Glucose is a(n):
a. octahedral carbon base.
b. six carbon sugar.
c. heptahedral sugar.
d. five carbon sugar.
e. strong polar ion.
B
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Why is the Lineweaver—Burk plot important in enzyme kinetics?
A) It is a single-reciprocal plot. B) It illustrates enzyme specificity. C) It reveals the presence of prosthetic groups in enzymes. D) It makes it easier to determine Vmax. E) It is nonlinear.
Why is it that the tongue and cheek epithelium doesn't provide a sufficient anaerobic environment for plaque anaerobes to grow, but the surface of teeth might?
A. The epithelium is supplied with oxygen by capillary beds. This makes it a relatively aerobic environment and hostile to anaerobes. B. The tooth enamel is supplied with oxygen by capillary beds. This makes it a relatively anaerobic environment and hostile to aerobes. C. The surface of the tongue and cheek are constantly scraped by the action of consuming food. Layers of bacterial growth that might help to supply an anaerobic environment are scraped away, exposing lower levels to oxygen-rich air. D. The surface of teeth (especially the molars) have many pits and crevices that can serve as 'pockets' for layers of bacteria to grow in. Once the layers get deep enough, the bottom portions are anaerobic. This isn't possible on the very smooth surface of the tongue and cheek epithelium.
The nervous system of fish includes:
a. olfactory pits. b. taste receptors. c. eyes. d. otoliths. e. all of the above.
Which of the following are found in the nucleus of an atom?
A) protons and neutrons B) neutrons C) protons D) electrons E) protons, neutrons, and electrons