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When G1 and S phase cells were fused together, the G1 nucleus beganto replicate

ID: 5569 • Letter: W

Question

When G1 and S phase cells were fused together, the G1 nucleus beganto replicate DNA when it was exposed to S phase cytoplasm in thefused cell. What conclusion was drawn from this result.

a.) G1 phase nuclei contain diffusible factors that stimulate theinitiation of DNA synthesis.
b.) G1 phase cytoplasm contains diffusible factors that stimulatethe initiation of DNA synthesis.
c.) S phase nuclei contain diffusible factors that stimulate theinitiation of DNA synthesis.
d.) S phase cytoplasm contains diffusible factors that stimulatethe initiation of DNA synthesis..

Explanation / Answer

b.) G1 phase cytoplasm contains diffusible factors that stimulate the initiation of DNA synthesis.