TLS Online TPP Program

#Question id: 9168


Which of the following statements best describes the interaction between fire and ecosystems?

#Unit 9. Diversity of Life Forms
  1. The likelihood of a wildfire occurring in a given ecosystem is highly predictable over the short term.

  2. Many kinds of plants and plant communities have adapted to frequent fires.
  3. The suppression of forest fires by humans has prevented certain communities, such as grasslands, from reaching their climax stage.

  4. Chaparral communities have evolved to the extent that they rarely burn
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TLS Online TPP Program

#Question id: 996

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is (are) true of the oxidation of 1 mol of palmitate (a 16-carbon saturated fatty acid; 16:0) by the B-oxidation pathway, beginning with the free fatty acid in the cytoplasm?

1. Activation of the free fatty acid requires the equivalent of two ATPs.

2. Inorganic pyrophosphate (PPi) is produced.

3. Carnitine functions as an electron acceptor.

4. 8 mol of FADH2 are formed.

5. 8 mol of acetyl-CoA are formed.

6. There is no direct involvement of NAD+.

TLS Online TPP Program

#Question id: 995

#Unit 1. Molecules and their Interaction Relevant to Biology

Saturated fatty acids are degraded by the stepwise  reactions of B oxidation, producing acetyl-CoA. Under aerobic conditions, how many ATP molecules would be produced as a consequence of removal of each acetyl-CoA?

TLS Online TPP Program

#Question id: 994

#Unit 1. Molecules and their Interaction Relevant to Biology

If the 16-carbon saturated fatty acid palmitate is oxidized completely to carbon dioxide and water (via the B-oxidation pathway and the citric acid cycle), and all of the energy-conserving products are used to drive ATP synthesis in the mitochondrion, the net yield of ATP per molecule of palmitate is:

TLS Online TPP Program

#Question id: 993

#Unit 1. Molecules and their Interaction Relevant to Biology

What is the correct order of function of the following enzymes of beta oxidation?

1. B-Hydroxyacyl-CoA dehydrogenase

2. Thiolase

3. Enoyl-CoA hydratase

4. Acyl-CoA dehydrogenase

TLS Online TPP Program

#Question id: 812

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is not known to be involved in the process of assisted folding of proteins?

TLS Online TPP Program

#Question id: 813

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following does NOT impose limits on protein folding?