資訊推薦

• 45. Acetic acid (CH3COOH) has a pKa of 4.76. What is the molar ratio of potassiumacetate (CH3COOK) t
• 46. Which amino acids are relatively nonpolar (hydrophobic)?(A) Phe, Tyr, Trp (B) Ser, Asn, Gln (C)
• 47. Which amino acids have positive charge at pH 7.0?(A) Phe, Tyr, Trp (B) Ser, Asn, Gln (C) Lys, Ar
• 48. N-linked glycosylation is important process for both the structure and function ofsome eukaryoti
• 49. Which amino acid has a significant effect on the tertiary structure of the protein?(A) Pro (B) T
• 50. The indole group absorbs UV light at 280 nm. It is useful for spectrophotometricmeasurement of p
• 51. Which amino acids carry a negative charge at pH 7.0?(A) Arg, Lys (B) Phe, Try, Trp (C) Glu, Asp
• 52. Which of the following pairs bonds can rotate within a peptide backbone and thetorsion angle of
• 53. Which one is NOT a component of inner mitochondrial membrane?(A) Cytochrome c (B) NADH dehydroge
• 54. During the separation of protein molecules, which method relates to the isoelectricpoint (pI) of
• 55. During the separation of protein molecules, which method is related to proteindenaturation?(A) I
• 56. Which nucleosides below contain both pyrimidines?(A) A, T (B) C, T, U (C) C, G (D) A, G, U
• 57. What force drives the formation of protein tertiary structure?(A) Van der Waals force (B) Electr
• 58. When a polymer of 36-residue forms an α-helix, how many repeats would youexpect it to be?(A) 7 (
• 59. What type of inhibitor X is this Lineweaver–Burk plot shown? (A) Competitive inhibition (B) Unc
• 33. Which of these diaxial conformations has the highest energy? (A) I (B) II (C) III (D) IV
• 60. What type of inhibitor Y is this Lineweaver–Burk plot shown? (A) Competitive inhibition (B) Unco
• 34. Which structure is Z-2-bromo-3-methyl-2-pentene? (A) I (B) II (C) III (D) IV
• 61. Which description is NOT correct?(A) Allosteric interactions in Aspartate transcarbamoylase (ATC
• 62. Which description is NOT correct?(A) Water-soluble proteins fold into compact structures with po
• 63. Which one is NOT a component of ribonucleic acid?(A) Adenine (B) Guanine (C) Thymine (D) Cytosin
• 64. Which step of polymerase chain reaction (PCR) cycle requires the highesttemperature?(A) Denatura
• 65. Which step of polymerase chain reaction (PCR) cycle requires a heat-stable DNApolymerase?(A) Den
• 66. Which of the following immunoglobulin has the largest molecular weight?(A) IgG (B) IgA (C) IgM (
• 67. What kind of immunoglobulin does NOT exist in humans?(A) IgG (B) IgA (C) IgM (D) IgY