有些酶分子表面除了具有活性中心外,还存在着被称为调节位点(或变构位点)的调节物特异结合位点,调节物结合到调节位点上引起酶的构象发生变化,导致酶的活性提高或下降,这种现象称为____。具有上述特点的酶称____酶。
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能催化相同的化学反应,但酶本身的分子结构组成、理化性质、免疫功能和调控特性等方面有所不同的一组酶,称之为____。
维生素是人和动物为维持正常的生理功能而____从食物中获得的一类____有机物质,在人体生长、代谢、发育过程中发挥着重要的作用。
脂溶性维生素在体内可直接参与代谢的调节,而水溶性维生素是通过转变成____对代谢起调节作用。
B.Why did each blogger create their food blog? Choose the reason for each blogger.Anje
A. to make each other laugh
B. to explore recipes from a long time ago
C. to go on adventures without leaving home
D. to help young people learn to respect each other
E. to share a learning experience with people
F. to share information about food in a particular city
G. to teach her daughter and readers about other cultures
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