Amniocentesis is
a. a surgical means of repairing deformities.
b. a form of chemotherapy that modifies or
inhibits gene expression or the function of
gene product.
c. used in prenatal diagnosis to detect
chromosomal mutations and genetic
disorders in embryos.
d. a form of gene replacement therapy.
e. all of these.
C
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While on the H.M.S. Beagle, Darwin observed that ____
a. organisms on the Galápagos Islands resembled species on the mainland b. armadillos and glyptodonts coexisted in some habitats but not others c. similar organisms colonized similar habitats in South America and Europe d. organisms in different South American habitats resembled each other, but did not resemble organisms in similar European habitats e. no organisms resembled fossilized extinct animals
Depolarization of the neuron plasma membrane occurs due to
a. the diffusion of K+ into the cell. b. the diffusion of K+ out of the cell. c. the diffusion of Na+ into the cell. d. the diffusion of Na+ out of the cell. e. closed gated channels.
Which of the following herpesvirus infections would be potentially most serious?
a. a whitlow b. ocular herpes c. shingles d. cytomegalovirus in fetuses
A ________________ is a protective protein coat that surrounds the nucleic acid of the virus.
A. Capsid B. DNA C. Pathogen D. Epidemic