When proteins are used as a source of energy for the body, the proteins
A) are converted into glucose molecules, which are fed into glycolysis.
B) are converted mainly into intermediates of glycolysis or the citric acid cycle.
C) donate electrons directly to the electron transport chain.
D) are hydrolyzed to glucose and converted to acetyl CoA, which enters the citric acid cycle.
Answer: B
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The photosynthetic production of one molecule of glucose requires ________ molecule(s) of ATP.
A. 18 B. 12 C. 6 D. 24
The phage Mu
A) has a circular genome. B) repairs mutations in the host genome. C) replicates by transposition. D) has a circular genome, repairs host genome mutations, and can replicate by transposition.
Which of the following is FALSE when comparing the mitochondria and chloroplast?
A. Both have similar electron transport protein complexes whose structures have been well conserved. B. Both contain ATP synthase. C. Both generate ATP via a H+ electrochemical gradient. D. The inner-membrane space of the mitochondria is similar to that of the thylakoid space insofar as each has a higher H+ concentration relative to that of the mitochondrial matrix and chloroplast stroma. E. The stroma of chloroplasts is similar to that of the mitochondrial inner-membrane space insofar as each has a higher H+ concentration relative to that of the chloroplast thylakoid lumen and the mitochondrial matrix.
Which of the following statements about enzymes is FALSE?
The active site of the enzyme is where the chemical reaction takes place. The substrate binds to the enzyme with low specificity. The enzyme undergoes a conformational change that brings substrates closer together in an induced fit. The optimal activity of an enzyme occurs over a narrow temperature range. The optimal activity of an enzyme occurs within a narrow pH range.