Statistics for Amino Acid Questions 2

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	Answer	% Correct
According to Rule 1, peptide bonds have their shape as if the CN link is a .... bond	Double	75%
What shape does a peptide bond have	Flat	75%
In an alpha helix, all of the amino acids can form ..... bonds with each other	Hydrogen	75%
How many residues are there per turn of an alpha helix	3.6	50%
Together, which amino acid residues destabilise an alpha helix due to their negative charge	Aspartic acid glutamic acid	50%
There is ..... rotation about the alpha CN and alpha CC bonds	Free	50%
Which amino acid residue destabilises an alpha helix	Proline	50%
What is the rise per residue in an alpha helix	1.5 angstroms	25%
In a beta turn the carbonyl C of one residue is H bonded to amide proton of a residue ...... residues away	3	25%
What is the rise per residue of a parallel beta pleated sheet	3.25 angstroms	25%
What is the rise per residue of an antiparallel beta pleated sheet	3.47 angstroms	25%
The peptide bond has a ..... moment, i.e. is polar	Dipolar	25%
Which two amino acids are prevalent in beta turns	Glycine proline	25%
The CO and CN groups always form the ...... number of hydrogen bonds	Maximum	25%
Hydrogen bonds are between the CO of one residue and the NH of the ...... residue	n+4	25%
The angle about the alpha CN bond is represented by....	Phi	25%
The angle about the alpha CC bond is represented by.....	Psi	25%
In an alpha helix, the polypeptide twists into a .....	Righthanded screw	25%