NEET Biology Ch Cell Cycle and Cell Division – Questions
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- The second meiotic division leads to
a) Separation of sex chromosomes
b) Fresh DNA synthesis
c) Separation of chromatids and centromere
d) Separation of homologous chromosomes - In meiosis, chromosome number becomes
a) Half of its parent chromosome
b) Same as that of parent chromosome
c) One fourth of its parent chromosome
d) None of the above - Consider the following statements about plant cytokinesis
I. It usually occurs by cell plate method
II. The spindle usually persists during cytokinesis
III. Cell plate grows centrifugally
Which of the statements given above are correct?
a) I and II b) I and III c) II and III d) I, II and III - I. …A… phase corresponds to the interval between mitosis and initiation of DNA replication
II. In animal cells, during the …B… phase, DNA replication begins in the nucleus and the centriole
duplicates in the cytoplasm
III. During the …C… phase, proteins are synthesized for the preparation of mitosis, while cell growth
continues
Identify the blanks (A-C) to complete the given statements (I-III) with reference to NCERT textbook
a) A-G2, B-S, C-G1 b) A-S, B-G2, C-G1 c) A-S, B-G1, C-G2 d) A-G1, B-S, C-G2 - Select the matched ones.
I . S-phase – DNA replication
II. Zygotene – Synapsis
III. Diplotene – Crossing over
IV. Meiosis – Both haploid and diploid cells
V 𝐺2-phase – Quiescent stage
a) I and II only b) III and IV only c) III and V only d) I,III and V only - Which type of cell division helps in regeneration of cells?
a) Mitosis b) Amitosis c) Meiosis d) Karyokinesis - Which of the following statement(s) is/are not correct about meiosis?
I. Meiosis involves pairing of homologous chromosomes and recombination between them
II. Two diploid cells are formed at the end of meiosis-II
III. Meiosis involves two sequential cycles of nuclear and cell division called meiosis-I and meiosis-II, but
only a single cycle of DNA replication
IV. Meiosis-I is initiated after the parental chromosome replication which produce identical sister
chromatids at the S-phase
The correct option is
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a) I and III b) II only c) II and III d) I, II, III and IV
- Choose the correct statements regarding cell cycle
I. Interphase is called the resting phase
II. Interphase is the time during which the cell is preparing for division
III. The interphase is divided into phases, 𝑖.𝑒.,G1, S and G2-phase
IV. Interphase represents the phase between the two successive M-phases
The option with correct statements is
a) I and IV b) II and III c) I and III d) I, II, III and IV - Crossing over occurs during
a) Leptotene b) Diplotene c) Pachytene d) Zygotene - During meiosis, the alleles of the parental pair separate or segregated from each other. How many allele(s)
is/are then transmitted to a gamete?
a) Four b) Two c) Six d) One - The phragmoplast is organized at the
a) Beginning of anaphase
b) End of anaphase
c) Beginning of telophase
d) End of telophase - The morphology of chromosomes can be studied most easily in
a) Prophase b) Metaphase c) Anaphase d) Telophase - Identify the correct stage of mitosis by viewing the diagram carefully? a) Interphase b) Prophase c) Metaphase d) Anaphase
- The number of chromosomes becomes half in
a) Anaphase-I b) Anaphase-II c) Telpohase-I d) Telophase-II - In which of the following phase of cell cycle, mitotic division got arrested?
a) G2-phase b) G0-phase c) S-phase d) M-phase - Which of the following phase of cell cycle is also known as the resting phase?
a) G1-phase b) M-phase c) S-phase d) Interphase - Differentiated cell remains at which stage?
a) G1 b) G2 c) G0 d) M - The process of cytokinesis refers to the division of
a) Nucleus b) Chromosomes c) Cytoplasm d) None of these - Choose the correct combination of options to select the correct statement for prophase
I. Chromosomal material condenses to form compact mitotic chromosomes
II. The assembly of mitotic spindle is initiated by the microtubules
III. Cells do not show organelles when viewed under the prophase
IV. The nucleolus or nucleoli degenerate completely
a) I only b) II and III c) I and II d) All of these - Which of the following event distinguishes prophase-I of meiosis from prophase of mitosis?
