NEETBotanyCell Cycle and Cell Division
What happens to the centriole during the S phase in animal cells?
Options
- AIt remains unchanged
- BIt undergoes mitosis
- CIt duplicates
- DIt undergoes DNA replication
Correct answer
C. It duplicates
Step-by-step solution
During G1 phase the cell is metabolically active and continuously grows but does not replicate its DNA. S or synthesis phase marks the period during which DNA synthesis or replication takes place. During this time the amount of DNA per cell doubles. If the initial amount of DNA is denoted as 2C then it increases to 4C. However, there is no increase in the chromosome number; if the cell had diploid or 2n number of chromosomes at G1, even after S phase the number of chromosomes remains the same, i.e., 2n. In animal c