Which of the following is/are possible uses of amino acids in energy production?
A. forming a ketoacid that can enter the citric acid cycle
B. forming intermediate molecules of carbohydrate metabolism
C. forming NADH that enters the electron-transport chain.
D. All of the choices are uses of amino acids in energy production.
D
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Muscle fibers can have various arrangements. The most powerful arrangement is called
A) parallel. B) convergent. C) circular. D) pennate. E) None of the answers are correct.
Which of the following is a function of erythrocytes?
A. To defend the body against pathogens B. To initiate blood clotting C. To regulate erythropoiesis D. To transport carbon dioxide E. To transport nutrients
Presynaptic vesicles are located in the ________
A) axon hillocks B) neurofibrils C) axon terminals D) telodendria
What structure of a sarcomere contains proteins that connect and stabilize thin filaments?
A) Z line B) H band C) I band D) A band