Which of the following is not true about enzymes?
A) Enzymes are used up in a chemical reaction.
B) Enzymes are made of proteins.
C) Enzymes lower the activation energy of a reaction.
D) Enzymes increase the probability a reaction.
E) None of the above.
A) Enzymes are used up in a chemical reaction.
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EMB agar preferentially selects for the growth of ________ bacteria
A) gram-positive B) gram-negative C) gram-variable D) both gram-positive and gram-negative
Applying a chemical to the surface of the laboratory bench to remove the contaminating microorganisms is considered:
a. sterilization. b. disinfection. c. decontamination. d. pasteurization.
Choose the one most appropriate statement for each.
A. Peristalsis B. Sphincter C. Serosa D. Cud E. Bile salts F. Ruminants G. Mucosa H. I. Gastric fluid J. Chyme
Biologists are studying two species whose DNA is known to differ by 10%. Which information would be least important in calibrating a molecular clock to determine how rapidly evolution has proceeded with these two species?
A) the fossil record of these two species B) a geological event that separated the species at a particular time C) the function of each of these regions of DNA D) the time of divergence of closely related species