(3)海鮮放在碎冰上

(2)罐頭

(3)海苔

(1)冷凍

(2)乾燥處理

(4)真空或密封包裝

1. Protein secondary structures are defined by which of the following interactions? (A) Van der Waals interactions (B) Columbic interactions (C) Hydrophobic interactions (D) Hydrogen bonding (E) None of the above

2. What kind of post-translational modification(s) can take place in a serine residue of a protein? (A) Glycosylation (B) Nitrosylation (C) Lipidation (D) Ubiquitination (E) All the above

3. HELQ enzyme requires for catalysis. When the enzyme lacks  , it would be referred to as the: (A) apoenzyme. (B) substrate. (C) coenzyme. (D) holoenzyme. (E) prosthetic group.

4.The double helix of DNA in the B-form is stabilized by: (A) covalent bonds between the 3' end of one strand and the 5' end of the other. (B) hydrogen bonding between the phosphate groups of two side-by-side strands. (C) hydrogen bonds between the riboses of each strand. (D) nonspecific base-stacking interaction between two adjacent bases in the same strand. (E) ribose interactions with the planar base pairs.

5. Most transduction systems for hormones and sensory stimuli that involve trimeric G proteins have in common all of the following except: (A) cyclic nucleotides. (B) nuclear receptors. (C) receptors that interact with a G protein. (D) receptors with multiple transmembrane segments. (E) self-inactivation.