Cellular receptors may be composed of
A) proteins.
B) carbohydrates.
C) lipids.
D) combinations of proteins, carbohydrates, and/or lipids.
Answer: D
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Consider the following reaction at equilibrium: What would be the effect of adding additional H2CO3?
A) It would drive the equilibrium dynamics to the right. B) It would drive the equilibrium dynamics to the left. C) Nothing would happen, because the reactants and products are in equilibrium. D) The amounts of CO2 and H2O would decrease.
Describe the events that occur during metaphase
What will be an ideal response?
The scissors in the figure represent
a. restriction enzymes. b. reverse transcriptases. c. DNA polymerases. d. RNA polymerases. e. DNA ligases.
The stomach differs from the small intestine in that it
A) secretes enzymes. B) produces enzymes that work best at a low pH. C) secretes hormones that travel through the bloodstream. D) has tiny projections called villi that are folded into microvilli. E) does not secrete mucus.