Three critical amino acids in the active site of an enzyme are arginine, lysine, and histidine. Which of the following characteristics would you predict the substrate to possess in order to bind the active site of this enzyme?
A. relatively hydrophobic
B. hydrophilic, with a negative charge
C. hydrophilic, with a positive charge
D. hydrophilic, but without a charge
B
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Opportunistic pathogens such as Legionella, Pseudomonas, and Mycobacterium species have the ability to grow within ________, which may enhance their ability to survive in water distribution systems
A) human saliva B) fish C) protists D) UV irradiated water
The non-adaptive mechanisms of evolutionary change are:
A. migration (gene flow), mutation, and genetic drift. B. migration (gene flow), balancing selection, and genetic drift. C. migration (gene flow), sexual selection, and genetic drift. D. mutation, sexual selection, and genetic drift. E. mutation, genetic drift, and heterozygote advantage.
A physician reports to you the lab results in identifying your genetic condition relating to your skin health. "DNA fingerprint" information indicates that you have two different versions of the allele for a particular skin protein, and this is called
a. heterozygous. b. homozygous. c. dominant. d. homologous. e. recessive.
Low sperm ____________________ results in the inability of sperm to move through cervical mucus and reach the
egg in the oviduct Fill in the blank(s) with the appropriate word(s).