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【单选题】
污泥调理的目的是( )。A.
改善污泥浓缩和脱水的性能，提高机械脱水设备的处理能力
B.
去除污泥中的间隙水，缩小污泥的体积
C.
去除微生物使污泥中的有机物稳定化
D.
去除污泥颗粒内的毛细管结合水
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【单选题】An enzyme catalyzes the reaction A ⇌ B. The k cat is 600 sˉ 1 . When the enzyme concentration is 20 nM and the substrate concentration is 40 μM, the V 0 is 9.6 μM s -1 . What is the K m ?
A.
2.5 μM
B.
5 μM
C.
10 μM
D.
20 μM
【单选题】An enzyme catalyzes the reaction A ⇌ B. The enzyme is present at a concentration of 2 nM, and the V max is 1.2 μM s - 1 . The K m for substrate A is 10 μM. Calculate the initial velocity of the reacti...
A.
0.1 m M s - 1
B.
0.2 m M s - 1
C.
0.3 m M s - 1
D.
0.4 m M s - 1
【单选题】An enzyme catalyzes the reaction A ⇌ B. The enzyme is present at a concentration of 2 nM, and the V max is 1.2 μM s - 1 . The K m for substrate A is 10 μM. Calculate the initial velocity of the reacti...
A.
0.7 m M s - 1
B.
0.8 m M s - 1
C.
0.9 m M s - 1
D.
1.0 m M s - 1
【单选题】An enzyme catalyzes the reaction A ⇌ B. The enzyme is present at a concentration of 2 nM, and the V max is 1.2 μM s -1 . The K m for substrate A is 10 μM. Calculate the initial velocity of the reactio...
A.
0.7 μM s -1
B.
0.8 μ M s -1
C.
0.9 μ M s -1
D.
0.95 μ M s -1
【单选题】An enzyme catalyzes the reaction A ⇌ B. The enzyme is present at a concentration of 2 nM, and the V max is 1.2 μM s -1 . The K m for substrate A is 10 μM. Calculate the initial velocity of the reactio...
A.
0.4 μM s -1
B.
0.5 μ M s -1
C.
0.6 μ M s -1
D.
0.7 μ M s -1
【单选题】An enzyme catalyzes the reaction A ⇌ B. The enzyme is present at a concentration of 2 nM, and the V max is 1.2 μM s - 1 . The K m for substrate A is 10 μM. Calculate the initial velocity of the reacti...
A.
0.7 m M s - 1
B.
0.8 m M s - 1
C.
0.9 m M s - 1
D.
1.0 m M s - 1
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