Gram-negative bacteria in the genus ________ prey on other Gram-negative bacteria.
A. Bdellovibrio
B. Chlamydia
C. Rickettsia
D. Mycoplasma
E. Caulobacter
Answer: A
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In the photosystem I reaction center, light energy captured by pigment molecules is passed to a special reaction center chlorophyll a called
A. P680. B. P700. C. chlorophyll I. D. chlorophyll II. E. retinal.
The lagging strand is the daughter strand that has its ____ end pointed toward the replication fork and is therefore synthesized ______
A. 3'; in a series of segments B. 3'; continuously C. 5'; in a series of segments D. 5'; continuously E. None of the answer options are correct.
Which of the following explains how chimpanzees and humans can be so different with such similar genomes?
A. The anatomical and behavioral differences between chimpanzees and humans isn't that large. B. Different environments between the two populations influenced the anatomical and behavioral differences. C. The human population is so much larger than the chimpanzee population that we benefit from more genetic variation. D. The genetic differences could have occurred in genes responsible for development. E. None of the answer options is correct.
Saliva is a poor growth medium for bacteria due to
a. the presence of lysozyme. b. the presence of mucus. c. lack of nutrients. d. lack of available oxygen.