Amino acids are acids because they always possess which functional group? A) ami

Question

Amino acids are acids because they always possess which functional group? A) amino B) carbonyl C) carboxyl D) phosphate E) hydroxyl The two molecules shown in the figure above are best described as A) optical isomers. B) enantiomers. C) structural isomers. D) cis-trans isomers. E) chain length isomers. The figure above shows the structures of glucose and fructose. These two molecules differ in the A) number of carbon, hydrogen, and oxygen atoms. B) types of carbon, hydrogen, and oxygen atoms. C) arrangement of carbon, hydrogen, and oxygen atoms. D) number of oxygen atoms joined to carbon atoms by double covalent bonds.

Explanation / Answer

18. C. Carboxyl

Carboxyl group gives the acidic nature for the amino acids. While the amino group adds basic nature.

19.C. Structural Isomers

Structural Isomers have the same molecular formula but have different connectivities (have different bonding patterns and atomic organization)

20.B.Types of carbon, hydrogen and oxygen atoms

Glucose and fructose have a same number of Carbon, hydrogen and oxygen atoms. While glucose has aldose sugar, fructose is a keto sugar.

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