
Concept explainers
(a)
Interpretation:
Theglycine amino acid needs to be classified as non-polar or polar. If it is polar then the R group needs to be classified as neutral, acidic or basic. Also, if it is hydrophobic or hydrophilic needs to be identified.
Concept Introduction :
The amino acid consists of two
(b)
Interpretation:
The threonine amino acid needs to be classified as non-polar or polar. If it is polar then the R group needs to be classified as neutral, acidic or basic. Also, if it is hydrophobic or hydrophilic needs to be identified.
Concept Introduction :
The amino acid consists of two functional groups that is amino group as well as carboxylic acid group. There are 20 essential amino acids which are different from each other due to the different R group attached to the carbon containing amino as well as carboxyl groups.
(c)
Interpretation:
The phenylalanine amino acid needs to be classified as non-polar or polar. If it is polar then the R group needs to be classified as neutral, acidic or basic. Also, if it is hydrophobic or hydrophilic needs to be identified.
Concept Introduction :
The amino acid consists of two functional groups that is amino group as well as carboxylic acid group. There are 20 essential amino acids which are different from each other due to the different R group attached to the carbon containing amino as well as carboxyl groups.

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Chapter 18 Solutions
Basic Chemistry
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