Large gut populations of Bifidobacterium are associated with ____
a. peptic ulcers
b. irritable bowel syndrome
c. gastroesophageal reflux disease
d. improved immune function
e. increased vital capacity
ANSWER: d
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Why is mutation described as the only process that can increase genetic variation?
A. It is the only process that can produce new alleles. B. It is the only process that changes allele frequency. C. It is the only process that cannot be influenced by artificial selection. D. It is the only process that is not random. E. It is the only process that can produce deleterious results.
In somatic cell nuclear transfer, which of the
following occurs?
a. the adult cell injected into the egg cell immediately starts dividing. b. an electric current causes the injected adult cell to empty its nucleus into the egg cytoplasm. c. DNA repair enzymes repair all of the adult cell’s mutations before the cloned cell begins cell division. d. only the nucleus of the adult cell is injected into the egg cell. e. none of these things happen in somatic cell nuclear transfer
The process illustrated in the figure is a step in
a. the production of recombinant DNA. b. probing for transferred genes. c. DNA fingerprinting. d. sequencing DNA. e. producing radioactive probes.
Organic compounds break down spontaneously in the presence of ____
a. oxygen b. nitrogen c. hydrogen d. water vapor e. carbon dioxide