The following steps occur during multiplication of retroviruses. Which is the fourth step?
A) synthesis of double-stranded DNA
B) synthesis of +RNA
C) attachment
D) penetration
E) uncoating
Answer: A) synthesis of double-stranded DNA
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Salps play an important ecological role as consumers of:
a. bacteria. b. diatoms. c. krill. d. fish larvae. e. jellyfish.
Atoms that have the same number of protons but differ in the number of neutrons are called ________
Fill in the blank(s) with correct word
A mutation in the laci gene that makes the repressor unable to bind lactose will result in:
A: increased synthesis of b-galactocidase only when glucose is low. B: repression of b-galactocidase synthesis under all growth conditions. C: constitutive (constant) synthesis of some b-galactocidase. D: all of the above
After 20 years on the road, Roger recently retired as the drummer of a rock band. It didn't take long for Roger to realize that he was unable to hear as well as he used to. Roger's diminished hearing is most likely due to damage of
A) the tympanic membrane. B) the hammer and anvil. C) hair cells. D) corpuscles. E) the auditory nerve.