Bonding interactions in a peptide chain

https://imgur.com/a/9txQ3R0

Could anyone help me understand which forces I should even be identifying here? I know about types of bonding interactions but I've never seen a peptide chain properly before and I don't know what is even happening or what the green line actually is/how the molecules are attached to it

This is for the start of uni and I only have A-Level chem knowledge and not biology :frown:

Dunno if it should still be obvious

Original post by dontknowlol

https://imgur.com/a/9txQ3R0

Could anyone help me understand which forces I should even be identifying here? I know about types of bonding interactions but I've never seen a peptide chain properly before and I don't know what is even happening or what the green line actually is/how the molecules are attached to it

This is for the start of uni and I only have A-Level chem knowledge and not biology :frown:

Dunno if it should still be obvious

Peptides are strings of amino acids joined together by peptide linkages (amide linkages in chemistry).
The whole string bends and twists as interactions between different parts of the string attract, giving the peptide string a characteristic shape.
The four types of interaction (attraction) are:

•

hydrogen bonds

•

London dispersion forces

•

ionic attractions

•

disulfide bridges

The question expects you to identify the attractions in the parts attached to the string.