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

Biology & Microbiology

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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

Biology & Microbiology

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

Biology & Microbiology

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

Biology & Microbiology

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.

Biology & Microbiology