Amino acids are processed first by the removal of the amino group through
A. deamination.
B. deamination or transamination.
C. transamination.
D. phosphorolytic cleavage.
Answer: B
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The critical tissue for producing a vasodilatory effect of acetylcholine in Robert Furchgott's experiments with rabbit aortas was the
A. endothelium. B. smooth muscle layer. C. elastic outer layer. D. pericardium. E. one-way valves.
Members of the plant family Cactaceae (cacti) are native to the Americas and thrive in dry environments. They have a number of specialized adaptations, including reduced leaves, succulent (fleshy) stems for water storage, and spines for defense against herbivores. Some members of the family Euphorbiaceae are native to the African desert and resemble cacti, having similarly reduced leaves, succulent stems, and thorns. Other species in the Euphorbeaceae do not have these traits. Based on this information, what can you say about the morphological traits of Cactaceae and Euphorbiaceae indicated above?
A. They are shared primitive traits. B. They are shared derived traits. C. They are homologous traits. D. They are analogous traits.
Cartilage functions well as a cushioning structure because it is composed primarily of collagen fibers in a ground substance with a lot of water
Indicate whether the statement is true or false
The American kangaroo rat is characteristic of the desert biome. Indicate whether the statement is true or false