a) Nuclear membrane breaks down b) Chromosomes become visible
c) Homologous chromosomes pair up d) Spindle forms - During mitosis, number of chromosomes gets
a) Change
b) No change
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c) May be change if cell is mature
d) May be change if cell is immature
- I. Chromosomes cluster at opposite spindle poles their identity is lost as discrete elements
II. Nuclear envelope assembles around the chromosome clusters
III. Nucleolus, Golgi complex and ER reform
Above features indicates which phase of mitosis
a) Anaphase b) Telophase c) Cytokinesis d) S-phase - What would be the change in the chromosome number, during S-phase?
a) No change
b) The number of chromosome doubles
c) The number of chromosome doubles only in case of diploid cell
d) The number of chromosome doubles only in case of haploid cell - Arrange the following events of meiosis in a correct sequence and choose the correct option
I. Terminalisation
II. Crossing over
III. Synapsis
IV. Disjunction of genomes
a) IV, III, II and I b) III, II, I and IV c) II, I, IV and III d) I, IV, III and II - What is the approximate percentage duration of cell cycle that comes under interphase in humans?
a) 99% b) 95% c) 25% d) 5% - Which of the following stage of meiosis is responsible for deciding genetic constitution of gametes?
a) Metaphase-II b) Anaphase-II c) Metaphase-I d) Anaphase-I - …A…. mitotic cell division is only seen in the diploid somatic cells, while the …B… can show mitotic
divisions in both haploid and diploid cells.
Identify A and B form the options given below
a) A-Animals; B-plants b) A-Plants; B-animals c) A-Bacterial; B-viruses d) None of these - Given diagram indicates which of the following phase of mitosis? Choose the correct option a) Interphase b) Prophase c) Metaphase d) Anaphase
- In meiosis, the chromosome number
a) Reduces by half b) Increase by twice
c) Increase by four times d) Reduces by one-fourth - The phase between two successive M-phase is called
a) S-phase b) G1-phase c) G2-phase d) Interphase - At the end of meiosis-II, number of haploid cells formed are
a) Two b) Four c) Eight d) None of these - The transition between meiosis-I and meiosis-II is
a) Interkinesis b) Cytokinesis c) Diakinesis d) Karyokinesis - Synapsis occurs between
a) A male and a female gamete
b) mRNA and ribosomes
c) Spindle fibres and centromere
d) Two homologous chromosomes
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- In which stage of cell division, chromosomes are most condensed?
a) Prophase b) Metaphase c) Anaphase d) Telophase - Which of the protein is found in spindle fibre?
a) Tubulin b) Albumin c) Mucin d) Haemoglobin - Which of the following events occurs during G1-phase?
a) DNA replication
b) Growth and normal function of cell
c) Mutation
d) Fertilization - Select the correct statements regarding S-phase of interphase
I. Occurs between G1 and G2
II. DNA replication begins in the nucleus
III. Centrioles duplicate in the cytoplasm
IV. As DNA is doubled, number of chromosomes also doubles
The option with correct statements is
a) IV and III b) I, II, III and IV c) II, III and IV d) I, II and III - A material, which arrests cell division, is obtained from
a) 𝐶𝑟𝑜𝑐𝑢𝑠 b) 𝐶𝑜𝑙𝑐ℎ𝑖𝑐𝑢𝑚 c) 𝐷𝑎𝑙𝑏𝑒𝑟𝑔𝑖𝑎 d) 𝐶ℎ𝑟𝑦𝑠𝑎𝑛𝑡ℎ𝑒𝑚𝑢𝑚 - During cell division, sometimes there will be failure of separation of sister chromatids. This event is called
a) Interference b) Complementation c) Non-disjunction d) Coincidence - I. The cells that do not divide further, exit G1-phase to enter an inactive stage called …A… phase of the cell
cycle
II. The cells that are in G2-phase definitely continue with the …B… phase.
Identify A and B to complete the given NCERT statements
a) A-G0; B-S b) A-S; B-G0 c) A-M; B-G0 d) A-G0; B-M - Which type of chromosomes segregate when a cell undergoes meiosis?
