The rapid depolarization phase of the action potentials of myocardial contractile cells is due to which ions?
A. Ca2+ only
B. K+ only
C. Na+ only
D. Both Ca2+ and K+
E. Both Na+ and K+
Answer: C. Na+ only
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A complex consisting of a single mRNA molecule with several ribosomes is called a
A. multisome. B. proteosome. C. maxisome. D. polysome.
How are NADH and FADH2 related?
a. They both directly produce ATP. b. They are both used in glycolysis. c. They both contain high energy phosphates. d. They both contain high energy electrons. e. They are both in the oxidized form.
If a mixture of bacteriophages, some labeled with radioactive sulfur and others labeled with radioactive phosphorus, is
placed in a bacterial culture, the bacteria will eventually contain ____.
a. primarily radioactive sulfur b. primarily radioactive phosphorus c. both radioactive sulfur and phosphorus d. neither radioactive sulfur nor radioactive phosphorus e. complete viruses with radioactive sulfur coats
The flattened or scale-like cells that make up certain epithelial tissues are known as ________ cells
Fill in the blank(s) with correct word