Look at the illustration and think about what you have learned about the regulation of the cell cycle. If Rb were mutated and could not be phosphorylated or bind E2F, which would be a possible outcome?
a. E2F would bind and transcription would proceed.
b. Rb would block transcription and apoptosis would be triggered.
c. Cancer would result due to unchecked cell growth and mitosis.
d. Transcription would be blocked and the cell cycle could not proceed.
c. Cancer would result due to unchecked cell growth and mitosis.
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The flow of biological information begins with
A) DNA replication. B) RNA transcription. C) mRNA translation. D) transcriptional regulation.
In this step in the identification of the colony that
contains a targeted gene, a. bacterial cells are cloned. b bacterial colonies are transferred. c. bacterial cells are ruptured. d. DNA is lysed. e. cells with the targeted gene are identified.
Mitosis results in the formation of _____
Fill in the blank(s) with the appropriate word(s).
Which hypothesis states that new species are prevented from entering a community by the existing
species?
a. equilibrium theory of island biogeography b. facilitation hypothesis c. inhibition hypothesis d. intermediate hypothesis e. tolerance hypothesis