The Structure and functions of proteins. This was a timed essay done in 30mins. HUMAN BIOLOGY

Proteins are made up of long chains of amino acids, just a chain of ami. tacids makes up the primary structure. The secondary structure is formed by hydrogen bonds joining the chains in certain places to make an alpha helix or a beta sheet. The tertiary structure is formed by even more folding and joining of the chains to make a globular mass or fibrous mass. An example of this would be a carrier protein. …

…and destructed. Each antibody has a specific binding site for a specific antigen. The nervous system has protein receptor molecules..These are in the neurones. An impulse hits the nerve and travels to the synapse.Molecules odf the neurotransmitter substance are released and diffuse across gaps to fit into the protein receptor molecules, this results in nerve impulse in the second neurone. Enzymes are also proteins and play a massive part in speeding up reactions.