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7. Zwitterions are: A) amino acids B) ionic molecules that are racemic C) molecu

ID: 566652 • Letter: 7

Question

7. Zwitterions are: A) amino acids B) ionic molecules that are racemic C) molecules that bear both negatively and positively charged groups D) side chain carboxylate anions E) delocalized ions 8. Typically, 'unnatural' amino acids with side chain modifications A) are synthesized due to genetic mutations are assembled by specialized bacterial enzymes are formed by modification of standard side chain residues after the protein synthesis B) C) D) are toxic E) are racemic 9. An amide bond between a -chain carboxylate and an -amino group is also called a(n): A) disulfide bond B) amino amide bond C) nor-peptide bond D) peptide bond E) hormone bond

Explanation / Answer

zwitterions are a molecule that has both negative and positive charge individual atom.so, overall net formal charge is zero. The charged atom must be bound by a covalent bond.

7)

Zwitterions are

(a)amino acids

(C) molecules that bear both negatively and positively charged groups.

(8)

Typically unnatural amino acids with modification:

(c) are formed by modifications of standard side chain residue after the proteins.

(9)

A disulfide bond is a covalent bond between sulfur and sulfur.

when carboxylic molecule reacts with amino acid and forms a covalent bond between carbon and nitrogen that bond called peptide bond.

An amide bond between an alpha- chain carboxylate and alpha-amino group is also called :

D) Peptide bond.

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