SSC
BIOLOGY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
Which statement is true about amino acids?
|
|
All amino acids have
|
|
|
All amino acids have amine groups.
|
|
|
Some amino acids contain phosphorus.
|
|
|
No amino acid contains sulfur.
|
Explanation:
Detailed explanation-1: -Amino acids all have an amine group, a side chain, and a carboxylic acid. This statement is true.
Detailed explanation-2: -The amine group of an amino acid has a relatively high pKa, so at physiological pH (about 7), it will tend to bind a proton, becoming positively charged. Similarly, the acid group has a relatively low pKa, so around pH 7 it will tend to donate its proton to water, becoming negatively charged.
There is 1 question to complete.