A lab-reared strain of mice is glucose 6-phosphate-insensitive. How would this affect glycogen synthesis? Select the best answer. Glycogen synthesis would increase because a greater insulin concentration would increase glucose transport. Glycogen synthesis would increase because glycogen synthase would always be active. Glycogen synthesis would decrease because the b form of glycogen synthase could not be allosterically activated. Glycogen synthesis would decrease because the usually inactive b form could not be converted to the always‑active a form. Glycogen synthesis would remain unchanged because other regulatory mechanisms would be unmasked.

Which of the following represents the chemical reaction of hydrazine and hydrogen peroxide to produce nitrogen and water? a. nitrogen + hydrogen peroxide → hydrazine + water b. nitrogen + water → hydrazine + hydrogen peroxide c. hydrazine + hydrogen peroxide → nitrogen + water d. water + hydrogen peroxide → nitrogen + hydrazine

The kidney filters potentially toxic substances in the blood, and thus “clears” the blood of those substances. this clearance function is dependent upon and proportional to the diffusion gradient of the substance across filtering capillaries, i. e. if the concentration of the substance is doubled, twice as much will be cleared from each ml of blood that is filtered. suppose that the body produces a constant amount of a substance x per unit of time. the kidneys eliminate substance x at a rate directly proportional to the concentration of the substance and the volume of blood cleared each minute (c): elimination = c × [x], where [x] is the steady-state concentration of substance x. imagine an individual with an initial concentration of x equal to [x]0 who develops kidney disease. her baseline clearance c0 drops to one half of the original (½c0). what is the new steady state concentration of x? (for simplicity, assume that substance x is 100% filtered by the kidney).

Select the star life cycle that is accurate