What protein makes up a thick myofilament?
A) T tubules
B) Muscle twitch
C) Testosterone
D) Myosin
Answer: D) Myosin
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Animals breathe in air containing oxygen and breathe out air with less oxygen. The consumed oxygen is used:
A. in the Krebs cycle. B. in the glycolysis pathway. C. in the conversion of pyruvate to acetyl Co- A. D. in photosynthesis. E. as an electron acceptor in the respiratory electron transport chain.
Pulmonary veins carry ____
a. oxygen-rich blood back to the heart b. oxygen-poor blood back to the heart c. oxygen-rich blood away from the heart d. oxygen-poor blood away from the heart e. oxygen-rich blood to and from the heart
When one molecule of glucose is completely oxidized in aerobic respiration, the net amount of ATP
produced is: a. 2 b. 4 c. 22 d. 34 to 36 e. 36 to 38.
The fertilization process of flowering plants involves ____ nuclear fusion(s)
a. one b. two c. single d. multiple e. incomplete