) a only
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b) c only
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c) a and b only
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d) a, c and d only
Explanation
Answer : (d)
Q.8
In metaphase I chromosomes are in ... ... [ RPMT 2002]
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a) Tetrad stage
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b) Dyad stage
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c) Diploid nature
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d) Attract each other
Explanation
Answer : (a)
Q.9
G1 stage of interphase of cell cycle shows ... .. [ BHU 2005 ]
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a) Active synthesis of DNA
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b) Active synthesis of RNA
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c) Active synthesis of protein
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d) Both B nad C
Explanation
Answer : (d)
Q.10
In which stage of meiosis the structure, number and shape of chromosomes can be observed ... ... [ RPMT 2006 ]
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a) Prophase I
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b) Metaphase I
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c) Anaphase I
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d) Telophase I
Explanation
Answer : (b)
Q.11
What is true of mitosis? [ Manipal 2002 ]
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a) It has two divisions
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b) It maintains number of chromosomes
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c) It occurs in somatic cells only
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d) It occurs in somatic cells as well as gonads
Explanation
Answer : (c)
Q.12
What is the stage of mitosis when chromosomes separate and move towards poles? ... .... [ BHU 2002 ]
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a) Prophase
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b) Metaphase
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c) Anaphase
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d) Telophase
Explanation
Answer : (c)
Q.13
If a cell possesses twice as much DNA as in the functional cell, the cell ... ... [ KCET 2005 ]
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a) Is preparing to divide
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b) Has completed division
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c) Has ceased to function
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d) Has reached end of its life span
Explanation
Answer : (a)
Q.14
Synaptonemal complex is site of ... ... [ BHU 2012 ]
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a) Spindle attachment
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b) Replication
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c) Chromatid separation
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d) Chromosome alignment and recombination
Explanation
Answer : (d)
Q.15
Part of spindle left after chromosomes have moved to poles is ... .. [ CPMT 2000 ]
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a) Centrosome
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b) Centriole
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c) chromocenter
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d) Phragmoplast
Explanation
Answer : (d)
Q.16
During prophase, chromosomes are ... .. [ JIPMER 1998 ]
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a) Large and coiled
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b) Large and straight
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c) Thick and uncoiled
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d) Thick and straight
Explanation
Answer : (a)
Q.17
In G2 - phase, DNA content is ... ... [ Wardha 2005 ]
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a) 2n
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b) n
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c) 3n
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d) 4n
Explanation
Answer : (d)
Q.18
How many mitotic divisions occur in a cell to produce 256 daughter/somatic cells ... ... [ MPPMT 1989 ]
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a) 128
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b) 64
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c) 32
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d) 8
Explanation
Answer : (d)
Q.19
Endomitosis is ... ... [ RPMT 1998 ]
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a) Mitosis without nucleus
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b) Mitosis within nucleus
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c) Frequent mitosis
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d) Mitosis is uterine wall
Explanation
Answer : (b)
Q.20
Meiosis is best seen in ... ... [ WB 2008 ]
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a) Microsporangium
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b) Pollen grain
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c) Gamete
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d) Anther wall
Explanation
Answer : (a)
Q.21
Crossing over takes place in ... ... [ Odisha 2009 ]
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a) Prophase
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b) Metaphase
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c) Anaphase
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d) Prophase I
Explanation
Answer : (d)
Q.22
Crossing over occurs between ... .. [ DPMT 2003 ]
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a) Sister chromatids
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b) Non-sister chromatids
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c) homologous non-sister chromatids
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d) Any two chromosomes
Explanation
Crossing over occurs between prophase I and metaphase I and is the process where two homologous non-sister chromatids pair up with each other and exchange different segments of genetic material to form two recombinant chromosome sister chromatids Answer : (c)
Q.23
Plane of cell wall formation in a dividing cell is determined by ... ... [ JKCET 2012]
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a) Microfilaments
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b) Microtubules
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c) Golgi apparatus
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d) Endoplasmic reticulum
Explanation
Answer : (b)
Q.24
Spindle fibers are formed of ... .. [ BHU 2006 ]
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a) Tubulin
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b) Fibrin
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c) Flagellin
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d) Actin
Explanation
Answer : (a)
Q.25
In meiosis disjunction of chromosomes occurs during ... ... [ EAMCET 2001 ]
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a) Metaphase I
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b) Anaphase I
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c) Metaphase II
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d) Anaphase II
Explanation
Answer : (b)
Q.26
In mitotic metaphase, each chromosome is ... ... [ RPMT 1996 ]
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a) One
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b) Two
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c) Three
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d) Four
Explanation
Answer : (b)
Q.27
Stage connecting meiosis I and meiosis II is ... ... [ AFMC 2002 ]
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a) Interphase I
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b) Interphase II
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c) Interkinesis
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d) Anaphase I
Explanation
Answer : (c)
Q.28
In meiosis chromosome number becomes ... .. [ CPMT 2007 ]
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a) One half of parent cell
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b) Same as parent cell
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c) One-fourth of parent cell
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d) Double of parent cell
Explanation
Answer : (a)
Q.29
Which one is connected with cell division? ... ... [ CMC 2002 ]
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a) ER
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b) Peroxisomes
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c) Ribosomes
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d) Microtubules
Explanation
Answer : (d)
Q.30
Stages in proper sequence of Prophase I are ... ... [ BHU 1997 ]
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a) Zygotene, Leptotene, Pachytene, Diakinesis and Diplotene
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b) Leptotene, Zygotene, Pachytene, Diplotene and Diakinesis
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c) Leptotene, Pachytene, Zygotene, Diakinesis and Diplotene
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d) Diplotene, Diakinesis, Pachytene, Zygotene and Leptotene
Explanation
Answer : (b)
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