What important metabolic intermediate does not cross the inner membrane of the mitochondria?
A. oxygen
B. ATP
C. pyruvate
D. acetyl-CoA
Answer: D
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The fossil record shows life originated on Earth at least 3.5 billion years ago and was comprised entirely of microorganisms. What sort(s) of fossils have been discovered by paleontologists provide the strongest evidence of this conclusion?
A. bacterial microfossils B. stromatolites C. isotopic analysis of carbon in sedimentary rocks (derivatives of biomolecules from once living organisms) D. fossil fuels (crude oil, coal)
All of the following are lipids except
A. starch. B. phospholipid. C. wax. D. cholesterol. E. triglyceride.
Consider an animal that is a tetraploid. Following meiosis, how many copies of each homologous chromo-some will be found in the gametes?
What will be an ideal response?
The nucleoplasm has a different fluid composition than the cytoplasm of a cell.
a. true b. false