RNA molecules are usually found as
a. a two-stranded double helix.
b. a single strand with some folds and twists where the strand bonds with itself to make some
double-helical regions.
c. part of a pair with a single DNA strand.
d. a single strand that has no double-helical regions.
e. an extra strand joined to a DNA double helix.
B
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Canada geese have become a major source of Giardia and Cryptosporidium contamination of soil and fresh water.
Answer the following statement true (T) or false (F)
The oxidation of which macromolecule yields the most energy by weight?
a. lipids b. glycogen c. starch d. glucose e. protein
Which of the following statements about the insect exoskeleton is NOT true?
A. The insect exoskeleton grows with the organism. B. The insect exoskeleton has muscles attached to it from the inside of the body. C. The insect exoskeleton is made of a complex form of carbohydrate called chitin. D. The exoskeleton protects insects against predators and drying out. E. The insect exoskeleton is jointed and movable.
To prepare large volumes of influenza virus for use in the flu vaccines each year, the virus is grown in embryonated hen eggs. This is an example of the use of
A. selective media. B. enriched media. C. live media. D. complex media.