資訊推薦

• 32. All are true for low-barrier hydrogen bonds EXCEPT: (A) The hydrogen is centered between the two
• 33. The mechanism of chymotrypsin involves which of the following elements? (A) deprotonation of an
• 34. HIV-1 protease is different from most mammalian aspartic acid proteases in that it has: (A) two
• 35. All are true for cAMP-dependent protein kinase EXCEPT: (A) also known as PKA. (B) phosphorylase
• 36. The T form (tense or taut form) of deoxyhemoglobin differs from oxyhemoglobin (the R form or rel
• 37. What is the relationship between photoautotrophs and heterotrophic cells? (A) Photoautotrophs us
• 38._____________ , a pathway that synthesizes glucose from non-carbohydrate precursors, uses seven o
• 39. Fructose in the diet or fructose from sucrose in the diet can be a source of calories for fat sy
• 40. Galactosemic individuals can be treated by___________ adults due to metabolism of galactose-1-ph
• 41. Isocitrate dehydrogenase has all of the characteristics EXCEPT: (A) ADP raises the Km for isocit
• 42. All are characteristics of succinyl-CoA synthetase EXCEPT: (A)succinyl-CoA can be used to drive
• 43. Does electron transport stop if rotenone is added? Why? (A) Yes, there is not an electron source
• 44. All are properties of glycerol-3-phosphate dehydrogenases EXCEPT: (A) one is located in the cyto
• 45. Which of the following statements about the light reactions of photosynthesis is true? (A) Ther
• 46. When light energy is absorbed by chlorophyll an electron is promoted to a higher orbital and the
• 47. In the gluconeogenic pathway, the three regulated reactions of glycolysis c and are replaced by_
• 48. Which of the following is absolutely essential for the activation of pyruvate carboxylase? (A) h
• 49. What are the three most common ketone bodies? (A) acetone, butyrate and acetyl-CoA (B) acetoacet
• 50. Ketone bodies are transported to the tissues of utilization: (A) complexed to serum albumin. (B)
• 15. 在 30 天內發生 50%死亡的致死劑量，以下列何者表示？ (A) TD30\/50 (B) LD30\/50 (C) TD50\/30 (D) LD50\/30
• 25.有關共基極放大器的特點之敘述，下列何者正確？ (A)輸入電阻小，輸出電阻大，輸出電壓與輸入電壓同相 (B)輸入電阻小，輸出電阻大，輸出電壓與輸入電壓反相 (C)輸入電阻大，輸出電阻小，輸出電壓與
• 26.某三級串級放大器，每個單級放大器低頻截止頻率都是1kHz，高頻截止頻率都是100kHz。則總頻寬約為何？ (A)99kHz (B)63kHz (C)49kHz (D)35kHz
• 2. 下列關於輻射誘發產生白內障的敘述何者正確？A.輻射誘發產生白內障為機率效應(stochastic effect)B. ICRP 118 報告建議將白內障的閾值劑量(threshold dose)
• 3. 有一樣品連同背景一起被計數 5 分鐘，其計數為 10,000 counts，在沒有樣品的情況下計 數背景 5 分鐘，其計數為 400 counts，請問此樣品的計數率和其標準差為多少 cpm？
• 4. 用於偵測人體組織劑量之輻射劑量計常使用下列何種熱發光材料？ (A) CaF2 (B) CaSO4 (C) LiF (D) NaI