18. A sequence of amino acids in a certain protein is found to be –Ser–Gly–Pro–Gly–. The sequence is most probably part of a(n) _____. (A) antiparallel β sheet (B) parallel β sheet (C) α helix (D) α sheet (E) β turn

18. A sequence of amino acids in a certain protein is found to be –Ser–Gly–Pro–Gly–. The sequence is most probably part of a(n) _____.
(A) antiparallel β sheet
(B) parallel β sheet
(C) α helix
(D) α sheet
(E) β turn

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統計： A(1), B(4), C(3), D(1), E(55) #3224799

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Celeste

B1 · 2025/02/08

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序列 Ser-Gly-Pro-Gly...

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51. Which of the following statements about genetically modification is FALSE? (A) Bt (Bacillus thuringiensis) maize is a genetically modified organism (GMO) with a transgene encoding Bt toxin, which can prevent maize from insect feeding. (B) Golden rice is a GMO created to address vitamin A deficiency. (C) Soil bacteria Agrobacterium is commonly used as a tool for transferring exogenous genes into plants for GMO generation. (D) Purple sweet potatoes are GMOs in which anthocyanin biosynthetic genes are overexpressed. (E) Papaya in Hawaii is genetically engineered for resistance to a ringspot virus.

18. A sequence of amino acids in a certain protein is found to be –Ser–Gly–Pro–Gly–. The sequence is most probably part of a(n) _____.
(A) antiparallel β sheet
(B) parallel β sheet
(C) α helix
(D) α sheet
(E) β turn

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