Suppose that the pH of the matrix was significantly lower than the inner mitochondrial space. How would the ATP synthase function differently?
a. It would misfold.
b. It would no longer function properly.
c. It would require an ion to stabilize it.
d. It would hydrolyze ATP to form ADP.
Ans: d. It would hydrolyze ATP to form ADP.
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What is the significance of the production of above-ground coralloid roots by cycads that have underground stems?
A. The roots grow in waterlogged soil and they need to protrude into the air in order to respire. B. The branching of coralloid roots provides greater surface area for absorption of water. C. It keeps roots above the ground where they cannot be attacked by parasitic nematodes. D. The roots have mutualistic photosynthetic cyanobacteria that fix nitrogen for the cycad and the cyanobacteria can only survive if they are above ground where they are exposed to light. E. The soil in which cycads live has a low pH that would kill the roots if they were completely below ground.
If one were to double the amount of enzyme in a reaction with an initial ?G of -5 kcal/mole, what would the ?G be?
A. +10 kcal/mole
B. -20 kcal/mole
C. +5 kcal/mole
D. -10 kcal/mole
E. -5 kcal/mole
The redox carriers of the electron transport system that have a tightly bound metal atom responsible for accepting and donating electrons are ________.
A. the cytochromes B. NADP molecules C. FAD molecules D. the flavoproteins E. NAD molecules
The wing of a bird and the wing of an insect are examples of homoplasy.
a. true b. false