Bacterium divides every 35 minutes. If a culture containing 10⁵ cells per mL is grown for 175 minutes, what will be the cell concentration per mL after 175 minutes?

1. 5 x 10⁵ cells

2. 35 x 10⁵ cells

3. 32 x 10⁵ cells

4. 174 x 10⁵ cells

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

DNA replication in bacteria occurs

(1) during S-phase

(2) within nucleolus

(3) prior to fission 

(4) just before transcription 

During cell growth, DNA synthesis takes place in

(1) S-phase                       

(2) ${\mathrm{G}}_1$-phase

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

(4) M-phase 

When cell has stalled DNA replication fork, which checkpoint should be predominantly activated?

(1) G₁/s

(2) G₂/M

(3) M

(4) Both G₂/M and M

A somatic cell that has just completed the S-phase of its cell cycle, as compared to gamete of the same species has

1. twice the number of chromosomes and twice the amount of DNA

2. same number of chromosomes but twice the amount of DNA

3. twice the number of chromosomes and four times the amount of DNA

4. four times the number of chromosomes and twice the amount of DNA

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

inital amount is denoted as 2C?

1. G₀ and G₁

2. G₁ and S

3. Only G₂

4. G₂ and M

In S-phase of the cell cycle 

1. amount of DNA doubles in each cell

2. amount of DNA remains same in each cell

3. chromosome number is increased

4. amount of DNA is reduced to half in each cell