What is the function of NADH and FADH2?
a. Both release energy for glycolysis to proceed forward.
b. Both provide electrons to the electron transfer system.
c. Both produce ATP by substrate-level phosphorylation.
d. NADH delivers electrons, while FADH2 supplies H+.
e. NADH is found only in the cytosol and FADH2 only in the matrix.
ANSWER: b
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Reverse transcriptase is an enzyme that can synthesize DNA from an RNA template. What DNA sequence is produced from an RNA molecule with the sequence AUUGACGGU?
A. UAACUGCCA B. TTTCTGCCT C. TAACTGCCA D. ATTCAGCCT E. TUUCTGCCU
Eukaryotic cells are larger than bacterial or archaeal cells; all cells are larger than macromolecules. Where do viruses fit on this scale?
A. Viruses are smaller than eukaryotic cells, but larger than bacterial or archaeal cells. B. Viruses are smaller than macromolecules. C. Viruses are smaller than bacterial or archaeal cells, but larger than macromolecules. D. Viruses are larger than eukaryotic cells.
Chemical germicides
A. may react irreversibly with proteins/enzymes.
B. may react with cytoplasmic membranes or viral envelopes.
C. may be disinfecting or even sterilizing.
D. are sensitive to dilution factor, time of contact, and temperature of use.
E. All of the choices are true.
Where do plants get the carbon they use to make organic molecules?
a. glucose b. oxygen c. water d. starch e. carbon dioxide