Question

QUESTION 1

1. Which of the following is an enzyme?

   		a G protein
   		a G protein-coupled receptor
   		ATP
   		All of the above
   		None of the above

1 points   

QUESTION 2

1. Which of the following is true for all enzymes?

   		They alter the transition state.
   		They decrease ΔG.
   		They provide energy for endergonic reactions.
   		They harness energy from ATP.

1 points   

QUESTION 3

1. The pathway of glycolysis can be found in:

   		Anaerobic bacteria only
   		Anaerobic species only
   		All bacteria, but not Eukaryotes
   		All species

1 points   

QUESTION 4

1. Which of the following best explains why aerobic metabolism is "better" than anaerobic metabolism?

   		It produces water
   		It produces CO2.
   		It produces more ATP for every molecule of glucose oxidized.
   		It doesn't require glucose.

1 points   

QUESTION 5

1. The Citric Acid Cycle nets _____ molecule(s) of ATP per molecule of glucose (assume GTP and ATP are interchangeable).

   		1
   		2
   		3
   		4

Answer 1

1. None of the above

G protein is GTP.

GTP and ATP are nucleotides.

GPCR is a membrane bound receptor.

2. Decrease ∆G

Enzymes work by decreasing the activation energy of the reaction which is the gibbs activation energy. But they do not change the overall free energy of the reaction.

3. All species

Glycolysis is a process which results in The breakdown of glucose into two molecules of pyruvic acid. It is a common step for aerobic and anaerobic respiration which occurs in cytoplasm of prokaryotes and eukaryotes.

4. Produces more ATP

Aerobic respiration is The breakdown of glucose in the presence of Oxygen and is much more efficient than anaerobic respiration which is The breakdown of glucose in the absence of oxygen. In aerobic respiration thirty two molecules of ATP are produced whereas in anaerobic respiration it is 4 molecules of ATP.

5. 2

One round of citric acid cycle produces one molecule of GTP and it occurs twice for one molecule of glucose.

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