举一反三
- The most stable conformation for cyclohexane is chair conformation. A: 正确 B: 错误
- Chair<br/>conformation is very much less stable than the boat conformation<br/>about cyclohexane. ( )
- Each protein normally folds into a single stable conformation. This conformation, however, often changes dramastically when the protein interacts with other molecules in the cell.
- The fully folded conformation of a macromolecule is its native conformation.
- The active pharmacodynamic conformation of flexible small molecules is generally A: Conformation in the lattice B: Conformation in a vacuum C: A local low energy conformation D: Solution conformation
内容
- 0
For ethane, staggered conformation is favored over eclipsed conformation
- 1
GTP-binding proteins act as _______________: they are in their active conformation when GTP is bound, but they can hydrolyze this GTP to GDP, which releases a phosphate and flips the protein to an inactive conformation.
- 2
Which of the following has two equatorial alkyl substituents in its most stable conformation? () A: 1,1-dimethylcyclohexane B: cis-1,2-dimethylcyclohexane C: cis-1,3-diethylcyclohexane D: cis-1,4-diethylcyclohexane E: trans-1,3-diethylcyclohexane
- 3
In the boat conformation of cyclohexane, the "flagpole" hydrogens are located on ________. () A: the same carbon B: adjacent carbons C: C-1 and C-3 D: C-1 and C-4 E: none of the above
- 4
With rotation of single carbon bond in ethane, eclipsed or staggered conformation will appear alternatively. Which conformation has higher potential energy? ___________ conformation