The genome of which of the following types of animal virus can act directly as mRNA?
A) retroviruses
B) +ssRNA viruses
C) -ssRNA viruses
D) ssDNA viruses
E) dsRNA viruses
B
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Before nitrogenous wastes are excreted in
urine, they are converted first to ___ and then to ___.
a. urea--ammonia b. ammonia--urea c. glycogen--monosaccharides d. glycerin--fatty acids e. glyerin--urea
Which of the following is not a structure used for bacterial adhesion?
A. Fimbriae B. Adhesive slime or capsules C. Specialized receptors D. Surface proteins E. Cilia
Which of the following doesn't involve molecules moving across cell membranes?
a) diffusion b) osmosis c) facilitated diffusion d) active transport e) induced fit
Suppose one strand of a "mini-gene" has the base sequence TACCCGGATTCA. The last codon in the mRNA sequence will be
A) TCA. B) UGA. C) AGT. D) AGU.