a) Homologous chromosomes
b) Non- homologous chromosomes
c) Both (a) and (b)
d) Centric and acentric chromosomes - Term ‘meiosis’ was proposed by
a) Farmer and Moore b) Flemming c) Strasburger d) Darlington - Meiosis can be observed in
a) tapetal cells
b) Megaspores
c) Micropores
d) Spore mother cells - Crossing over that results in genetic recombination in higher organisms occurs between
a) Sister chromatids of bivalent
b) Non-Sister chromatids of a bivalent
c) Two daughter nuclei
d) Two different bivalents - In which of the following stage of the cell cycle, the attachment of spindle fibres to kinetochores of
chromosomes occurs?
a) Prophase b) Metaphase c) Anaphase d) Telophase - The sequence of events by which a cell duplicates its genome, synthesizes the other constituents of the cell
and eventually divides into two daughter cells is termed as
a) Cell division b) Cell cycle c) Cell growth d) Cell duplication - In animal cell has, cytokinesis involves
a) The separation of sister chromatids
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b) The contraction of the contractile ring of micro filament
c) Depolymerization of kinetochore microtubules
d) A protein kinase that phosphorylaes other enzymes
- Which is correct for meiotic metaphase-I?
a) Bivalents are arranged at equator
b) Univalents are arranged at equator
c) Non-homologous chromosomes forms pair
d) Spindle fibres are attached at chromomere - Crossing over is the exchange of genetic material between
a) Non-sister chromatids of the homologous chromosomes
b) Sister chromatids of the homologous chromosome
c) Chromatids of non-homologous chromosomes
d) The genes those are completely linked - Which of the following phase of the cell cycle is not a part of interphase?
a) S b) M c) G0 d) G1 - Colchicine arrests which of the following stage of cell division?
a) Prophase b) Anaphase c) Telophase d) Metaphase - Select the correct option with respect to mitosis.
a) Chromatids start moving towards opposite poles in telophase
b) Golgi complex and endoplasmic reticulum are still visible at the end of prophase
c) Chromosomes move to the spindle equator and get aligned along equatorial plate in metaphase
d) Chromatids separate but remains in the centre of the cell in anaphase - Small disc-shaped structures at the surface of the centromeres that appear during metaphase are
a) Kinetochores b) Metaphase plate c) Spindle fibres d) Chromatid - Cell division can not be stopped in which phase of the cell cycle?
a) G1-phase b) G2-phase c) S-phase d) Prophase - Meiosis in AaBb will produce gametes
a) AB, aB, Ab, ab b) AB, ab c) Aa, bb d) Aa, Bb - The stage between two meiotic division is called
a) Interphase b) Cytokinesis c) Interkinesis d) Karyokinesis - If we ignore the effect of crossing over, how many different haploid cells arise by meiosis in a diploid cell
having 2𝑛=12?
a) 8 b) 16 c) 32 d) 64 - Which of the following CdKs and cyclins comes under G1 check point?
a) CdK4/ Cyclin D b) CdK6/ Cyclin D c) Both (a) and (b) d) CdK2/ Cyclin B - Crossing over occurs at
a) Single strand stage
b) Two strand stage
c) Four strand stage
d) Eight strand stage - Chromosome number can be doubled by using which of the following?
a) Indole acetic acid
b) GA
c) Zeatin
d) Colchicines - Dictyotene a is prolonged
a) Leptotene b) Pachytene c) Diplotene d) Zygotene - Which of the following is unique to mitosis and not a part of meiosis?
