Which term refers to the first explanation of a problem (sometimes referred to an "educated guess")?
A. Principle
B. Law
C. Theory
D. Fact
E. Hypothesis
Answer: E
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The regular fluctuations in size of animal populations are termed _____
I) population cycles II) population dynamics III) growth factors A) only I B) only II C) only III D) only II and III E) I, II, and III
Unsaturated fats
a. are solid at room temperature b. have at least one double bond in their fatty acid tail c. are saturated with hydrogens d. mainly come from animals. e. consist of straight chain fatty acids
Most of the earth’s usable carbon is in its
a. crust. b. atmosphere. c. biomass. d. oceans. e. mantle.
A current problem in modern medicine is the development of drug resistance mutations. This occurs when a mutation arises in a disease-causing microbe making it resistant to a drug and thus rendering the drug useless in treating a specific disease. Many useful drugs are competitive inhibitors of specific enzymes, and the drug-resistance mutations prevent the binding of the drug. These types of mutations, in addition to preventing competitive inhibitor binding, can also sometimes reduce the activity of the enzyme. Why is that the case?
A. These mutations most likely affect an allosteric site on the enzyme B. These mutations lower the activation energy of the reaction catalyzed by the enzyme C. These mutations most likely change the shape of the active site of the enzyme D. Binding to the competitive inhibitor is essential for the function of the enzyme