Proteins are described as polymers because they are
Correct answer: A. large molecules built from repeating amino acid units
- A. large molecules built from repeating amino acid units
- B. made of two identical halves
- C. always branched
- D. insoluble in all solvents
Explanation
A polymer is any large molecule assembled from many small repeating units, and in a protein those units are amino acids joined by peptide bonds. Unlike a synthetic polymer, the sequence is precisely specified rather than random, which is what allows a protein to have a defined function. Polysaccharides and nucleic acids are the other biological polymers.
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About Classification of Proteins
Proteins are classified by composition as simple, conjugated and derived proteins, and by shape as fibrous or globular proteins. The topic relates these classes to examples such as albumin, keratin, collagen, haemoglobin and casein, while distinguishing structural proteins from proteins with transport, catalytic or regulatory roles.
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