24. Which of the following would contribute to tertiary structure?

(A) Charge-charge interaction between lysine and aspartic acid

(B) Disulfide bond

(C) Hydrogen bond between serine hydroxyl group and amide of glutamine

(D) Hydrophobic interaction between leucine and valine

(E) All of the above

1. Which of the following monosaccharides is NOT an aldose? (A) Erythrose (B) Fructose (C) Glucose (D) Glyceraldehyde (E) Ribose

2. Which of the following is NOT a characteristic of carbohydrates in cells? (A) They serve as energy stores in both plants and animals. (B) They are major structural components of plant tissues. (C) They act as binding sites for proteins. (D) They are organic catalysts. (E) They play a role in cell-cell recognition.

3. Which of the following statements about the pentose phosphate pathway is correct? (A) It generates 36 moles of ATP per mole of glucose consumed. (B) It generates 6 moles of CO₂ for each mole of glucose consumed (C) It provides precursors for the synthesis of nucleotides. (D) It is present in plants, but not in animals. (E) It is a reductive pathway; it consumes NADH.

4. Which of the following contributes to the structural rigidity of cellulose? (A) Adjacent glucose polymers are stabilized by hydrogen bonding. (B) Glucose residues are joined by a-1,4 linkages. (C) Cellulose is a highly branched molecule. (D) The conformation of the glucose polymer is a coiled structure. (E) Adjacent glucose polymers are covalently linked by short peptides.

5. Why are sugars usually found as phosphorylated derivatives in cells? (A) Phosphorylated sugars are important in regulating cellular pH. (B) Unphosphorylated sugars can be transported across cell membranes. (C) Unphosphorylated sugars are rapidly degraded by cellular enzymes. (D) Phosphorylated sugars encode genetic information. (E) None of the above is a correct explanation.

6. Coconut oil contains only a very small amount of unsaturated fatty acids. How can it still have a low melting point? (A) (B) It contains a lot of long-chain fatty acids. It contains mostly short-chain fatty acids. (C) It has only a few hydrogen bonds per fatty acid chain. (D) A and C are true. (E) B and C are true.

7. Which of the following statements is true of lipids? (A) Many contain fatty acids in ester or amide linkage. (B) Glycerophospholipids are found only in the membranes of plant cells. (C) Testosterone is an important sphingolipid found in myelin. (D) They are more soluble in water than in chloroform. (E) Most are simply polymers ofisoprene.

8. The polar head group of cholesterol is: (A) the alkyl side chain. (B) glycerol. (C) the hydroxyl group. (D) the steroid nucleus. (E) choline.

9. Which of the following statements is true concerning integral membrane proteins? (A) Hydrophobic interactions anchor them within the membrane. (B) Ionic interactions and hydrogen bonds occur between the protein and the fatty acyl chains ofthe membrane lipids. (C) These proteins can be solubilized by a solution of high ionic strength. (D) Hydropathy plots can be used to determine the amino acid sequence of the protein. (E) All of the above.

10. Cyclic AMP (cAMP) is important to cell function for all the following reasons EXCEPT: (A) it provides information about the extracellular environment. (B) it permits a large intracellular response to relatively weak extracellular signals. (C) it provides a site for integrating the metabolic requirements of cells. (D) it reversibly regulates enzymatic activity in cells. (E) it is a source of energy for cells.

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 - 114 國立高雄大學_研究所碩士班招生考試試題_生命科學：生物化學#137690

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