56. Which of the following amino acid shares the same biosynthesis pathway of purine synthesis? (A) Glutamate (B) Histidine (C) Phenylalanine (D) Cystine (E) Lysine

56. Which of the following amino acid shares the same biosynthesis pathway of purine synthesis?
(A) Glutamate
(B) Histidine
(C) Phenylalanine
(D) Cystine
(E) Lysine

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統計： A(7), B(21), C(2), D(1), E(0) #3086679

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10. Which of the following descriptions about phosphorus cycle is NOT correct?(A)Over-enrichment of phosphate in both fresh and inshore marine waters can cause massive algae blooms that lead to eutrophication. (B) In terrestrial systems, bioavailable phosphorus mainly comes from weathering of phosphorus-containing rocks (C) Microbial and plant growths depend on the degradation rate of organic phosphorus to free inorganic phosphate by various enzymes such as phosphatases, nucleases and phytase. (D) Human interference in the phosphorus cycle occurs by overuse or careless use of phosphorus fertilizers. (E) Using animal manure in poorly drained soils to improve the soil fertility helps phosphorus cycle.

56. Which of the following amino acid shares the same biosynthesis pathway of purine synthesis?
(A) Glutamate
(B) Histidine
(C) Phenylalanine
(D) Cystine
(E) Lysine

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