A type of DNA damage that may not be reversible is a _____
a) cross-linking
b) base change or loss
c) rung breakage
d) severed side rail
Ans: b) base change or loss
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Which is not true of a prokaryote cell?
a. it has a nucleus and membrane-bound organelles. b. it lacks membrane-bound organelles. c. it is always within a cell wall. d. it is always single cellular. e. it lacks chromosomes.
Blue light has energy than red light and is by a green leaf.
A. less; absorbed B. more; absorbed C. more; reflected D. less; reflected E. equal; reflected
Which of the following is NOT involved in self
versus nonself recognition? a. complement b. MHC markers c. TCRs d. plasma membranes e. HLA
One significant difference between anthropoids and other primates is the size of their:a
legs. b. arms. c. brains. d. spine. e. feet