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In S - phase of the cell cycle

  • amount of DNA dobles in each cell

  • amount of DNA remains same in each cell

  • chromosome number  is increased

  • amount of DNA is reduced to half in each cell

Answer

A.

amount of DNA dobles in each cell

S-phase is the synthesis phase in which the cell synthesis a replica of its gerome, i.e., DNA replication occurs by DNA polymerase. 

DNA replication along with the synthesis of histone proteins results in the duplication of chromosomal material i.e., amount of DNA doubles in each cell. 

Amount of DNA remains unchanged during G1 pahse or post mitotic gap and /or G2 phase pre mitotic phase.

S-phase is the synthesis phase in which the cell synthesis a replica of its gerome, i.e., DNA replication occurs by DNA polymerase. 

DNA replication along with the synthesis of histone proteins results in the duplication of chromosomal material i.e., amount of DNA doubles in each cell. 

Amount of DNA remains unchanged during G1 pahse or post mitotic gap and /or G2 phase pre mitotic phase.