Polyploidy:a
may be the result of more than one sperm fertilizing an egg.
b. is not lethal in humans.
c. may be the result of the failure of a chromosome to separate during meiosis.
d. can be due to nondisjunction for a chromosome.
e. is the mechanism of dosage compensation.
a
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Which of the following reactions is most likely to be exergonic? Select all correct choices
A. the synthesis of a phospholipid from glycerol and fatty acids B. the replication of DNA from free nucleotides C. the formation of cellulose from individual glucose molecules D. the digestion of protein from food into amino acids
Since HIV attacks T cells, which type of immunity is affected in HIV-infected individuals?
a. innate b. antibody-mediated c. cell-mediated d. inflammation e. complement
Describe the steps of fertilizing an egg cell.
What will be an ideal response?
Which is incorrect about enzymes?
A. A noncompetitive inhibitor of enzymes interferes with the active site of the enzyme. B. In humans, extremely high fevers can be fatal because enzymes begin to unfold and stop working. C. Many drugs, like statin drugs, work by inhibiting key enzymes in cells. D. Enzymes need to have a precise shape to work correctly. E. Some enzymes can work in extreme temperatures or very low pH.