The first phase of glycolysis requires the input of two ATP molecules. It is therefore:
A. endergonic.
B. exergonic.
C. oxidative.
D. reducing.
E. None of the answer options is correct.
A
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When an enzyme has been denatured, it has been _______.
a. used up b. recycled c. rendered non-functional d. produced
Reproductive success of an organism is best measured by its
A) fitness. B) ability to attract a mate. C) number of offspring that survive to reproduce. D) life span.
The nematocysts of sea slugs should be most effective at protecting individual sea slugs from predation if the predators _____
A) remove small bites of flesh from sea slugs and have long-term memory B) remove small bites of flesh from sea slugs and have no long-term memory C) consume entire sea slugs in one gulp and have no long-term memory D) consume entire sea slugs in one gulp and have long-term memory
Which of the following statements about allostery is true?
(a) Allosteric regulators are often products of other chemical reactions in the same biochemical pathway. (b) Allosteric regulation is always used for negative regulation of enzyme activity. (c) Enzymes are the only types of proteins that are subject to allosteric regulation. (d) Binding of allosteric molecules usually locks an enzyme in its current conformation, such that the enzyme cannot adopt a different conformation.