A duplicate copy of all of the hereditary information contained in the nucleus of eukaryotic cells is made during what stage of the cell cycle?
A. G1
B. S
C. G2
D. Mitosis
E. Cytokinesis
B. S
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Hydropower can have an affect on
a. water pollution. b. soil erosion. c. deforestation. d. river and ocean life. e. mineral leaching.
If you mutate the gene encoding a Cdk such that Cdk protein product cannot bind to cyclin, what effect would you expect to see?
A) Cdk will be unaffected. B) The cell cycle will be up-regulated, and the cells will proliferate. C) Cdk will be inactive, so the target proteins will not be phosphorylated. D) Cdk will be constitutively active, so the cell cycle will be unchecked. E) Cdk will phosphorylate its target proteins regardless of the cell cycle.
The infectious disease that produces spastic paralysis is ____
a. botulism
b. sarcoma c. Duchenne muscular dystrophy d. tetanus e. myotonic muscular dystrophy
The hormone IAA helps plants to respond to and grow toward a light source by:
A) triggering release of growth factors at the tip of the stem. B) slowing growth under low light conditions. C) elongating cells on the opposite side of the shoot facing light. D) increasing mitosis on the side of the shoot facing light.