You are a virologist interested in studying the evolution of viral genomes. You are studying two newly isolated viral strains and have sequenced their genomes. You find that the genome of strain 1 contains 25% A, 55% G, 20% C, and 10% T
You report that you have isolated a virus with a single-stranded DNA genome. Based on what evidence can you make this conclusion?
(a) single-stranded genomes always have a large percentage of purines
(b) using the formula: G – A = C + T
(c) Double-stranded genomes have equal amounts of A and T
(d) Single-stranded genomes have a higher rate of mutation
(c)
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The ability of cells to control their level of gene expression is called
A. gene transformation. B. gene regulation. C. gene splicing. D. gene addition. E. gene correction.
The class of an antibody is determined by the structure of its
a) antigen-binding site b) constant region c) variable region
Cyanogenic glycosides, which break down into cyanide, are toxic to cells because they inhibit the function of which organelle(s)?
A. Mitochondria B. Ribosome C. Nucleolus D. Endoplasmic reticulum E. Golgi apparatus
Industrial fermentation and fermentation in food production
A. are both processes in which sugars are oxidized to alcohols or acids. B. are processes in which sugar or protein is oxidized to produce alcohols or acids. C. use entirely different microorganisms. D. use entirely different starting material. E. make use of the same microorganisms.