Select the correct answer. essential amino acids cannot be produced by the body, so they must come from our diet. we can get them from eating foods that contain which biomolecule? a. protein b. complex carbohydrate c. fats d. disaccharides

The answer is A. AMINO ACIDS because when you have a chain of amino acids then they go through multiple stages to become proteins. amino acids line up in single polypeptide chains and have a Alpha Helix sheet and a beta pleated sheet. The Alpha Helix sheet and the Beta Pleated sheet are still in tact when the polypeptide folds in on itself. The way these polypeptides stay folded together is by hydrogen and ionic bonds and sometimes the polypeptides might even have covalent bonds. This folding occurs through side chains ( R- Groups) with a combination   of many polypeptide chains. This later forms a single functional protein complex.

hydroxyl -oh

alcohols, always polar, can form hydrogen bonds with h2o molecules

carboxyl -cooh  

cargoxylic acids, has acidic properties which is a source of hydrogen ions, found in cells in ionized for with a charge of oh-1

carbonyl > co

ketone if within skeleton, aldehyde if group is at the end of skeleton, k & a may be structural isomers, it determines 2 sugars (ketose & aldose)

amino -nh2

amines, acts as a base, it can pick up h+ ions from surrounding solution, ionized with charge of 1+

methyl ch2

addition to rna/dna affects and gene expression

phosphate -opo3 ²⁻

organic phosphates, contributes to negative charge to, molecule that it is a part of, and potential to react with h20

sulfhydryl -sh

thiols, cross-linking stabilize the protein, and it is structure

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."