a) Homologous chromosomes behave independently
b) Chromatids are separated during anaphase
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c) Homologous chromosomes pair and form bivalents
d) Homologous chromosomes crossover
- Spindle fibre is made up of
a) Humulin
b) Intermediate filament
c) Flagellin
d) Tubulin - There are three genes 𝑎,𝑏,𝑐 with percentage of crossing over between 𝑎 and 𝑏 is 20%, 𝑏 and 𝑐 is 28% and
�
� and 𝑐 is 8%. What is the sequence of genes on chromosome?
a) 𝑏,𝑎,𝑐 b) 𝑎,𝑏,𝑐 c) 𝑎,𝑐,𝑏 d) None of these - See the diagrams carefully and identify the different stages of mitosis (𝐴−𝐶) by choosing appropriate
options given below a) A-Metaphase; B-Telophase; C-Interphase
b) A-Telophase; B-Metaphase; C-Prophase
c) A-Anaphase; B-Telophase; C-Interphase
d) A-Telophase; B-Anaphase; C-Prophase - During which stage of meiosis, do tetrads line up at the equator?
a) Prophase-I b) Telophase-I c) Metaphase-I d) Anaphase-I - The anaphase promoting complex is activated by
a) M cdk cyclin b) G1 cdk cyclin c) S cdk cyclin d) Transaction factor - A cell plate is laid down during
a) Cytokinesis
b) Karyokinesis
c) Interphase
d) None of these - During which stage of meiosis, do the sister chromatids begin to move towards the poles?
a) Prophase-I b) Telophase-I c) Anaphase-II d) Anaphase-I - In a cell cycle, which structures serves as the site of attachment of spindle fibres?
a) Chromosomes b) Histone c) Chromonemeta d) Kinetochore - Identify the diagram and name the phase of meiosis carefully a) Telophase-I b) Anaphase-I c) Metaphase-I d) Prophase-I
- Which of the following serves as mitotic spindle poison?
a) Ca2+ b) Mg2+ c) Tubulin d) Colchicine - Chromosomes are visible with chromatids at which phase of mitosis?
a) Interphase b) Prophase c) Metaphase d) Anaphase - RNA and proteins are formed in
a) G1-phase b) G2-phase c) S-phase d) G0-phase - Give the name of the phases of meiosis, in which
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I. the chromosome number is reduced to haploid state
II. the amount of DNA is reduced to haploid state
The correct option is
a) Anaphase-II; anaphase-I
b) Anaphase-I, metaphase-II
c) Anaphase-I, anaphase-II
d) Anaphase-II, metaphase-I
- What type of cell division takes place in the functional megaspore initially in angiosperms?
a) Homeotypic without cytokinesis
b) Reductional without cytokinesis
c) Somatic followed by cytokinesis
d) Meiotic followed by cytokinesis - Which of the following statements are correct for multicellular cell division?
I. Cell division brings about embryonic development and growth
II. It plays a role in repair and maintenance of the body
III. It is important for reproduction
The correct option is
a) Only I b) I and III c) Only II d) I, II and III - Meiosis involves two sequential cycles of …A… called meiosis-I and meiosis-II but only a single cycle of
…B…
Identify A and B to complete the given statement
a) A-nuclear and cell division, B-DNA replication b) A-cell division, B-DNA replication
c) A-DNA replication, B-cell division d) A-nuclear division, B-DNA replication - During, meiosis-I, the bivalent chromosomes clearly appear as tetrads during
a) Diakinesis b) Diplotene c) Leptotene d) Pachytene - DNA replicates
a) Twice in each cell cycle
b) Only once in each cell cycle
c) Once in mitotic cell cycle, once in meiotic-I (reductional division) and once in meiotic-II (equational
division)
d) None of the above - Select the correct sequence of a cell cycle
a) G2→M→G1→S b) S→G2→M→G1
c) G1→S→G2→M d) M→G1→G2→M - Which of the following statements are correct for meiosis?
