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【单选题】
下图是某同学在显微镜下观察到的金鱼尾鳍内血液流动情况，请判断甲、乙、丙三条血管各属于（ ）A.
动脉、静脉、毛细血管
B.
静脉、动脉、毛细血管
C.
毛细血管、动脉、静脉
D.
静脉、毛细血管、动脉
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
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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.
0.7 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
【简答题】为了测定空心线圈的参数, 在线圈两端加 110V 、 50Hz 的电源,测得 I = 0.5A , P = 40W ,则线圈电阻为 __________ , L = __________ 。
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