Choose the Correct Answers

Cell Cycle

Evaluation

1. The correct sequence in cell cycle is

a. S-M-G1-G2

b. S-G1-G2-M

c. G1-S-G2-M

d. M-G-G2-S

2. If cell division is restricted in G1 phase of the cell cycle then the condition is known as

a. S Phase

b. G2 Phase

c. M Phase

d. G0 Phase

3. Anaphase promoting complex APC is a protein degradation machinery necessary for proper mitosis of animal cells. If APC is defective in human cell, which of the following is expected to occur?

a. Chromosomes will be fragmented

b. Chromosomes will not condense

c. Chromosomes will not segregate

d. Recombination of chromosomes will occur

4. 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

5. Centromere is required for

a. transcription

b. crossing over

c. Cytoplasmic cleavage

d. movement of chromosome towards pole

6. Synapsis occur between

a. mRNA and ribosomes

b. spindle fibres and centromeres

c. two homologous chromosomes

d. a male and a female gamete

7. In meiosis crossing over is initiated at

a. Diplotene

b. Pachytene

c. Leptotene

d. Zygotene

8. Colchicine prevents the mitosis of the cells at which of the following stage

a. Anaphase

b. Metaphase

c. Prophase

d. interphase

9. The paring of homologous chromosomes on meiosis is known as

a. Bivalent

b. Synapsis

c. Disjunction

d. Synergids

10. Anastral mitosis is the characteristic feature of

a. Lower animals

b. Higher animals

c. Higher plants

d. All living organisms