The enzyme used by HIV that allows it to make DNA from RNA is
a. DNA ligase.
b. helicase.
c. restriction endonuclease.
d. reverse transcriptase.
e. cholinesterase.
D
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During exhalation, the chest cavity ____ in size, which causes air pressure in the lungs to ____
a. increases; increase b. decreases; decrease c. increases; decrease d. decreases; increase e. expands; remain the same
Sea turtles lay their eggs in the sand on the beach. When the sea turtle eggs hatch, the babies migrate to the water without any assistance from the parent. This behavior, in which they are born with, is known as
A. All of the answer choices are correct. B. behavior learned by observation. C. innate behavior. D. learned behavior. E. habituation.
"Before you just dump that enzyme-active presoak into the washing machine, be sure to ____________ so it will do a better job."
A. rub it into the stained area to increase enzyme-substrate contact B. turn up the water temperature to boiling to get the enzyme molecules moving faster C. add chlorine bleach to the enzyme D. dilute the enzyme with water
Which of the following chemical substances contributes to the unique characteristics of acid-fast bacteria?
A) N-acetylglucosamine B) peptidoglycan C) lipoteichoic acid D) endotoxin E) mycolic acid