Allosteric enzymes
A. may bind two substrates.
B. are used to bind to other enzymes.
C. have an additional binding site that is involved in regulating enzyme activity.
D.
are twice as fast as single-site enzymes.
E.
may bind two substrates AND are twice as fast as single-site enzymes.
C
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The __________, a forebrain region, is structurally
and functionally linked with the pituitary gland as a major center for __________ control. Fill in the blank(s) with the appropriate word(s).
If the epithelium that lines the air sacs of your lungs were to gain a layer of cells, which of the following would likely occur to the rate of oxygen diffusion?
A) Oxygen will diffuse across the lung surface more quickly. B) Oxygen will diffuse across the lung surface more slowly. C) Oxygen will diffuse across the lung surface out of, instead of into, the body. D) Oxygen will diffuse across the lung surface at a normal rate because it is only the shape of the cells that affect diffusion rate.
Which of the following statements about DNA is FALSE?
A. A eukaryotic genome is made up of many DNA molecules. B. A strand of DNA is made up of many nucleotides. C. One chromosome is made up of many DNA molecules. D. A DNA double helix contains both covalent bonds and hydrogen bonds. E. All of these are TRUE.
A hypothetical mutation in a squirrel population produces organisms with eight legs rather than four. Further, these mutant squirrels survive, successfully invade new habitats, and eventually give rise to a new species. The initial event giving rise to extra legs would be a good example of
A) punctuated equilibrium. B) species selection. C) habitat selection. D) changes in homeotic genes. E) allometry.