Most true fungi send out cellular filaments called ____
a. mycelia
b. hyphae
c. mycorrhizae
d. stolons
e. rhizoids
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.
Gases that are regulated by biological processes include:
a. oxygen. b. carbon dioxide. c. argon. d. Both a and b. e. Both b and c.
Which of the following is false about Marfan
syndrome? a. It results from an autosomal dominant mutation. b. The affected gene produces a defective form of the protein fibrillin. c. Aortas of Marfan's patients are susceptible to rupture. d. It affects one in five thousand men and women. e. None of these is false.
If 0.04% (0.0004) of the people in a population has sickle cell anemia, the percent of heterozygotes in the population
must be _____________________ percent. Fill in the blank(s) with the appropriate word(s).