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

During cell growth, DNA synthesis takes place in

(1) S-phase                       

(2) ${\mathrm{G}}_1$-phase

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

(4) M-phase