Gene regulation by siRNA is ____ in eukaryotes and may have evolved originally as a ____
A. rare; way to regulate gene expression
B. widespread; way to regulate gene
expression
C. rare; defense against mutations that may
cause cancer
D. widespread; defense against viruses
E. rare; defense against viruses
D
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ATP is called the "energy currency" of the cell
because it
a. looks like money. b. accumulates in the body and is stored for emergency use. c. can be made into nucleic acids. d. can be reused when it is energized during phosphorylation. e. is never out-of-date
How is summation related to IPSPs and EPSPs? What is the difference between temporal summation and spatial
summation? What will be an ideal response?
Where are the Galápagos Islands?
A) Near the center of the south Atlantic Ocean B) Off the west coast of North America C) Off the northwest coast of South America D) Off the west coast of Australia E) Near Southeast Asia
At the end of the Gram stain, gram-positive bacteria will be seen as pink cells.
a. true b. false