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Cell Cycle and Cell Division Class 11 MCQs Questions with Answers
Question 1.
Meiosis is evolutionary significant because it result in
(a) genetically similar daughters
(b) four daughter cells
(c) eggs and sperms
(d) recombinations
Answer
Answer: (d) recombinations
Question 2.
Synapsis occurs between
(a) A male and female gametes
(b) Ribosome and m-RNA
(c) Spindle fibres and centromeres
(d) Two homologous chromosomes
Answer
Answer: (d) Two homologous chromosomes
Question 3.
Division of nucleus without being followed by cytokinesis results into
(a) Phargmoplast
(b) Polyploidy
(c) Uninucleate condition
(d) Multinucleate condition
Answer
Answer: (d) Multinucleate condition
Question 4.
A cell plate is laid down during
(a) Cytokinesis
(b) Interphase
(c) Karyokinesis
(d) None of these
Answer
Answer: (a) Cytokinesis
Question 5.
Crossing over results the exchange of genetic material, which occurs between
(a) Non-sister chromosomes
(b) Sister chromatids
(c) Non-homologous chromosome
(d) Homologous chromosomes
Answer
Answer: (d) Homologous chromosomes
Question 6.
The number of chromosome and the amount of DNA are changed in
(a) Metaphase and M phase
(b) Anaphase and S phase
(c) Interphase and S phase
(d) None of these
Answer
Answer: (b) Anaphase and S phase
Question 7.
Which of the following statements is not true for cancer cells in relation to mutations?
(a) Mutations in proto-oncogenes accelerate the cell cycle.
(b) Mutations destroy telomerase inhibitor.
(c) Mutations inactive the cell control.
(d) Mutations inhibit production of telomerase.
Answer
Answer: (d) Mutations inhibit production of telomerase.
Question 8.
In cell cycle, DNA replication takes place in
(a) G1 phase
(b) G2 phase
(c) Mitotic metaphase
(d) S phase
Answer
Answer: (d) S phase
Question 9.
Which of the phases of mitosis is the longest?
(a) Telophase
(b) Prophase
(c) Anaphase
(d) Metaphase
Answer
Answer: (b) Prophase
Question 10.
Chromosome appeared beaded during
(a) Diplotene
(b) Leptotene
(c) Diakinesis
(d) Panchytene
Answer
Answer: (b) Leptotene
Question 11.
In meiosis crossing over is initiated at
(a) Pachytene
(b) Leptotene
(c) Zygotene
(d) Diplotene
Answer
Answer: (a) Pachytene
Question 12.
Which one is not a significance of meiosis division?
(a) Formation of spores and gametes
(b) New recombination of genes
(c) Number of chromosome remain same
(d) Number of chromosome reduced to half
Answer
Answer: (c) Number of chromosome remain same
Question 13.
A somatic cell that has just completed the S phase of its cell cycle, as compared to gamete of the same species, has:
(a) same number of chromosomes but twice the amount of DNA
(b) twice the number of chromosomes and four times the amount of DNA
(c) four times the number of chromosomes and twice the amount of DNA
(d) twice the number of chromosomes and twice the amount of DNA
Answer
Answer: (b) twice the number of chromosomes and four times the amount of DNA
Question 14.
The mechanism of distributing centriole pairs to the daughter cells is called
(a) Equational division
(b) Haplontic division
(c) Astral division
(d) Reductional division
Answer
Answer: (c) Astral division
Question 15.
Spindle fibres attach on to
(a) Telomere of the chromosome
(b) Kinetochore of the chromosome
(c) Centromere of the chromosome
(d) Kinetosome of the chromosome
Answer
Answer: (b) Kinetochore of the chromosome
Question 16.
Best stage to observe shape, size and number of chromosomes is
(a) interphase
(b) metaphase
(c) prophase
(d) telophase
Answer
Answer: (b) metaphase
Question 17.
Plants show mitotic divisions in
(a) Haploid cells
(b) Haploid cells and diploid cells
(c) Somatic cells
(d) Diploid cells
Answer
Answer: (b) Haploid cells and diploid cells
Question 18.
Which of the following phases in mitosis is in correct order?
(a) Prophase, telophase, metaphase, anaphase
(b) Prophase ,metaphase, anaphase, telophase
(c) Anaphase, telophase, metaphase, prophase.
(d) Metaphase, prophase, anaphase, telophase
Answer
Answer: (b) Prophase ,metaphase, anaphase, telophase
Question 19.
In between two walls of adjacent cells are seen
(a) Cell wall
(b) Cytoplasm
(c) Middle lamellae
(d) Plasma membrane
Answer
Answer: (c) Middle lamellae
Question 20.
In the somatic cell cycle
(a) In G1 phase DNA content is double the amount of DNA present in the original cell
(b) DNA replication takes place in S phase
(c) A short interphase is followed by a long mitotic phase
(d) G2 phase follows mitotic phase
Answer
Answer: (b) DNA replication takes place in S phase
Question 21.
In ‘S’ phase of the cell cycle:
(a) Amount of DNA doubles in each cell.
(b) Amount of DNA remains same in each cell.
(c) Chromosome number is increased.
(d) Amount of DNA is reduced to half in each cell.
Answer
Answer: (a) Amount of DNA doubles in each cell.
Question 22.
In animal cells, the mitotic division is seen in
(a) Haploid somatic cells
(b) Diploid cells
(c) Diploid somatic cells
(d) Haploid cells
Answer
Answer: (c) Diploid somatic cells
Question 23.
Cell growth results in disturbing the ratio between
(a) Nucleus – chromosome ratio
(b) Cytoplasm-chromosome ratio
(c) Cytoplasm-spindle fibre ratio
(d) Nucleus-cytoplasm ratio
Answer
Answer: (d) Nucleus-cytoplasm ratio
Question 24.
Astral body are formed of
(a) Microtubules
(b) Intermediate filaments
(c) Microfilaments
(d) Microvilli
Answer
Answer: (a) Microtubules
Question 25.
The resting phase is otherwise called as
(a) Prophase
(b) Interphase
(c) Metaphase
(d) Telophase
Answer
Answer: (b) Interphase
Question 26.
In animal cells, Cytokinesis takes place by furrow deepening centripetally and formation of two daughter cells. This method is known as
(a) Phragmoplast
(b) Cleavage Cytokinesis
(c) Cell plate formation
(d) None of these
Answer
Answer: (b) Cleavage Cytokinesis
Question 27.
Multinucleate condition arise when Cytokinesis does not follow karyokinesis, this type of cells are called as
(a) Holotype
(b) Coenocyte
(c) Prototype
(d) Uninuleate
Answer
Answer: (b) Coenocyte
Question 28.
In which stage, the cells remain metabolically active but do not proliferate?
(a) G1-phase
(b) G2-phase
(c) Go-phase
(d) S-phase
Answer
Answer: (c) Go-phase
Question 29.
Cell division is initiated in plants by
(a) Cytokinin
(b) Abscisic acid
(c) Gibberellin
(d) Auxin
Answer
Answer: (a) Cytokinin
Question 30.
During mitosis ER and nucleolus begin to disappear at
(a) Early metaphase
(b) Late metaphase
(c) Late prophase
(d) Early prophase
Answer
Answer: (c) Late prophase
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