Action potentials are propagated along a(n) ____
a. sodium channel
b. axon in two directions
c. gated channel
d. axon in one direction
e. dendrite
ANSWER: d
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Which of the following mechanisms would most likely be involved in repairing a single point mutation?
A. mismatch repair B. base excision repair C. nucleotide excision repair D. base excision repair and/or nucleotide excision repair E. mismatch repair and or base excision repair
In a frog in which the diploid number of chromosomes per cell is 24, what is the total number of
chromatids present per cell in Prophase II after the first division and cytokinesis?
a. 0 b. 6 c. 12 d. 24 e. 48
What is the net movement of molecules from an area of higher concentration to an area of lower concentration?
a. Osmosis b. Diffusion c. Redox-reaction d. Electron transfer chain e. Metabolic pathway
Which of the following is the proper sequence
for mitosis? I. metaphase II. telophase III. prophase IV. anaphase
a. II, I, IV, III b. I, II, III, IV c. III, I, IV, II d. IV, III, II, I e. I, IV, II, III