Question

During interphase, RNA and proteins are synthesized in
A. S phase
B. G1 phase
C. G2 phase
D. In both G1 and G2 phase

Answer 1

Hint: Series of events in which a cell grows and divides is known as the cell cycle. It includes interphase, G1 phase, S phase, G2 phase, M phase. Time during which a cell prepares itself for the division of cell growth is known as interphase.

Complete answer:
The process in which a cell replicates itself and forms two cells is known as the cell cycle. It consists of different stages like G1 phase, S phase, G2 phase, M phase.
Option A is incorrect because, in S phase, the DNA is replicated. Also known as the synthesis phase. This phase occurs between G1 phase and G2 phase. As the accurate duplication of the genome is very critical for the division of cells, this process is regulated very tightly and well conserved. Replication of DNA, synthesis of histone proteins and replication of nucleosomes occurs in S phase.
Option B is correct because, in G1 phase, The intermediate phase between end of division in mitosis and the replication of DNA during the S phase. In this phase the cell prepares for the replication of DNA and centrosomes also replicate. This is the phase where the monitoring of cells begins. During G1 phase the cell reviews its environment and the cell size and then it goes to either Go or in S phase.
Option C is incorrect because in G2 phase, Also known as gap 2 phase, is the last cycle of interphase and after this the cell enters the M phase. This phase is after the successful completion of S phase, in which DNA is replicated. G2 ends on the onset of prophase (first stage of M phase).
Option D is incorrect because both option b and option c are incorrect

During interphase, RNA and proteins are synthesized in G1 phase. Hence option B is correct.

Note:
Series of events in which a cell grows and divides is known as the cell cycle. It includes interphase, G1 phase, S phase, G2 phase, M phase. During interphase, RNA and proteins are synthesized in G1 phase. Hence option B is correct.