answer both please

What is NOT true about an alpha-helix? the core of the helix is relatively hydrophobic stabilized by extensive bonding interactions between R-groups there is a relatively large hole down the middle of the helix exhibits ubiquitous occurrence of hydrogen bonding the R-groups radiate outward away from each other Question 21 What is the function of disulfide bonds in proteins? contribute to the polarity of proteins make proteins more hydrophobic contribute to protein primary and secondary structure stabilize secondary protein structure form a covalent link between or within protein structure