Which of the following is NOT true of enzyme
behavior?
a. Enzyme shape may change during catalysis.
b. The active site of an enzyme orients its
substrate molecules, thereby promoting
interaction of their reactive parts.
c. All enzymes have an active site where
substrates are temporarily bound.
d. Each enzyme can catalyze a wide variety of
different reactions.
e. Enzymes make reactions occur at a faster
rate.
D
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What would you expect to observe in a species with a promiscuous mating system?
A. Intrasexual selection is very strong, with larger females. B. Intrasexual selection is very strong, with larger males. C. A female mates with a different male in every breeding season. D. Males remain with females to help raise young. E. Females interfere with any attempts by males to mate with other females.
The part of the brain that connects the spinal cord with the forebrain is the:
a. cerebrum b. pons c. cerebellum d. fissure of Rolando e. hypothalamus
Why would exercise immediately help blood circulation in your legs?
A. As muscles contract, they squeeze blood through the veins and increased heart rate pushes more blood into the legs. B. Increased heart rate pushes more blood into the legs. C. As muscles contract, they squeeze blood through the veins. D. Exercise increases the amount of red blood cells. E. Exercise increases the amount of red blood cells and increased heart rate pushes more blood into the legs.
Which statement is false concerning X chromosome inactivation?
A. It is an accident of evolution. B. It is an example of dosage compensation. C. It is a gene control mechanism. D. It is responsible for the normal development of female embryos. E. It does not occur in males.