Glial cells function to ____
a. conduct electrical impulses
b. support and nourish neurons
c. secrete collagen fibers into the extracellular matrix
d. release secretions from a free surface
e. move ions across the cell membrane
ANSWER: b
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What is the process in which impulses jump from node to node?
A. facilitated transmission B. refractory action C. incomplete transfer D. repolarization E. saltatory conduction
Why would it be better to transplant a plant with a ball of soil surrounding its roots?
a. The root hairs will remain intact. b. The nutrients will not escape from the roots. c. The plant is used to that particular soil. d. The weight of the soil helps the plant.
DNA replication
A) requires a type of RNA polymerase. B) is partially regulated by promoter/terminator sites. C) proceeds by making two continuous strands. D) is not edited once polymerization has occurred. E) is conservative.
What does it mean to align DNA sequences?
A. Place DNA sequences such that nucleotides are in the same relative position. B. Pair all of the same nucleotides together. C. To reconstruct a piece of DNA from multiple smaller sequences. D. To generate a complement of a DNA sequence.