Science is
A. an organized study of information.
B. impossible to define.
C. a process for collecting and organizing knowledge.
D. the study of life.
C. a process for collecting and organizing knowledge.
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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
A potent neurtoxin that causes paralytic shellfish poisoning in coastal temperate North America is produced by ________.
A. dinoflagellates B. green algae C. red algae D. diatoms
The cardiac conduction system consists of
a. the sinoatrial node. b. the atrioventricular node. c. junctional fibers. d. a branching bundle of fibers. e. all of these.
In the DNA instruction manual, what do typographical errors represent as the DNA manual is rewritten?