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【单选题】
关于蛋白质二级结构叙述错误的是A.
蛋白质某一段肽链局部的有规则的重复构象
B.
仅指主链骨架原子的空间构象
C.
多肽链主链构象由肽单元上Cα原子所连两个单键的自由旋转角度决定。
D.
整条多肽链中全部原子的空间位置
E.
无规卷曲也属二级结构范畴
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Refer to Figure 3. To internalize the externality in this market, the government should
A.
impose a tax on this product
B.
provide a subsidy for this product
C.
forbid production
D.
produce the product itself
【单选题】Refer to Figure 9-3. With trade, China will
A.
import 100 pencil sharpeners.
B.
import 250 pencil sharpeners.
C.
export 150 pencil sharpeners.
D.
export 250 pencil sharpeners.
【单选题】Figure 9-6 Refer to Figure 9-6. Without trade, the equilibrium price of carnations is
A.
$8 and the equilibrium quantity is 300.
B.
$6 and the equilibrium quantity is 200.
C.
$6 and the equilibrium quantity is 400.
D.
$4 and the equilibrium quantity is 500.
【单选题】Figure 9-4. The domestic country is Nicaragua. Refer to Figure 9-4. With trade, Nicaragua
A.
imports 150 calculators.
B.
imports 250 calculators.
C.
exports 100 calculators.
D.
exports 250 calculators.
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