Which of the following best describes a polymerase?
a. It is an enzyme that blocks the formation of nucleic acids.
b. It is an enzyme that slows the formation of DNA.
c. It is an enzyme that catalyzes the formation of nucleic acids.
d. It is a ribosome that catalyzes the formation of nucleic acids.
Ans: c. It is an enzyme that catalyzes the formation of nucleic acids.
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The MOST effective antibiotics in preventing growth of disease-causing bacteria are
A) bacteriocidal. B) bacteriostatic. C) bacteriolytic. D) bacteriolytic or bacteriocidal.
Would you be willing to pay extra for a vehicle that runs on biofuels?
1.Yes, because biofuels are made from renewable energy sources and have lower emissions. 2.No, because the environmental benefits do not outweigh the personal costs.
Which of the following is not a characteristic of a sustainable society?
A. mass transit B. multi-use farming C. recycling and composting D. integrated pest management E. draining of wetlands for housing
Which type of bacterial toxin is matched incorrectly with its description?
A) toxemia: a toxin produced during a viral infection B) type 3 exotoxin: bind to a membrane receptor then enter the cell C) type 2 exotoxin: disrupt and damage the host cell membrane leading to cell lysis D) type 1 exotoxin: bind to the targeted host cell at a membrane receptor but do not enter the cell E) endotoxin: enters the bloodstream during infection with Gram-negative bacteria