Patients with pyruvate dehydrogenase complex deficiency develop neurological symptoms. Patients with this disease
fail to make the substrates required for which metabolic process?
a. pyruvate oxidation
b. oxidative phosphorylation
c. glycolysis
d. the citric acid cycle
e. fatty acid oxidation
ANSWER: d
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____ describes the process by which molecules of a substance will move from regions of high concentration to regions of low concentration (until an equilibrium is reached)
Fill in the blank with the appropriate word.
Carbon and hydrogen have similar electronegativities and combine together to form hydrocarbon molecules. What type of bonds form between these atoms?
A. hydrogen. B. ionic. C. polar covalent. D. nonpolar covalent. E. electrostatic.
Which of the following was an early tetrapod that differed from fishes in part by having a neck, and for which nearly complete skeletal data are available from fossils?
a. Anolis b. Dunkleosteus c. Archaeopteryx d. Ichthyostega
A metastasis is _________
(a) a secondary tumor in a different part of the body that arises from a cell from the primary tumor. (b) a cell that is dividing in defiance of normal constraints. (c) a part of the primary tumor that has invaded the surrounding tissue. (d) the portion of the cancerous tumor that displays genetic instability.