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• 5. 請參考右圖中的繼電器回答下列問題,下列敘述何者正確? (A)3V 無法啟動線圈 (B)交流電最高2A (C)這是單刀雙閘繼電器 (D)一次只能控制一組電路。
• 2. All of the amino acids that are found in proteins, except for proline, contain a(n): (A) amino
• 3. The uncommon amino acid selenocysteine has an R group with the structure -CH2-SeH (pKa ≈ 5). In a
• 4. The first step in two-dimensional gel electrophoresis generates a series of protein bands by isoe
• 5. Which of the following describes the overall three-dimensional folding of a polypeptide? (A) P
• 6. In an aqueous solution, protein conformation is determined by two major factors. One is the forma
• 7. In the α helix the hydrogen bonds: (A) are roughly parallel to the axis of the helix. (B)are r
• 8. The major reason that antiparallel β-stranded protein structures are more stable than parallel β-
• 9. In the binding of oxygen to myoglobin, the relationship between the concentration of oxygen and t
• 10. In hemoglobin, the transition from T state to R state (low to high affinity) is triggered by:
• 11. The fundamental cause of sickle-cell disease is a change in the structure of: (A) blood. (B)c
• 12. The predominant structural feature in myosin molecules is: (A) a β structure. (B)an α helix.
• 13. One of the enzymes involved in glycolysis, aldolase, requires Zn2+ for catalysis. Under conditio
• 14. Which one of the following statements is true of enzyme catalysts? (A) Their catalytic activi
• 15. Which of the following statements about a plot of V0vs. [S] for an enzyme that follows Michaelis
• 16. Which of the following monosaccharides is not an aldose? (A) erythrose (B)fructose (C) gluc
• 17. When two carbohydrates are epimers: (A) one is a pyranose, the other a furanose. (B)one is an
• 18. Which of the following is not a reducing sugar? (A) Fructose (B)Glucose (C) Glyceraldehyde
• 19. The biological role of restriction enzymes is to: (A) aid recombinant DNA research. (B)degrad
• 20. The PCR reaction mixture does not include: (A) all four deoxynucleoside triphosphates. (B)DNA
• 21. Which one of the following analytical techniques does not help illuminate a gene's cellular
• 22. Hydrolysis of 1 M glucose 6-phosphate catalyzed by glucose 6-phosphatase is 99% complete at equi
• 23. The structure of NAD+ does not include: (A) a flavin nucleotide. (B)a pyrophosphate bond. (
• 24. The anaerobic conversion of 1 mol of glucose to 2 mol of lactate by fermentation is accompanied
• 25. The conversion of 1 mol of fructose 1,6-bisphosphate to 2 mol of pyruvate by the glycolytic path