The total genetic complement of ALL cells within a microbial community is called a(n)
A) chromosomal island.
B) interactome.
C) metagenome.
D) metabolome.
Answer: C
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Which compounds serve as major sources of energy for ruminant animals?
A) acetic acid and glucose B) acetic, butyric, and propionic acids C) dimethylsulfoniopropionate, gluconate, and protocatechuate D) glucose and sucrose
Energy-requiring reactions can occur in biological systems because they can be coupled with reactions that are
A) unlikely. B) not spontaneous. C) endergonic. D) exergonic. E) spontaneous and endergonic.
Answer the following questions true (T) or false (F)
1. Only eukaryotic cells depend on ATP. 2. Given enough time, sucrose can spontaneously break down into fructose and glucose in a glass of water. 3. Enzymes themselves are altered in the process of catalyzing chemical transformations.
The sigma subunit of bacterial RNA polymerase ___________________
(a) contains the catalytic activity of the polymerase. (b) remains part of the polymerase throughout transcription. (c) recognizes promoter sites in the DNA. (d) recognizes transcription termination sites in the DNA.