Which of the following statements about evolution is true?
A) Evolution can proceed to a limited extent without the occurrence of mutation.
B) Evolution involves maintaining a constant frequency of alleles in the gene pool.
C) Populations evolve.
D) Individuals evolve.
Answer: C
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Which of the following statements is true about enzyme-catalyzed reactions?
A) The reaction is faster than the same reaction in the absence of the enzyme. B) The free energy change of the reaction is opposite from the reaction that occurs in the absence of the enzyme. C) An enzyme catalyzes a reaction by raising the activation energy. D) Enzyme-catalyzed reactions require energy to activate the enzyme. E) Enzyme-catalyzed reactions release more free energy than noncatalyzed reactions.
Which of the following is one of the best examples of a commonly shared signaling pathway
connected to memory in invertebrates and vertebrates?
a. Cyclic AMP. b. Cycling RNA c. RNA cyclase. d. RNA binding protein e. non-responsive binding protein
Plants in which the fruit is known as a grain undergo a process during germination that produces amylase. This process is
a. abscission. b. Guttation. c. malting. d. scarification. e. desiccation.
The advantage of being able to clone the gene for human insulin is that
A) there are too few cows, pigs, and horses to provide an adequate supply of their insulin. B) human insulin is less likely to cause harmful side effects than cow, pig, or horse insulin. C) cow, pig, or horse insulin cannot keep a diabetic alive for more than 3 months. D) using human insulin increases the probability that, in the future, the person suffering from diabetes can be weaned from a dependence on insulin.