During cell cycle, events are under

1. Genetic control

2. Metabolic control

3. Cytoplasmic control

4. Mitochondrial control

The centrioles replicate during:
1. G₁ phase
2. S phase
3. G₂ phase
4. Early prophase

Consider the given two statements:

l. During G₁ phase the cell is metabolically active and continuously grows but does not replicate its DNA.

ll. During G₂ phase, proteins are synthesized in preparation for mitosis while cell growth continues.

Of the two statements:
1. Only l is correct
2. Only ll is correct
3. Both l and ll are correct
4. Both l and ll are incorrect 

If the DNA content of an onion tip cell is 2C at the end of the M-phase, what would be its DNA content at the end of the S-phase?

1. C

2. 2C

3. 3C

4. 4C

During cell growth, DNA synthesis takes place in

(1) S-phase                       

(2) ${\mathrm{G}}_1$-phase

(3) ${\mathrm{G}}_2$-phase                     

(4) M-phase 

During which phase(s) of cell cycle, the amount of DNA in a cell remain at 4C level if the

initial amount is denoted as 2C?

1. G₀ and G₁

2. G₁ and S

3. Only G₂

4. G₂ and M

Given below is a schematic break-up of the phases/stages of the cell cycle

Which one of the following is the correct indication of the stage/phase in the cell cycle?

1. B-Metaphase

2. C-Karyokinesis

3. D-Synthesis phase

4. A-Cytokinesis 

Which is the longest phase of the cell cycle?
(1) M-phase

(2) Interphase

(3) Leptotene

(4) S-phase

The correct sequence of phases in cell cycle is:

1. ${\mathrm{G}}_1\to \mathrm{S}\to {\mathrm{G}}_2\to \mathrm{M}$

2. $\mathrm{M}\to {\mathrm{G}}_1\to {\mathrm{G}}_2\to \mathrm{S}$

3. ${\mathrm{G}}_1\to {\mathrm{G}}_2\to \mathrm{S}\to \mathrm{M}$

4. $\mathrm{S}\to {\mathrm{G}}_1\to {\mathrm{G}}_2\to \mathrm{M}$

Which one of the following features differentiates G₂
phase from G₁ phase?
1. Synthesis of proteins.
2. 4C content of DNA.
3. 2C content of DNA.
4. Synthesis of RNA.