【判断题】DNA has a triple helix that stores genetic information.
【单选题】During fibrillogenesis of type I collagen, the triple helix of the procollagen molecule is formed at which of the following locations?
D.
Rough endoplasmic reticulum
【单选题】(2分)概率密度曲线和直方图曲线的主要区别是 ?
A.
直方图曲线的计算方法与概率密度曲线的计算方法不相同;
B.
直方图曲线的形状与概率密度曲线的形状不相同;
D.
概率密度曲线的积分为1,直方图曲线的积分部位1;
【单选题】概率密度曲线和直方图曲线的主要区别是 ?
A.
概率密度曲线的积分为1,直方图曲线的积分部位1;
C.
直方图曲线的形状与概率密度曲线的形状不相同;
D.
直方图曲线的计算方法与概率密度曲线的计算方法不相同;
【单选题】In the a helix, the hydrogen bonds:
A.
are roughly parallel to the axis of the helix.
B.
are roughly perpendicular to the axis of the helix.
C.
occur mainly between electronegative atoms of the R groups.
D.
occur only between some of the amino acids of the helix.
E.
occur only near the amino and carboxyl termini of the helix.
【简答题】螺旋-转角-螺旋基序(helix-turn-helix motif)
【单选题】Collagen provides great tensile strength to connective tissue by its structure as a triple helix. Which amino acid is critical in allowing triple-helix formation?
【简答题】α螺旋-转角-α螺旋基序模体(helix-turn-helix motif)
【简答题】螺旋-环-螺旋(helix-loop-helix)