41. The endoplasmic reticulum bound enzyme that hydrolyzes glucose-6-phosphate to glucose in liver is:
(A)glucokinase.
(B) glucose oxidase.
(C)hexokinase.
(D). phosphoglucomutase.
(E)glucose-6-phosphatase.

1. What makes carbon such an abundant element in biomolecules? (A)It can form up to five bonds by sharing its electrons. (B) It forms only single bonds. (C)It provides low bond energy. (D)It forms stable covalent bonds by electron pair sharing. (E)It does not usually bond to other carbons, allowing a more diverse combination of elements.

2. Arrays of filaments in eukaryotic cells that give the cell its shape and its capacity to move are called the: (A)plasma membrane. (B) smooth endoplasmic reticulum. (C) cytoskeleton(D) lysosome.(E)Golgi body.

3. All of the following functions of an enzyme are true EXCEPT:(A) Enzymes help to catalyze virtually every metabolic reaction.(B) Enzymes mediate the rates of cellular reaction in proportion to cellular requirements.(C) Enzymes are sensitive to temperature, pH, and concentration changes.(D) An increased activity of an enzyme increases the amount of energy produced.(E) Enzymes are used as a catalyst to increase reaction rates many orders of magnitude.

4. Buffers have all of the following characteristics EXCEPT: (A) They have relatively flat titration curves at the pH(s) where they buffer. (B) They resist changes in their pH as acid or base is added. (C)They are typically composed of a weak acid and its conjugate base. (D) They buffer best for polyprotic acids half-way between the two pKa values. (E)Buffer where the amounts of conjugate base are nearly equivalent to the amounts of weak acid.

5. The hydrolysis of a phosphate from which of the following molecules is most thermodynamically favorable?(A) ADP (B) glucose phosphate (C)adenosine-5'-diphosphate (D)phosphoenolpyruvate (E)adenosine-5'-triphosphate

6. To predict whether pairs of coupled reactions will proceed spontancously: (A)Subtract the smaller from the larger △G. (B) Sum the for each reaction. (C)Add the △S values for each reaction at constant temperature. (D)The absolute value of the positive must be larger than the value of the negative .(E)None are true.

7. The difference between serine and homoserine is the same as between cysteine and homocysteine. This change from the common amino acid is: (A)one additional -CH2- group.(B) one additional -COOH group. (C)two additional -NH2 groups.(D) presence of a ring system. (E)one additional -NH2 group.

8. All of the amino acids EXCEPT________have both free o-amino and free a-carboxyl groups.(A)aspartic acid(B)proline(C)asparagine(D)lysine(E)valine

9. The amino acid with a side-chain pKa near neutrality and which therefore plays an important role as proton donor and acceptor in many enzyme catalyzed reactions is:(A)histidine.(B)cysteine.(C)proline.(D)serine.(E)methionine.

10. Ninhydrin has all these properties EXCEPT: (A)It reacts with an amino acid by oxidatively deaminating its amino group. (B) It can be used to detect the location of amino acids following chromatography. (C)It produces a purple colored product upon reaction with alanine.(D)  It produces a yellow product upon reaction with histidine. (E)It can be used to quantify most amino acids.

115年 - [無官方正解]115 國立臺灣大學_ 碩士班招生考試試題：生物化學(C)#137643

115年 - [無官方正解]115 國立臺灣大學_ 碩士班招生考試試題：生物化學(A)#137641

115年 - [無官方正解]115 國立臺灣大學_ 碩士班招生考試試題：生物化學(一般生物化學)#137622

115年 - 115 國立臺灣大學_ 碩士班招生考試試題：生物化學(B)#137619

114年 - [無官方正解]114 國立清華大學_碩士班考試入學試題_生命科學暨醫學院甲組(生物與醫學科學組)﹕生物化學#132802

114年 - [無官方正解]114學年度學士後獸醫學系招生試題-生物化學#131167

114年 - [無官方正解]114 台灣綜合大學系統_學士班轉學生聯合招生考試：生物化學#129347

114年 - [無官方正解]114 國立臺灣大學_轉學生招生考試試題：生物化學概論#128196

114年 - 114 台灣聯合大學系統_碩士班招生考試試題_化學類：生物化學#126447

114年 - 114 國立成功大學_碩士班招生考試試題：生物化學#126226