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【单选题】
下列有机物属于烷烃的是（ ）A.
C 2 H 6 O
B.
C 2 H 2
C.
C 4 H 10
D.
C 6 H 6
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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
【判断题】For MPSK， the correct statement isa. The larger the value of M, the higher the BER performance.b. The larger the value of M, the higher the spectrum efficiency.c. A symbol of MPSK corresponds to M bit...
A.
正确
B.
错误
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