資訊推薦

• 34.一逆流式操作的填充塔要用於空氣提取氨水中的氨，已知氨水的入口流率為10kmol\/h，空氣的入口流率為9.8kmol\/h，入口的空氣不含氨，入口的氨水中氨的莫耳分率為0.1。假設空氣與水不
• 35.瀝取的過程中不包含以下哪一種現象？ (A)毛細現象 (B)溶解現象 (C)擴散現象 (D)蒸發現象
• 36.密閉容器內的空氣具有絕對濕度0.06(kg水\/kg乾空氣)，經過下列哪一種程序後，濕度可以提升？ (A)定壓下降溫 (B)定壓下升溫 (C)絕熱下降溫 (D)絕熱下升溫
• 37.乾燥裝置中可以採用多種技術，下列哪一種不包含在內？ (A)抽真空 (B)加入萃取劑 (C)降溫至冷凍 (D)照射紅外線
• 38.下列關於固體的性質及其輸送，何者正確？ (A)篩析法的分離原理是選擇篩網的孔徑，區分不同尺寸的顆粒是否通過 (B)沉降法的分離原理是固定顆粒的終端速度，用沉降時間長短分開不同尺寸的顆粒 (C)使
• 39.下列何者不屬於固-固分離裝置？ (A)壓濾機 (B)磁分機 (C)乾式類析器 (D)篩選機
• 40.關於觸媒反應器，下列敘述何者正確？ (A)觸媒多為液相 (B)觸媒必須固定在反應器內 (C)觸媒可以不斷重複使用 (D)反應物多為氣相
• 2. αhelix of a polypeptide has a pitch (height per turn) of ______m. (A) 0.10 (B) 0.15 (C) 0.34 (D)
• 3. Which of the following descriptions about Hb (hemoglobin) is incorrect? (A) One Hb can bind 4 O2
• 4.Which of the following descriptions about the Michaelis-Menten rate equation is incorrect? (A) KM
• 5.______is commonly used to stain proteins after SDS-PAGE. (A) DAPI (B) EtBr (C) Coomassie Brilliant
• 6. A protein consists of 1,000 amino acid residues. What is its approximate molecular weight? (A) 33
• 7. Absorbance at______ nm is frequently used to determine the concentration of a protein. (A) 200 (B
• 8. Which of the following compounds has the highest molecular weight? (A) adenine (B) adenosine (C)
• 9. Which of the following descriptions regarding disaccharide is incorrect? (A) Sucrose is α-D-gluco
• 10. Which of the following restriction endonucleases is an isoschizomer of Xbal (TCTAGA)? (A) EcoRI
• 11. Which scientist made a significant contribution to the understanding of the structure of collage
• 12. Triton X-100 is a nonionic surfactant that denatures proteins by disrupting_________ ? (A) hydro
• 13. How many stereoisomers for a pentose? (A) 2 (B) 4 (C) 6 (D) 8 (E) 16.
• 14. A(n)_______bond links ribose to adenine in AMP. (A) ether (B) ester (C) amide (D) aldehyde (E) p
• 15. Which of the following lipids is not a major component of cellular membranes? (A) glycerophospho
• 16. TyC loops are found in (A) mRNA (B) rRNA (C) tRNA (D) miRNA (E) snRNA.
• 17. Which of the following bond-pairs within a peptide backbone show free rotation around both bonds
• 18. Which scientist made a significant contribution to the technology of PCR? (A) K. B. Mullis (B) J
• 19. Which of the following amino acids contains only one codon? (A) Ala (B) Lys (C) Tyr (D) Met (E)