In capillary exchange, where does osmosis take
place?
a. at the arterial end
b. along the entire length of the capillary
c. at the venous end
d. in the middle part of the capillary
e. osmosis does not take place in capillary
exchange
C
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A stroke occurs when blood flow to a region of the brain is interrupted, damaging the cells in that region. What symptoms might you see if a person suffered a stroke in their cerebellum?
A. loss of sensory perception B. visual impairment C. difficulty speaking D. loss of balance and coordination
The greater the polyglutamine expansion in the huntingtin gene (greater than 35 CAG trinucleotide repeats), the greater the chance for developing Huntington disease
a. True b. False Indicate whether the statement is true or false
Does this experiment support or refute the conclusion that prairie dogs are a keystone species? a. It seems to refute the conclusion that prairie dogs are a keystone species because otherspecies declined after prairie dogs re-established
b. It seems to support the conclusion that prairie dogs are a keystone species because otherspecies declined after prairie dogs re-established. c. It seems to support the conclusion that prairie dogs are a keystone species because otherspecies increased after prairie dogs re-established. d. None of the above (because the results were inconclusive).
RNA and proteins combine in cells to form structures called ribosomes. Ribosomes contain the active site for peptide bond formation. Based on their chemical structures, do you think protein or RNA molecules actually form the active site within the ribosom
A) protein, because RNA cannot catalyze reactions B) RNA, because proteins cannot catalyze a reaction that involves another protein C) proteins, because only proteins can catalyze a reaction that involves another protein D) It could be either, because both molecules have catalytic properties.