Biology

Barker

14 September, 14:00

An experiment was performed to study the progress of cells through the mitotic cell cycle. The compounds listed were used one at a time to study their effects on the cell cycle: cytochalasin: an inhibitor of actin microfilament assembly colchicine: an inhibitor of microtubule formation aphidicolin: an inhibitor of DNA polymerase activity emetine: an inhibitor of ribosome activity (blocks protein synthesis) Which of these compounds would be most likely to arrest cells in S Phase?

a. emetine: an inhibitor of ribosome activity (and therefore protein synthesis)

b. cytochalasin: an inhibitor of actin microfilament assembly

c. aphidicolin: an inhibitor of DNA polymerase activity

d. colchicine: an inhibitor of microtubule formation