The molecule DNA contains a five-carbon sugar called
A) glucose.
B) fructose.
C) maltose.
D) ribose.
E) deoxyribose.
E
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The partial pressure of oxygen in the
a. atmospheric air averages 79% of total atmospheric pressure. b. blood is the most important factor that determines the extent to which O2 will combine with hemoglobin. c. arterial blood is decreased when hemoglobin preferentially combines with CO rather than O2. d. both (a) and (b) above. e. all of these answers.
The most important buffer system in the extracellular fluid is
A) carboxyl groups. B) chloride. C) monoprotonated phosphates. D) amino acids. E) bicarbonate.
The Latin term "hallucis" is used to refer to which of the following?
A. The wrist B. The head C. The big toe D. The ankle E. The thumb
Nonessencial amino acids are useless to the body.
a. true b. false