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NEET2015BotanyCell Cycle and Cell DivisionActual

The mitotic cell cycle is divided typically into four phases: G ₁, ~S , G ₂ and M . Considering a mitotic cycle time of 18 hrs ; the distribution of period of time (in hrs) for each of these phases will be

Options

  1. Aarray cccc G ₁ & ~S & G ₂ & M 1 & 3 & 5 & 9 array
  2. Barray cccc G ₁ & ~S & G ₂ & M 9 & 1 & 3 & 5 array
  3. Carray cccc G ₁ & ~S & G ₂ & M 9 & 5 & 3 & 1 array
  4. Darray cccc G ₁ & ~S & G ₂ & M 3 & 5 & 9 & 1 array

Correct answer

C. array cccc G ₁ & ~S & G ₂ & M 9 & 5 & 3 & 1 array

Step-by-step solution

The longest phase of cell cycle is G ₁ where these rapid growth and metabolic activity, followed by S phase for DNA synthesis and replication then G ₂ phase for preparation of cell division and lastly mitotic phase. Ratio is 9: 5: 3: 1

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