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Alexis23 Alexis23
wrote...
Posts: 547
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6 years ago
The backbone of organic molecules consists of
  covalently bonded __________ atoms.
  a. oxygen
  b. hydrogen
  c. functional-group
  d. carbon
  e. all of these

Question 2

_______ are complex carbon ring structures that
  often have an iron atom at their center.
  a. Hemes
  b. Globins
  c. Globulins
  d. Sugars
  e. Alkenes
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Replies
wrote...
6 years ago
Answer to q. 1

Answer: d

Answer to q. 2

Answer: a
Alexis23 Author
wrote...
6 years ago
Good timing, thanks!
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