Pyruvate must move from the cytosol into the mitochondria, where it is oxidized to form CO2 and acetyl CoA by the pyruvate dehydrogenase complex
How many different enzymes and what total number of polypeptides, respectively, are required to perform this oxidation process in the mitochondrion?
(a) 1; 60
(b) 3; 3
(c) 3; 26
(d) 3; 60
(d)
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Which of the following statements about homeostasis is false?
A. It depends primarily on positive feedback. B. It is the maintenance of a steady physiological state within an organism or cell. C. It is necessary for proper functioning of the body. D. The endocrine system plays a major role in maintaining homeostasis. E. None of the answer options is false.
Plants and animals that rely on diffusion to move molecules through their bodies tend to ________
a. be large b. have respiratory and vascular systems c. be small and flat d. evolve few adaptations because diffusion is a passive process
Innate immune defenses typically take between 7 to 10 days to fully develop.
Indicate whether the statement is true or false.
Cancer is associated with problems related to the regulation of ________
A) mitosis B) meiosis I C) meiosis II D) cytokinesis