If a dividing cell had no functional Cdk2 protein, the cell would not be able to ____
a. phosphorylate cyclins
b. transcribe the Cdk2 gene
c. enter G1
d. translate cyclin mRNA
e. degrade cyclins
ANSWER: c
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DNA replication is ____
a. redundant b. semiconservative c. progressive d. conservative e. repetitive
The Calvin cycle requires all of the following except
A. NADPH. B. carbon dioxide. C. ATP. D. water. E. oxygen.
Mosses grow on the branches of some plants. The moss is benefited but the other plant is neither helped nor harmed. This is an example of what type of symbiosis?
a) mutualism b) parasitism c) predation d) commensalism
Why are mosses and liverworts dependent on water for reproduction?
A) Sperm must swim through water to reach and fertilize eggs. B) Egg and sperm production occurs only when the plants are immersed in water. C) Eggs are passively transported to sperm by water. D) Sperm are passively transported to eggs by water. E) Eggs and sperm are released into water and then unite.