The two types of bonding found in a DNA
molecule are
a. ionic and covalent.
b. covalent and peptide.
c. ionic and hydrogen.
d. peptide and hydrogen.
e. covalent and hydrogen
E
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In humans, male-pattern baldness may be assumed to be controlled by an autosomal gene that occurs in two allelic forms. Allele B determines nonbaldness, and allele b determines pattern baldness. In males, because of the presence of testosterone, allele b
is dominant over B. If a man and woman both with genotype Bb have a son, what is the chance that he will eventually be bald? A) 0% B) 25% C) 33% D) 50% E) 75%
The human circulatory system can be described as which of the following?
a. a closed system b. an open system c. a somatic response d. a voluntary process
The primitive Earth's atmosphere did NOT contain
a. free oxygen. b. free nitrogen. c. free hydrogen. d. water vapor. e. inert gases.
The nitrogenous base adenine is found in all members of which group?
A. proteins, triglycerides, and testosterone B. ? glucose, ATP, and DNA C. proteins, carbohydrates, and ATP D. proteins, ATP, and DNA E. ATP, RNA, and DNA