Temporal gene regulation refers to which of the following circumstances?
a. Certain genes are induced only at a particular point in the organism’s life cycle.
b. Certain genes are induced only in specific tissues.
c. Heat-shock genes are induced during periods of temperature stress.
d. "Housekeeping" genes are induced in response to a viral infection.
e. Molecular chaperones are synthesized after heavy-metal ingestion.
a
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Although Sulfolobus solfataricus grows at pH 2 to 4, it maintains a cytoplasmic pH of about 2, thereby generating a large pH gradient across the plasma membrane.
Answer the following statement true (T) or false (F)
Which cloning vector should be used to express a 500-kb DNA fragment in Saccharomyces cerevisiae?
A. BAC B. ?1059 C. YAC D. pUC19
When a molecule of NAD+ (nicotinamide adenine dinucleotide) gains a hydrogen atom (not a proton), the molecule becomes _____
A) dehydrogenated B) oxidized C) reduced D) redoxed
A calorie is the commonly used unit of chemical energy. It is also the unit of
A. magnetism. B. sound. C. heat. D. light. E. radioactivity.