MERIT YARD

[Cell Cycle and Division - VVI MCQs - MERIT YARD]

Question 1 / 40In which phase of the cell cycle does DNA replication occur?

A) G1 phase

B) S phase

C) G2 phase

D) M phase

Question 2 / 40The stage between two successive M phases is called:

A) Prophase

B) Anaphase

C) Interphase

D) Telophase

Question 3 / 40Which of the following is also known as 'Equational Division'?

A) Mitosis

B) Meiosis I

C) Meiosis II

D) Amitosis

Question 4 / 40The process of crossing over occurs during:

A) Leptotene

B) Zygotene

C) Pachytene

D) Diplotene

Question 5 / 40During which stage of mitosis do chromosomes align at the equator?

A) Prophase

B) Metaphase

C) Anaphase

D) Telophase

Question 6 / 40Splitting of centromere occurs in:

A) Metaphase

B) Anaphase

C) Prophase

D) Telophase

Question 7 / 40Inactive stage of cell cycle where cells exit G1 is:

A) S phase

B) G2 phase

C) G0 phase (Quiescent stage)

D) M phase

Question 8 / 40Synaptonemal complex is formed during:

A) Leptotene

B) Zygotene

C) Pachytene

D) Diplotene

Question 9 / 40Recombination nodule is seen in:

A) Zygotene

B) Pachytene

C) Diakinesis

D) Metaphase

Question 10 / 40X-shaped structures called Chiasmata are visible in:

A) Pachytene

B) Diplotene

C) Zygotene

D) Leptotene

Question 11 / 40The division of cytoplasm is known as:

A) Karyokinesis

B) Cytokinesis

C) Mitosis

D) Meiosis

Question 12 / 40How many mitotic divisions are needed for a single cell to form 128 cells?

A) 127

B) 32

C) 7

D) 14

Question 13 / 40Mitosis occurs in:

A) Germ cells only

B) Somatic cells

C) Haploid cells only

D) None

Question 14 / 40Which enzyme is involved in crossing over?

A) Recombinase

B) Ligase

C) Polymerase

D) Endonuclease

Question 15 / 40Nuclear membrane disappears during:

A) Early Prophase

B) Late Prophase

C) Metaphase

D) Anaphase

Question 16 / 40Chromosome number is reduced to half in:

A) Mitosis

B) Meiosis I

C) Meiosis II

D) Fertilization

Question 17 / 40Terminalisation of chiasmata occurs in:

A) Diplotene

B) Diakinesis

C) Pachytene

D) Zygotene

Question 18 / 40Histone protein synthesis occurs in:

A) G1 phase

B) S phase

C) G2 phase

D) M phase

Question 19 / 40Duration of the cell cycle in a typical human cell is:

A) 90 minutes

B) 24 hours

C) 10 hours

D) 1 hour

Question 20 / 40Number of chromatids at metaphase is:

A) Two per chromosome

B) One per chromosome

C) Four per chromosome

D) None

Question 21 / 40Stage between Meiosis I and Meiosis II is:

A) Interphase

B) Interkinesis

C) Cytokinesis

D) Diakinesis

Question 22 / 40Pairing of homologous chromosomes is called:

A) Synapsis

B) Crossing over

C) Terminalisation

D) Disjunction

Question 23 / 40At which stage of mitosis does the cell look like a ball of wool (Spirem stage)?

A) Prophase

B) Metaphase

C) Anaphase

D) Telophase

Question 24 / 40In which phase are cell organelles like Golgi and ER reformed?

A) Prophase

B) Metaphase

C) Anaphase

D) Telophase

Question 25 / 40Best stage to study the shape of chromosomes is:

A) Metaphase

B) Anaphase

C) Prophase

D) Telophase

Question 26 / 40Best stage to study the morphology (structure) of chromosomes is:

A) Metaphase

B) Anaphase

C) Prophase

D) Telophase

Question 27 / 40In plant cells, cytokinesis occurs by:

A) Cell furrow

B) Cell plate formation

C) Cleavage

D) Budding

Question 28 / 40Meiosis occurs in which type of cells?

A) Meiocytes

B) Somatic cells

C) Vegetative cells

D) Red blood cells

Question 29 / 40Which stage of prophase I is characteristically the longest?

A) Pachytene

B) Leptotene

C) Zygotene

D) Diakinesis

Question 30 / 40Disjunction refers to:

A) Separation of homologous chromosomes

B) Pairing of chromosomes

C) DNA replication

D) Cytokinesis

Question 31 / 40The number of bivalents in a cell having 2n=20 is:

A) 20

B) 10

C) 40

D) 5

Question 32 / 40Mitosis is called equational division because:

A) Chromosome number remains same

B) Chromosome number becomes double

C) Chromosome number becomes half

D) It occurs in all cells

Question 33 / 40Colchicine drug inhibits mitosis at:

A) Prophase

B) Metaphase

C) Anaphase

D) Telophase

Question 34 / 40The duration of yeast cell cycle is:

A) 90 minutes

B) 24 hours

C) 1 hour

D) 10 minutes

Question 35 / 40In which stage do the centrioles move to opposite poles?

A) Prophase

B) Metaphase

C) Anaphase

D) Telophase

Question 36 / 40Small disc-shaped structures at the surface of centromeres are:

A) Kinetochores

B) Chromatids

C) Centrioles

D) Spindles

Question 37 / 40Meiosis results in:

A) 4 haploid daughter cells

B) 2 diploid daughter cells

C) 4 diploid daughter cells

D) 2 haploid daughter cells

Question 38 / 40Crossing over leads to:

A) Genetic recombination

B) Mutation

C) Linkage

D) Polyploidy

Question 39 / 40Which phase occupies more than 95% of the duration of cell cycle?

A) M phase

B) Interphase

C) Cytokinesis

D) G0 phase

Question 40 / 40What happens during G2 phase?

A) DNA replication

B) Protein synthesis for mitosis

C) Chromosome separation

D) Cell death