Which one is CORRECT about s-phase (synthetic phase)?
I. It occurs between $G_{1}$ and $G_{2}$
II. It marks the period during which DNA replicates
III. At the end of this phase DNA is doubled but the number of chromosomes remains unchanged
IV As the DNA is doubled in this phase number of chromosomes is also doubled
V. Centrioles replicate in this phase

I, I I, I V, V

are correct

No worries! We‘ve got your back. Try BYJU‘S free classes today!

I, I I, I I I, V

are correct

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

All are correct

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Only IV is correct

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B $I, I I, I I I, V$ are correct
Statement IV is incorrect while rest are correct. Only DNA is doubled during S phase. Chromosome duplication takes place during 'M' phase of cell cycle.
So, the correct option is 'I, II, III, V are correct'.

Suggest Corrections

Similar questions

G_{1}

G_{2}

	List I		List II
(a)	S Phase	(i)	Proteins are synthesized
(b)	G₂Phase	(ii)	Inactive phase
(c)	Quiescent stage	(iii)	Interval between mitosis and initiation of DNA replication
(d)	G₁Phase	(iv)	DNA replication

Column - I	Column - II
(a)	$G_{1}$ phase	(i)	Cell grows and organelle duplication
(b)	S phase	(ii)	DNA replication and chromosome duplication
(c)	$G_{2}$ phase	(iii)	Cytoplasmic growth
(d)	Metaphase in M-phase	(iv)	Alignment of M-phase chromosomes

G_{2}

_{1}

Join BYJU'S Learning Program