The production of ATP in the mitochondria requires ____
a. ribosomes
b. oxygen
c. carbon dioxide
d. vesicles
e. DNA
ANSWER: b
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What is the difference in the bonding between alpha-helix and beta sheets?
A. Hydrogen bonding between the amides only occurs in one of these two types of secondary structures. B. Hydrogen bonding occurs between the amides of adjacent chains in the sheets instead of between the amides in different parts of the helices. C. Sulfur bridges allow the spring like turns in alpha helices and van der Waals dispersion allows the folds in beta sheets. D. Hydrogen bonding always occurs in the alpha helices but only occurs in parallel beta sheets.
A rapidly growing population is likely to have an age-structure diagram that is
a. bullet-shaped. b. in the shape of an inverted pyramid. c. shows significant bulges in the middle of the diagram. d. constantly changing its shape. e. in the form of a pyramid.
Galactosemia is an inherited disorder caused by ____ galactose
a. the overproduction of b. the excess break down of the protein c. the inability to break down d. metabolizing excess fat molecules and attaching them to e. the over-consumption of
A human population that is shrinking would be characterized by:
a. a large proportion of prereproductive individuals. b. a small proportion of prereproductive individuals. c. a large proportion of reproductive individuals. d. an equal number of individuals of all age groups. e. a small proportion of postreproductive individuals.