Hydrolysis of sucrose, a disaccharide, results in
A. two nucleotides.
B. two monomers.
C. two glycerol units.
D. the release of functional groups.
E. three monosaccharides.
Answer: B
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Which of the following statements best describes DNA polymerase?
A. It is an enzyme required to produce a primer needed for DNA replication. B. It is an enzyme that catalyzes the addition of nucleotides to the 5? end of a growing DNA strand. C. It is an enzyme that requires the presence of a small double-stranded nucleic acid primer to catalyze the addition of nucleotides to the 3? end of a growing DNA strand. D. It is an enzyme required to glue pieces of DNA fragments together. E. It is an enzyme that polymerizes to the DNA and keeps the replication fork open.
In autumn, the leaves of deciduous trees change colors. This is because chlorophyll is degraded and _____
A) carotenoids and other pigments are still present in the leaves B) the degraded chlorophyll changes into many other colors C) water supply to the leaves has been reduced D) sugars are sent to most of the cells of the leaves
The classification of bacteria has historically been based on
A) the means of locomotion and thickness of cell wall. B) microbial nutrition, physical appearance, and how they move. C) the appearance of colonies and rate of growth. D) pigments and presence of flagella. E) nutrient requirements and pigments.
A typical aerobic exercise prescription consists of 3-5 days/week for 20 or more minutes per session at 70-90% of maximal heart rate. More than this yields no improvements in fitness.
a. true b. false