The plant hormone ____ is a gas at normal temperature and pressure
a. abscisic acid
b. ethylene
c. auxin
d. salicylic acid
e. systemin
ANSWER: b
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How does DNA fit inside the nucleus of a eukaryotic cell?
a. The cell breaks the strands apart to form nucleosomes. b. The DNA is wrapped around histones to form nucleosomes. c. The DNA is supercoiled beyond the double helix structure. d. The cell scaffolds the strands to make them more compact.
Cellulose is composed of monomers of:
A. ribose B. deoxyribose C. ?-glucose D. ?-glucose
Land next to the sea has more variable climate than land farther from the sea.
Answer the following statement true (T) or false (F)
What feature of mycobacteria is responsible for the unusually slow growth of these bacteria?
A) Their low tolerance for oxygen retards their growth. B) They cannot fully metabolize carbohydrates and must rely on fermentation. C) They have limited numbers of ribosomes so protein production is slow. D) The mycolic acid in their cell walls requires signification metabolic investment. E) They lack a cell wall and are extremely fragile.