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chrystalhdz chrystalhdz
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6 years ago
The transition of the early earths atmosphere from
  one rich in hydrogen to one rich in oxygen may be
  attributed to
  a. photosystem II.
  b. photosystem I.
  c. the cyclic pathway of photosynthesis.
  d. the light-independent reactions.
  e. the activity of the electron transfer chain.

Question 2

Which event occurs last in the noncyclic pathway of
  ATP formation?
  a. excitation of p700
  b. transfer of energy to p700
  c. formation of NADPH
  d. ATP synthesis
  e. transfer of electrons to p680
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Replies
wrote...
#1
6 years ago
Answer to q. 1

Answer: a

Answer to q. 2

Answer: c
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