Eukaryotic chromosomes consist of:
a. circular DNA molecules complexed with positively charged nonhistone proteins.
b. circular DNA molecules complexed with negatively charged histone proteins.
c. linear DNA molecules complexed with positively charged histone proteins.
d. linear DNA molecules complexed with negatively charged histone proteins.
e. circular DNA molecules folded to fit inside a bacterial cell.
c
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Immunodiffusion tests
A. allow detection of specific antigens. B. are a simple method that produces visible results in the zone of optimal proportion. C. allow quantitation of antigen concentrations. D. All of the choices are correct.
Charles Darwin and his son experimented with which plant growth response?
A. gravitropism B. circadian rhythms C. phototropism D. heat shock E. thermotropism
Refer to the accompanying figure. The peak in ____ around day 21 corresponds with ____
a. luteinizing hormone; ovulation
b. follicle-stimulating hormone; the development of the follicle
c. estrogen; breakdown of the endometrium
d. progesterone; continuing to build up the endometrium
e. estrogen; ovulation
When an encapsulated bacteria loses the ability to form capsules, it almost always loses its pathogenicity.
A) True B) False