1. Which description is   correct  ?
(A) Mannose is a C4 epimer of glucose.
(B) D-glucose and D-glucuronic acid is different on C6.
(C) Dextran is obtained from algae.
(D) Hyaluronan is sulfated hetereopolysaccharide.
(E) α-Keratin is a protein which provides strength in connective tissue.

1297通氣支管與通氣主管之接頭處，應高出最高溢水面多少公分？(A)5公分　(B)8公分　(C)10公分　(D)15公分。

1298通氣管如自樓板下排水橫支管引出(樓板下方之通氣管)，其與管道間通氣立管接續處位置，應在(A)樓板下 (B)最高位置器具之溢水面高度下150mm (C)最高位置器具之溢水面高度150mm以上　(D)高於地板面。

1299管徑65㎜以上者，配至機器設備或油(水)箱(櫃)時，或與使用螺紋街口之閥等連接，或日後須拆卸保養之處，均應使用(A)管套節 (B)彎頭 (C)凸緣 (D)大小頭

1300管徑50㎜以下者，配至機器設備或油(水)箱(櫃)時，或與使用螺紋街口之閥等連接，或日後須拆卸保養之處，均應使用(A)管套節 (B)彎頭 (C)三通 (D)大小頭。

2. Which description is   correct  ? (A) Every turn of α-helix is 3.6 Å in length. (B) Amyloid is homopolysaccharide and composed of glucose linked by the α1→4 linkage. (C) Interconversion between α-D-Glc and β-D-Glc is called mutarotation. (D) Aldohexose has eight stereoisomers. (E) Glc-β1,4-Glc could be drawn as the structure below. CH2OH O | OH | CH2OH O | OH \ O / \ OH OH | OH

3. In the catalytic triad of chymotrypsin protease, _____ increases the basicity of _____thus allowing deprotonation of _____ to serve as a nucleophile. (A) Ser, His, Asp (B) His, Ser, Asp (C) Ser, His, His (D) Asp, His, Ser (E) Cys, His, Ser

4. The catalytic mechanism below is an example of: (A) covalent nucleophilic catalysis. (B) covalent electrophilic catalysis. (C) specific base catalysis. (D) general base catalysis. (E) general acid catalysis.

5. Which statement below about contrasting Hb and Mb is   false  ? (A) Hb shows sigmoidal, whereas Mb shows hyperbolic oxygen saturation curves. (B) Hb shows cooperativity, whereas Mb does not. (C) Hb binds O2 more tightly than Mb. (D) Oxygen binds to a ferrous ion in both proteins. (E) Hb-oxygen binding is dependent on physiological changes in pH, whereas Mb-oxygen binding is not.

6. Which of the following statements regarding enzyme regulation is   true  ? (A) The conversion of trypsinogen to trypsin is an example of zymogen activation. (B) Allosteric effectors are always more powerful than covalent modification. (C) Addition of an inhibitor to a reaction system results in kinetics similar to addition of a competitive inhibitor to a typical hyperbolic system. (D) The T state of an enzyme generally has more activity than the R state. (E) All are true.

7. Which statement regarding glycogen and its metabolism is   correct  ? 　 1. Highly branched glycogen is less soluble than unbranched glycogen. 　 2. Having more ends effectively increases the rate of glycogen synthesis and breakdown. 　 3. To enter glycolysis, glucose-1-phosphate must undergo isomerization to glucose-6-phosphate by phosphoglucomutase. 　 4. To replenish glucose in the bloodstream, glucose-1-phosphate must be hydrolyzed to free glucose by glucose-1-phosphatase. (A) 1, 2, and 3 are correct. (B) 2, 3, and 4 are correct. (C) 1, 2, and 4 are correct. (D) All are correct. (E) None is correct.