【简答题】计算题: 称取25mg的蛋白酶粉配制成25ml酶液,从中取出0.1ml,以酪蛋白为底物用Folin-酚比色法测定酶活力,结果表明每小时产生1500μg酪氨酸。另取2ml酶液,用凯氏定氮法测得蛋白氮为0.2mg。若以每分钟产生1μg酪氨酸的量为1个活力单位计算,根据以上数据,求:A、1ml酶液中蛋白的含量及活力单位。B.1g酶制剂的总蛋白含量及总活力。C.酶比活力
【判断题】用户思维是指对经营者和消费者的理解,以用户为中心,学会换位思考,发掘用户的真正想法和需求。
【简答题】短文填空。 Long long ago there was an old woman.She made a l 1 by planting f 2 .One daya young man passed by the large beautifulgarden. He was i 3 in these beautifulflowers, and i 4 _ how happy he could be...
【简答题】A dog who chewed off his owner’s infected toe(脚趾)while he was passed-out drunk has been called a lifesaver. Jerry Douthett had been out drinking when his dog Kiko bit off a large part if his big toe. ...
【多选题】以下哪些关于人格权特征的说法是正确的?( )
【简答题】称取25mg的蛋白酶粉配制成25ml酶液,从中取出0.1ml,以酪蛋白 为底物用Folin-酚比色法测定酶活力,结果表明每小时 产生1500μg酪氨酸。另取2ml酶液,用凯氏定氮法测得蛋白氮为0.2mg。若以每分钟产生1μg酪氨酸的量为1个活力单位计算,根据以上数据,求:A、1ml酶液中蛋白的含量及活力单位。 B .1g酶制剂的总蛋白含量及总活力。 C . 酶比活力