How do sperm move to fertilize eggs?
A. with flagella made of actin
B. by diffusion
C. with cilia made of actin
D. with flagella made of microtubules
E. with cilia made of microtubules
E. with cilia made of microtubules
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Which of the following is true concerning
white muscle fibers and red muscle fibers?
a. white muscle fibers have more mitochondria b. red muscle fibers have no myoglobin c. white muscle fibers make ATP by aerobic respiration d. red muscle fibers fatigue less easily e. red muscle fibers get most of their ATP thanks to creatine phosphate
You identify a cell in which DNA polymerase III is functional, but it seems to exhibit extremely low processivity. This is likely a defect in what structure?
A) the t proteins B) the pol III holoenzyme C) the clamp loader D) the topoisomerase enzyme E) the sliding clamp
What is the great risk of warming to tropical marine species?
A) reduced growing season B) reduced water availability C) less variable precipitation D) Most species live near their thermal maximum.
In order to be completely functional, a T cell must be activated by
A) bone marrow. B) the thyroid gland. C) the parathyroid gland. D) the thymus gland. E) the lymph nodes.