Why is cholesterol a critical component of the plasma membrane?
A) Cholesterol serves a role in cell recognition.
B) Cholesterol catalyzes metabolic reactions from its position within the plasma membrane.
C) Cholesterol transports certain molecules into the cell.
D) Cholesterol stabilizes the structure of the plasma membrane when the temperature changes.
Answer: D
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Virtually all of the protein or amino acid-based hormones exert their effects through intracellular ________.
A) ions B) deactivators C) nucleotides D) second messengers
Matching
A) Addison's disease B) Diabetes mellitus C) Graves' disease D) Acromegaly E) Pituitary dwarfism 11) An autoimmune problem involving the thyroid gland. 12) Hyposecretion of growth hormone. 13) Hyposecretion of the pancreas. 14) Hyposecretion of the adrenal cortex. 15) Hypersecretion of growth hormone
How many alleles exist for a given gene?
A) always one allele per gene B) only two C) each gene can have a different number of alleles D) two from each parent
The microscope field is the ________
A) area in which you place the microscope B) platform on which the slide rests C) space near the microscope where you sit D) area you see through the lenses of the microscope