bonds

Which statement is incorrect about the beta-beta motif?
a. The 2 strands are antiparalle.
b. The region connecting the beta strands usually contains between 1 to 5 amino acids
c. The region connecting the beta-strands is an example of an a beta-tum.
d. The region connecting the beta strands are more likley contains leucine or phenylalaine than glycine or proline

List the following events in the order in which they occure when a protien such as ribonuclease folds into its native structure.
a.formation of alpha-helices
b. formation of beta-strands
c. formation of supersecondary structures or motifs
d. formation of disulfide bonds