The cell membranes of bacteria and eukaryotes are quite similar, differing only in
A. the presence of phospholipids.
B. the presence of sterols.
C. being selectively permeable.
D. the ability to transport wastes out of the cell.
E. the presence of proteins in the bilayer.
Answer: B
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The tart taste of yogurt, pickles and sharp cheeses is due to the presence of
A. lactic acid. B. acetic acid. C. sorbic acid. D. benzoic acid.
The transcription terminator
A. results in a hairpin loop structure in RNA. B. results in the polymerase falling off the DNA template. C. stops DNA polymerase. D. adds a terminator nucleotide to the RNA. E. results in a hairpin loop structure in RNA AND results in the polymerase falling off the DNA template.
The earliest pollinators of flowers were probably ____ that visited flowers to chew on the petals and leaves
a. mice b. bees c. earwigs d. beetles e. grasshoppers
Charles is eager to start a new career. He is committed to solve any problems that come his way, and believes he has control over what happens in his life. This suggests that Charles _____.
A. has a Type A personality B. is psychologically hardy C. is at risk for a heart attack D. suffers from delusions of grandiosity