Proteins that block the passage of RNA polymerase are called:
a. promoters
b. activators
c. operons
d. enhancers
e. repressors
Ans: e. repressors
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Which two animals are both classified as suspension feeders?
a. clams and aphids b. clams and fiddler crabs c. lampreys and rabbits d. lampreys and rabbits e. whales and clams
The bond in table salt (NaCl) is ____
a. polar b. ionic c. covalent d. double e. nonpolar
All of the following statements about neurotransmitters are generally true EXCEPT:
(A) They may cause depolarization or hyperpolarization of the postsynaptic membrane. (B) They are actively transported across the synaptic cleft. (C) They are released from membrane-bound packets called vesicles. (D) They may be enzymatically degraded at the postsynaptic membrane. (E) They bind to specific receptors on the postsynaptic membrane.
If genes A, B and C independently assort, what type(s) of gametes would a parent with the aaBbCC genotype make?
a) aaBbCC b) aBC only c) abC only d) aBC or abC