DNA microarrays reveal
A) if any genes are mutated in a given cell.
B) if reverse transcriptase is present in a given cell.
C) which genes are being expressed in a given cell.
D) which genes are found in a given cell.
E) if a particular gene was acquired via horizontal gene transfer.
Answer: C
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The scientists who identified a set of coordinately regulated genes, called an operon, responsible for lactose metabolism in E. coli were
A) Watson and Crick. B) Meselson and Stahl. C) Jacob and Monod. D) Hershey and Chase.
What forces filtration at the glomerular capsule?
a) An increase in Glomerular blood pressure b) An increase in osmolarity of tubular fluid c) An decrease in angiotensinogen d) A decrease in Glomerular blood pressure
The sympathetic nervous system:a
is involved in restoring energy to the body. b. directs quiet, calm activities. c. is the only system that innervates the heart. d. is activated when there is a startling situation. e. is part of the somatic division.
A stable internal environment
What will be an ideal response?