Question

If a cell no longer is able to produce cyclin during Sphase of interphase, what would be the immediate result? DNA would not be replicated DNA polymerase would not be produced Organelles would not be duplicated ATP production would increase The cell would immediately enter M-phase

Answer 1

Correct Answer- DNA would not be replicated.

Explanation- The S-Cdk at the onset of the S-phase is involved in a variety of tasks-It causes the activation of a group of initiator proteins attached to the origin of replication, which then causes the assembly of the large Pre-replicative complex. The S-CDK also stimulates the DNA helicase to get activated. So the absence of the cyclin causes the stoppage of the initiation of DNA replication.

Why not others--

#DNA polymerase would not be produced-- the production od DNA polymerase is neither directly, nor indirectly influenced by S-CDK.

#Organelles would not be replicated---the replication of the organelles is not controlled by S-Cdk.

#ATP production would increase-- there is not replation between cyclins levels and ATP production. ATP is produced with respect to the metabolic needs of the cell.

#The cell would immediately enter M phase-- a cell cannot enter the Mmphase without the DNA being duplicated. There are check mechanismsn that ensures that there are no erreors befor ethe cell enters the M -phase, since the M phase is acrucial phase.