Question 10 Select the correct statement about G 1 phase (a) cell is metabolically inactive (b) DNA in the cell does not replicate

The amount of DNA is same in G1 or growth 1 phase and G0 stage or Quiescent phase. In G0 stage the cell is neither dividing nor preparing to divide. In the G1 stage, only growth takes place no replication of DNA takes place. So, the amount of DNA remains the same in G1 and G0 stage.

The cell cycle is divided into two phase, mitotic phase and interphase. The interphase is further divided into three phases, namely G 1 phase, S (synthesis) phase and G 2 phase. In G 1 phase, there is the synthesis of RNA, enzymes, proteins, amino acids for histone formation, the formation of nucleotides and ATP. During S phase, the DNA is ...

A. G1 Phase B. G2 Phase C. G3 Phase D. Synthesis Phase. A1: The correct option is C, which is the G3 Phase. This is because there is no such stage as the G3 phase. Furthermore, the other three options are certainly the stages or phases of the Interphase. Download the Toppr – Best Learning App for Android and iOS or signup for free.

The cell cycle is the series of events that lead to the doubling of DNA of a cell and the formation of two daughter cells. It is divided into four phases- G1, S, G2, and M phase. In the S phase DNA content is doubled.

G 1 phase is also known as first growth phase or post mitotic gap phase. It is the phase between end of mitotic phase of previous cell and initiation of S-phase of next mitotic phase. During G 1 phase the cells is metabolically active and continuously grows. In this phase different type of RNA (mRNA,tRNA and rRNA) and proteins are synthesised.

B. G1 phase is the interval between mitosis and initiation of DNA replication. In this, the cell does not synthesize or replicate DNA but remains metabolically active. C. G2 phase is the second gap phase present between S and M phase.

During G1- phase, cells grow and synthesize the 20 amino acids needed to manufacture proteins later on. B. Cell cycle begins with the resting phase. During this phase, cells are at ''rest''.

Solution: In the S phase the DNA content gets doubled as the event of replication occurs at this phase but the number of chromosome remains unchanged. In M phase, the increased amount of DNA gets equally divided into the two daughter cells …

It is given that the number of chromosomes present in each onion root tip cell is 16. Hence, the number of chromosomes in the cell will be 16 at G 1 phase, after S phase and after M phase. Also, if the DNA content after M phase is 2C. Hence, the DNA content at G 1 phase will be 2C. It will be 4C after S and G 2 phase.