Which of the following human digestive enzymes is NOT correctly matched to its substrate?
A. pepsin - protein
B. salivary amylase - starch
C. trypsin - nucleic acid
D. maltase - maltose
E. lipase - fat
Answer: C
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Some tentative patterns that are emerging from the study of complex traits are that:
A. some genes involved in complex traits are pleiotropic. B. many genes involved in complex traits show epistasis. C. most genes affecting complex traits have major effects; few have minor effects. D. genes involved in complex traits can show pleiotropy or epistasis. E. genes involved in complex traits can show pleiotropy or epistasis, and most have major affects.
Which of the following structures or molecular machines is important for protein degradation in eukaryotes?
A. cytoskeleton B. flagellum C. ribosome D. ATP synthase E. proteasome
During ventricular systole (contraction):
a. the ventricles relax. b. blood flows from the ventricles into the atria. c. the tricuspid and mitral valves are open. d. blood flows from the ventricles to the pulmonary artery and aorta. e. the atria contract.
The lymphoid tissues of the intestinal tract are collectively referred to as
A. thymus. B. tonsils. C. spleen. D. GALT. E. lymph nodes.