It is now a routine task to determine the exact order in which individual subunits have been linked together in polynucleotides (DNA) and polypeptides (proteins)
However, it remains difficult to determine the arrangement of monomers in a polysaccharide. Explain why this is the case.
Nucleotides and amino acids have an intrinsic directionality, and the mechanism by which monomers are added into a growing polymer is always the same. This yields a linear polymer with the same directionality as the monomers. Polysaccharides are produced by linking monosaccharides together. The monosaccharides can be either added directly or modified to produce various derivatives before addition. Beyond this, there are multiple sites on each monosaccharide where addition can occur, producing highly complex, branched polymers.
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A) reverse transcriptase PCR B) genomics C) chorionic villus sampling D) SDS-PAGE E) protein microarrays
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A) are more easily digested than if eaten separately. B) provide all the nutrients and vitamins your body needs. C) provide all the essential amino acids. D) function in at least two ways, such as serving in structural or protective roles. E) provide a meal that is rich in complete proteins.