Which of the following statements is TRUE about the light reactions?
A) Photosystem II generates ATP, whereas photosystem I generates NADPH.
B) Photosystem I generates ATP, whereas photosystem II generates NADPH.
C) ATP is the final electron acceptor.
D) NADPH and ATP are both synthesized from the light reactions within photosystem I.
A
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The enzyme glucose-6-phosphate dehydrogenase deficiency (G6PD) is inherited as a recessive gene on the X chromosome in humans. A phenotypically normal woman (whose father had G6PD) is married to a normal man
(a) What fraction of their sons would be expected to have G6PD? (b) If the husband had G6PD, would it make a difference in your answer in part (a)?
Aspirin and other nonsteroidal anti-inflammatory drugs (NSAID) inhibit inflammation by inhibiting an enzyme in the prostaglandin pathway. However, inhibiting this enzyme also inhibits other pathways that protect the stomach from damage by stomach acid
and that form blood clots. What can you conclude from this? A) The enzyme inhibition is nonreversible. B) The enzyme is found in many different types of cells. C) Prostaglandins cause blood clotting. D) Aspirin should not be given to people who people who need to synthesize enzymes.
Which of the following features would you expect to see in the flowers of wind-pollinated grasses?
A) very large, fragrant, white flowers B) petals with UV-absorbing "nectar guides" C) very simple flowers that produce massive quantities of pollen D) red flowers with long nectar tubes
Which of the following is an important force for evolution?
A. Mutation B. Genetic drift C. Migration D. Natural selection E. All of the above