Receptors for polar molecules are found ____, while receptors for nonpolar molecules are located ____
a. on the cell surface; within the cell
b. within the cell; on the cell surface
c. on the cell surface; on the nuclear membrane
d. on the nuclear membrane; on the cell surface
e. on the cell surface; within the lipid bilayer
ANSWER: a
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How do sphagnum mosses contribute to the carbon cycle? Select all correct choices
A. As decomposers, they release large amounts of CO2 into the atmosphere. B. They produce phenols, which release the carbon stored in peat bogs. C. As heterotrophs, they remove large amounts of CO2 from the atmosphere. D. They produce protons, which limit decomposition and CO2 production in peat bogs.
In a cow's udder, milk
A. contains Lactococcus. B. contains Lactobacillus. C. is acidic. D. is sterile.
The dominant Huntington disease allele causes severe neural/brain damage at approximately age 40. A female whose mother has Huntington disease marries a male whose parents are normal. It is not known if the female has the disease. Keeping in mind that the disease allele is rare in the population, what is the probability that their firstborn will inherit the gene that causes Huntington disease?
A) 25% B) 50% C) 75% D) 100% E) 0%
Potassium deficiency
What will be an ideal response?