Explain in detail why fast-twitch fibers will use anaerobic respiration rather than aerobic respiration even though aerobic respiration is about 20 times more efficient in terms of ATP produced per each glucose molecule?

You’ve setup an in-vitro experiment to measure molecular motors and have an irreversibly binding ATP analogue. After conducting the experiment, you find that this irreversibly binding ATP analog stops motor function. Explain why that is the case.

Suppose myoglobin is prepared with Zn²+ in the place of Fe²+ in the porphyrin. Would you expect this modified myoglobin to bind oxygen? No, because Zn²+ cannot partially transfer an electron to oxygen to form a complex. Fe²+ . Yes, because oxygen can form a bond with either Zn²+ 2+ No, because the larger size of Zn²+ will prevent the ion from fitting within the porphyrin ring. Yes, because oxygen binding to myoglobin depends solely on the presence of a distal histidine. or

Refer to the figure below. VI ATP II ADP II ADP ADP (P) Reference: Ref 20-2 In the figure, which panel, taken out of context, represents a state where muscle relaxation could be occurring? Select one: O a. II O b. IV О с. VI