生物化学ⅱ答案（Biochemistry, answer）.docVIP

生物化学ⅱ答案（Biochemistry, answer） Biochemistry II answers (a) Radio questions (scores: 20 points) 1. amino acids containing two carboxyl groups are 3 1. serine 2. tyrosine 3. glutamic acid 4. lysine 5. threonine 2. denatured proteins are characterized by 4 1. viscosity drop 2. increased solubility 3. color reaction is abate 4. lose the original biological activity 5. is not easily hydrolyzed by pepsin 3., the higher the Tm value of the DNA molecule, the base composition of which is 1 1., the higher the content of G+C 2., the higher the content of A+G 3., the higher the content of A+C 4., the higher the content of A+T 5., the higher the content of T+C 4. the major connecting key between the units of nucleic acid is 3 1., two sulfur bond 2. glycosidic linkage 3. phosphate two ester bond 4. peptide bonds 5. hydrogen bonds 5. is usually neither found in DNA nor in RNA. The base is 2 1. adenine 2. xanthine 3. guanine 4. thymine 5. uracil The relationship between base pairs in 6. DNA is 3 1. A=G, C = T 2. A = T, G=C 3. A=T, G = C 4. A-T, G=C 5. A=U, G = C 7. when the substrate concentration reached saturation, the substrate concentration was increased by 3 1., the rate of reaction increases with the increase of substrate 2. the enzyme gradually inactivated as the substrate concentration increased The binding sites of 3. enzymes are all occupied by substrate, and the reaction rate is no longer increased 4., when the inhibitor is added, the reaction speed is accelerated 5. increased formation of enzyme substrate complexes 8. when the rate of reaction of an enzyme is 80% of the maximum velocity, the Km is equal to 5 1. [S] 2. 1/2[S] 3., 0.4, [S] 4. 0.8[S] 5. 1/4[S] 9. the kinetic effect of the anti competitive inhibitor is 4 The 1. Km value increases and the Vmax remains constant The 2. Km value decreases and the Vmax constant 3. Km constant, Vmax rise 4. Km decreases and Vmax decreases 5. Km values remain unchanged and Vmax decreases 10.. The necessary group for enzyme catalysi