Which of the following are examples of isomers?
(a) glucose and galactose
(b) alanine and glycine
(c) adenine and guanine
(d) glycogen and cellulose
(a) Glucose and galactose are both six-carbon sugars and thus both have the formula C6H12O6. They are therefore isomers of each other. Adenine and guanine are bases containing different numbers of nitrogen and oxygen atoms. Glycogen and cellulose are different polymers of glucose. Alanine and glycine are amino acids with quite different side chains: a methyl group and a hydrogen atom, respectively.
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A) A B) B C) C D) D
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What will be an ideal response?
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Answer the following statement true (T) or false (F)