資訊推薦

• 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)
• 20. B form DNA has a pitch (height per turn) of ________nm. (A) 0.10 (B) 0.15 (C) 0.34 (D) 0.54 (E)
• 21. The Northern blotting method is normally used for detection of (A) proteins (B) DNA (C) RNA (D)
• 22. Which of the following tautomeric forms is the major form of ribose in solution? (A) α-pyranose
• 23. The ribosome-binding sequence is________ in E. coli? (A) AATT (B) AAGG (C) ATGC (D) TTCC (E) TTG