Which of the following can directly participate in creating the binding specificity of an enzyme active site? Choose all that apply
A. hydrophobic amino acid side chains
B. hydrophilic amino acid side chains
C. alpha helical regions of the polypeptide
D. beta-sheet regions of the polypeptide
E. negatively charged amino acid side chains
F. positively charged amino acid side chains
A,B,E,F
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Based on Figure 24.10, which of the following statements are true?
A. Neanderthals are more closely related to the French than to other groups. B. Neanderthals are more closely related to the Chinese than to other groups. C. Neanderthals are more closely related to the Melanesians than to other groups. D. Neanderthals are more closely related to the Nigerians than to other groups. E. Neanderthals are equally related to all non -African groups.
Amino acids that contain many methyl (-CH3) groups
A. are considered hydrophilic. B. are non-polar. C. carry a positive charge. D. carry a negative charge. E. are considered hydrophilic AND carry a positive charge.
Animals that use an exoskeleton for movement include
_____ crustaceans. _____ cnidarians. _____ reptiles. _____ insects. _____ protists.
Generation time increasing with body size is least likely in _______
a. bacteria b. plants c. animals d. protists e. fungi