What happens to a molecule when it is phosphorylated?
a. It loses energy.
b. It receives a phosphate group.
c. It becomes denatured.
d. It loses electrons and protons.
e. It gains electrons.
ANSWER: b
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Fill in the blank(s) with the appropriate word(s).
Bacterial biofilms are important medically because they
A. All of the answer choices are correct. B. can create resistance to treatment with antibiotics. C. can form dental plaque. D. may form on catheters. E. are resistant to immune defenses.
Which of the following statements is true?
a. Gene mutations occur independently of each other. b. Gene mutations are relatively rare. c. Ionizing radiation causes chromosomal damage and free radical formation. d. Mutations are random; that is, it is impossible to predict exactly when a specific gene will mutate, but an expected frequency can be assigned. e. All of these are true.
Nitrogenase and Oxygen
What will be an ideal response?