An —NH2 group is a(n) __________ group
a. carboxyl
b. hydroxyl
c. amine
d. methyl
e. carbonyl
Answer: c
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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.
In the process of quorum sensing, bacteria release signaling molecules in ____ concentrations as cell density ____
a. increasing; decreases b. increasing; increases c. decreasing; increases d. decreasing; decreases e. constant; increases
An apoenzyme is ________.
A. an RNA molecule B. often an inorganic metal ion C. the protein part of a holoenzyme D. also called a coenzyme E. part of a simple enzyme
A research student is analyzing the nucleic acid of a virus. He finds that the nucleic acid contains thymine. From this it can be concluded that the nucleic acid
A) contains uracil. B) contains ribose. C) is actually a protein. D) contains glucose. E) is a strand of DNA.