In order to prevent hair loss in men, one popular treatment is to use an inhibitor of the enzyme that converts
testosterone to a different androgen (DHT). The inhibitors are steroids similar to testosterone that cannot be converted into
DHT. How would you classify this type of inhibition?
a. competitive inhibition
b. noncompetitive inhibition
c. allosteric inhibition
d. feedback inhibition
e. ionic inhibition
ANSWER: a
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What is the structural feature that allows DNA to replicate?
A) sugar-phosphate backbone B) complementary pairing of the nitrogenous bases C) disulfide bonding (bridging) of the two helixes D) twisting of the molecule to form an ?-helix E) three-component structure of the nucleotides
Which of the following is not true of the enzyme-substrate interaction?
A) Many enzymes are extremely specific regarding a substrate. B) Many enzymes cannot recognize a stereoisomer of their substrate. C) Some enzymes accept any of a whole group of substrates. D) Carboxypeptidase recognizes any of the amino acids from the carboxyl end of a polypeptide. E) Cells are often able to carry out metabolic activity with only a handful of enzymes.
In India, which age structure category holds the least number of individuals?
a. pre-reproductive b. early reproductive c. late reproductive
d. early post-reproductive e. late post-reproductive
Inheritance pattern in which an offspring has an intermediate phenotype, as when a red-flowered plant and a white-flowered plant produce pink-flowered offspring. ex. Curly hair
What will be an ideal response?