7. What is the overall net charge on the peptide D-F-A-R-I-G at pH 7.0? (A) +2 (B) +1 (C) 0 (D) -1 (E) -2.

7. What is the overall net charge on the peptide D-F-A-R-I-G at pH 7.0?
(A) +2
(B) +1
(C) 0
(D) -1
(E) -2.

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B1 · 2025/10/18

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1. 題目解析要計算肽 D-F-A-R...

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17. We have two enzymes maltose phosphorylase and sucrose phosphorylase catalyzing the following reactions: With the presence of unlabeled G-1-P and sucrose phosphorylase in an isotope-labeled 32P； solution, we found the "P" on G-1-P can also be isotope-labeled after some time. However, maltose phosphorylase cannot do the same. Which of following is true: (A) Sucrose phosphorylase catalyzes a reaction following double-displacement mechanism (B) Sucrose phosphorylase catalyzes a reaction requiring the formation of tertiary complexes (C) Maltose phosphorylase catalyzes a reaction following what is called "Ping-Pong mechanism" (D) Maltose phosphorylase catalyzes a reaction where enzyme is covalently modified during the catalysis though the modification occurs only transiently (E) NAD+-dependent dehydrogenases use a random single-displacement catalytic mechanism

7. What is the overall net charge on the peptide D-F-A-R-I-G at pH 7.0?
(A) +2
(B) +1
(C) 0
(D) -1
(E) -2.

詳解 (共 1 筆)

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