Which strategy do viruses with small genomes, such as the MS2 phage, use to make their small genomes more efficient?
a. relying on the host to supply RNA replicase for replication
b. possessing overlapping genes that encode for multiple proteins
c. keeping the number of genes in their genome to a maximum of three
d. all of the above
Answer: B
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Enumerating cells in a biofilm is especially challenging for
A) microscopic direct counting. B) measuring turbidity. C) viability counts with spread plating. D) microscopic direct county, measuring turbidity, and viability counts with spread plating.
Where are the light-capturing pigments located in a chloroplast?
A. outer membrane B. inner membrane C. transitional membrane D. thylakoid membrane
Environmental effects have no impact on true-breeding, homozygous strains (inbred lines) of plants or animals
A. true B. false
Archbishop James Usher calculated the age of Earth based on the Old Testament. He estimated that the crea-tion of the world took place:
a. on exactly October 23, 4004 B.C. b. in 3998 B.C. c. between 75,000 and 2–3 million years ago. d. an inconceivably long time ago.