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Question: Answered & Verified by Expert
In the 'S' phase of the cell cycle:
BiologyCell Cycle and Cell DivisionNEETNEET 2014
Options:
  • A Amount of DNA doubles in each cell
  • B Amount of DNA remains same in each cell
  • C Chromosome number is increased
  • D Amount of DNA is reduced to half in each cell
Solution:
2664 Upvotes Verified Answer
The correct answer is: Amount of DNA doubles in each cell

S-phase/Synthetic phase
(a) DNA replicates and its amount becomes double (2C 4C). 
(b) Synthesis of histone proteins.
(c) Euchromatin replicates earlier than heterochromatin.
(d) Synthesis of NHC (non-histone chromosomal proteins).
(e) Each chromosome has 2 chromatids. Amount of DNA doubles but the chromosome number remains constant.

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