I. Meiosis is a double division. It gives rise to four cells
II. The cells undergoing meiosis may be haploid or diploid
III. No bouquet stage is recorded
IV. Pairing or synapsis of homologous chromosomes takes place during zygotene of prophase-I and
continues upto metaphase-I
Option containing correct statement is
a) I only b) I and IV c) II and III d) All of these - Mature nerve cells are incapable of cell division. These cell are probably considered in
a) G2-phase b) S-phase c) Mitosis d) G0-phase - Mitosis or the equational division is usually restricted to …A… cells. However, in some lower plants and in
some social insects …B… cells also divide by mitosis.
Choose the correct option for A and B from the given options
A B
a) Haploid; diploid b) Haploid; haploid c) Diploid; diploid d) Diploid; haploid - The spindles are formed of
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a) Chromosome b) Actin c) Microtubules d) Myosin
- During mitosis, ER and nucleolus begin to disappear at
a) Late prophase b) Early metaphase c) Late metaphase d) Early prophase - The plane of alignment of chromosome at the metaphase stage of cell cycle is referred to as the
a) Prophase plate b) Metaphase plate c) Anaphase plate d) Telophase plate - From the following, identify the two correct statements with reference to meiosis
I. Bead-like structures are absent on chromosomes
II. Displacement of chiasmata occurs in diakinesis
III. Separation of two basic sets of chromosomes
IV. No division of centromere
The correct option is
a) II and III b) II and IV c) III and IV d) I and III - Consider the following statements about colchicine
I. It is an alkaloid widely used in plant breeding for doubling the chromosome number
II. Colchicine induced polyploidy has been used in raising several varieties of horticulture and agricultural
plants
Which of the statements given above is/are correct?
a) Only I b) Only II c) Both I and II d) None of these - Separation of linked genes is called
a) Linkage b) Segregation c) Crossing over d) Genetic mutation - Sequence of four phases of cell cycle is
a) G1 →S →G2→M
b) G1 →G2 →S→M
c) S→G1 →G2→M
d) M→G1 →G2→S - The division of the cytoplasm is termed as
a) Karyokinesis b) Mitosis c) Cytokinesis d) Meiosis - Cell would normally proceed to mitosis without interruption
a) Once it had started the S-period
b) Once it had entered the G2-phase
c) At anytime during cell division
d) None of the above - The two chromatids of a metaphase chromosome represent
a) Replicated chromosomes to be separated at anaphase
b) Homologous chromosomes of a diploid set
c) Non-homologous chromosomes joined at the centromere
d) Maternal and paternal chromosomes joined at the centromere - In the process of mitotic division during interphase, chromosome material remains in the form of very
loosely coiled threads called
a) Chromosome b) Chromatin c) Chromatid d) Microtubules - Which is synthesized in G1-phase?
a) DNA polymerase b) Histones c) Nucleolar DNA d) Tubulin protein - Which of the following occurs more than one and less than five in a chromosome?
a) Chromatid b) Chromomere c) Centromere d) Telomere - Longest phase of meiosis, is
a) Prophase-I b) Prophase-II c) Anaphase-I d) Metaphase-II - Mitotic stages are not observed in
a) 𝐶𝑜𝑠𝑚𝑎𝑟𝑖𝑢𝑚 b) 𝐸.𝑐𝑜𝑙𝑖 c) 𝑆𝑎𝑐𝑐ℎ𝑎𝑟𝑜𝑚𝑦𝑐𝑒𝑠 d) 𝐶ℎ𝑙𝑜𝑟𝑒𝑙𝑙𝑎 - Crossing over is also an enzyme mediated process and the enzyme involved is called
a) Ligase b) Polymerase c) Recombinase d) Endonuclease
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