18. Which of the following vitamins are cofactors required for the enzymatic reactions involved in the conversion of homocysteine to methionine?
(A) Biotin and pantothenic acid
(B) Vitamin B12 and folic acid
(C) Vitamin B1 and Vitamin B2
(D) Vitamin D and vitamin K

1. Which one of the followings is the major lipid of cell membrane? (A) Cholesterol; (B) Phospholipids; (C) Terpene; (D) Eicosanoids

2. Which one of the following descriptions about Oleic acid is   incorrect  ? (A) Oleic acid has 18 carbon atoms (B) Oleic acid is a monounsaturated fatty acid (C) Oleic acid has only one carbon-carbon double bond (D) The position of carbon-carbon double bond of oleic acid is between C8 and C9

3. The transport of H2O is dependent on which protein? (A) Aquaporin; (B) SERCA; (C) Flippase; (D) Caveolin

4. Which mechanism is related to the glucose transport by GLUT4? (A) Simple diffusion; (B) Facilitated diffusion; (C) Primary transport; (D) Secondary transport

5. Which one of the followings is related to the production of diacylglycerol (DAG) from the membrane lipids? (A) Phospholipase C; (B) Phospholipase A; (C) Phospholipase D; (D) Phospholipase B

6. There are four levels in protein structure: primary, secondary, tertiary, and quaternary. The α-helix is in what level of protein structure? (A) Primary; (B) Secondary; (C) Tertiary; (D) Quaternary

7. The polyampholyte is an important character of a protein. What solution factor has the greatest effect on this protein property? (A) The temperature; (B) The solubility; (C) The ionic strength; (D) The acid-basic condition

8. Regarding to the structure of amino acids, which following description is incorrect? (A) Methionine has a sulfur-containing side chain (B) Phenylalanine is an aromatic amino acid (C) Serine is an aliphatic amino acid (D) Histidine is a basic amino acid

9. The globular protein folding is a thermodynamical process in physiological condition. Which following force of chemical binding interaction does not involve? (A) Van der Walls interactions; (B) Electrostatic interactions; (C) Hydrogen bonds; (D) Polypeptide bonds

複選題10. Regarding to biosynthesis of a protein in eukaryotes, which following description is correct? (A) The molecule of tRNA functions as a template of genetic information, and the rRNA serves as an anti-codon to synthesize specific amino acid (B) Protein synthesis occurs in the ribosome, via a specific aminoacyl-tRNA synthetase (C) The polypeptide synthesis requires an AUG as a start codon, while no specific termination codon is required. (D) The polypeptide chains undergo post-translational modification in endoplasmic reticulum

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