DNA that is separate and apart from the chromosome in a prokaryote is the:
a. Ribosome
b. Endospore
c. Nucleus
d. Nucleoid
e. Plasmid
Answer: e. Plasmi
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In a mycorrhizal association, the fungus benefits mainly by ____
a. absorbing water from the plant b. using the plant roots as a growth surface c. absorbing mineral ions from the plant d. providing water to the plant e. absorbing carbohydrates from the plant
For what purpose do bacteria use restriction enzymes?
A. They are used in plasmid exchanges to fuse plasmid DNA. B. They are used to restrict important nutrients from leaving the bacterial cell. C. They are used to resist infections by viruses. D. They are used to cut up and recycle mRNA transcripts. E. They are used to attach amino acids to tRNA molecules.
During a specific defense, the process of increasing the numbers of the selected cells is called:a
mitotic expansion. b. clonal selection. c. divisional activation. d. lymphocytic activation. e. memory establishment.
In the lac operon, what effect does inducer binding have on repressor structure?
What will be an ideal response?