Allosteric enzymes
a. have regions that bind with inhibitor or
activator molecules.
b. are associated with important energycarrying
nucleotides.
c. are not affected by temperature or pH.
d. have two active sites.
e. have all of these
A
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Which of the following substances is secreted by an endocrine gland?
a. Tears b. Breast milk c. Wax d. Saliva e. Hormones
The yolk, which is in many animal eggs, is
composed of
a. a mixture of individual amino acids and nucleic acids. b. a mixture of proteins and lipids. c. a mixture of proteins and carbohydrates. d. a mixture of nucleic acids and proteins. e. a mixture of lipids and nucleic acids
Hormones are distributed throughout the body
by
a. the urinary system. b. the lymphatic system. c. the nervous system. d. the circulatory system. e. more than one of these systems
Someone who is heterozygous for a recessive genetic illness is said to be ________
A) a carrier B) pleiotropic C) epistatic D) allelic