焦磷酸酶可以催化焦磷酸水解成磷酸,它的相对分子质量为120000,由6个相同的亚基组成,纯酶的V max 为3600U/mg酶,它的一个酶活力单位(U)规定为:在标准的测定条件下,37℃,15min内水解10μmol焦磷酸所需要的酶量。问:①每毫克酶在每秒钟内水解了多少摩尔底物。②每毫克酶中有多少摩尔的活性中心?(假设每个亚基上有一个活性中心)。③酶的转换数是多少?
【简答题】听音,选词填空。 long little capital wide clever 1. London is the ______ of England. 2. The river is ______ and ______. 3. Xiaoyong is a ______ pupil. 4. This is my _______ sister.
【单选题】IN THE BEDROOM Dont smoke in bed—it causes about 1 000 fires a year, many with fatal results. Dont overload your electrical points; the ideal is 'one appliance, one socket'. Dont use an electric under...
【单选题】● 5 Stress can result from disorganization and a feeling that “there’s so much to do, and not enough time”.Trying to take care of everything at once can be too much for you and as a result, you may no...
A.
Do whatever you like and want to do.
B.
You should make every effort to eat well and get enough rest.
C.
Make a list of things to do.
D.
Try physical activity.
E.
You need a break from your daily routine to just relax and have fun.
F.
You could smile to yourself in front of a mirror every day.
G.
The following are suggestions for ways to deal with stress.