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【单选题】

5’-肌苷酸二钠为无色至白色结晶,属于添加剂中的(        )

A.
甜味剂
B.
鲜味剂
C.
咸味剂
D.
酸味剂
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参考答案:
参考解析:
.
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【单选题】嘌呤核苷酸从头合成时,最先合成的核苷酸是

A.
腺嘌呤核苷酸
B.
鸟嘌呤核苷酸
C.
次黄嘌呤核苷酸
D.
黄嘌呤核苷酸
E.
7-甲基鸟嘌呤核苷酸

【单选题】Many Americans harbor a grossly distorted and exaggerated view of most of the risks surrounding food.Fergus Clydesdale, head of the department of food science and nutrition at the University of Massac...

A.
They overlook the risks of the food they eat.
B.
They overestimate the hazards of their food.
C.
They are overoptimistic about the safety of their food.
D.
They overstate the government's interference with the food industry.

【单选题】以5'…ACTAGTCAG…3'(DNA链)为模板合成相应mRNA链的核苷酸序列为

A.
5'…TGATCAGTC…3'
B.
5'…UGAUCAGUC…3'
C.
5'…CUGACUAGU…3'
D.
5'…CTGACTAGT…3'
E.
5'…CAGCUGACU…3'

【单选题】参与由糖和氨基酸合成核苷酸的重要辅酶()

A.
次黄嘌呤
B.
胸腺嘧啶核苷
C.
HGPRT
D.
氨甲蝶呤
E.
叶酸

【多选题】下列属于食品添加剂的是()。

A.
防腐剂
B.
酸味剂
C.
漂白剂
D.
凝固剂