Biochemistry - Structure and Properties of Amino Acids - Discussion

Discussion Forum : Structure and Properties of Amino Acids - Section 1 (Q.No. 1)
1.
When the amino acid alanine (R-group is CH3) is added to a solution with a pH of 7.3, alanine becomes
a cation
nonpolar
a zwitterions
an isotope
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
14 comments Page 1 of 2.

Redemtus said:   2 years ago
COOH become deprotonated while NH2 become protonated.

Sheku swaray said:   4 years ago
Thanks all for explaining.

Shawul said:   5 years ago
Thank you for explained briefly.

Kennedy said:   6 years ago
Excellent explanations thanking you all for your help.

ABHIMANYU batra said:   6 years ago
Nice explanation. Thank you all.

Lama shatat said:   7 years ago
Because at physiologic pH ( ~ pH = 7.4), the carboxyl group is dissociated, forming the negatively charged carboxylate ion(-COO-) and the amino group is protonated(-NH3+).

Wangu said:   7 years ago
The amino group gains hydrogen ion that is lost from the carboxyl group.

Kate Wanjiku said:   8 years ago
Because at neutral PH alanine can either act as a base or as an acid.

Wanyama Emmanuel said:   8 years ago
When the amino acid is placed in a solution at physiologic pH, the carboxyl group loses its hydrogen to the amino group, hence it becomes negatively charged while the amino group gets a positively charged.

VISHAL said:   8 years ago
Because they are having both the positive and negative charges.


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