The Question is from neet-botany , and it was created by the author K SURESH KUMAR

Question

Acidic amino acids carry two -COOH and one $ - {\rm{N}}{{\rm{H}}_2}$ groups per molecule. Keeping this in mind, select the correct pair of acidic amino acid

K SURESH KUMAR · Accepted Answer

## CORE INFORMATION
✓ **Answer**: B
## CONCEPT FRAMEWORK
	**Primary Concept**: Acidic amino acids have a higher number of carboxyl groups (-COOH) than amino groups (-NH2).
	**Related Topics**: Amino acid classification, functional groups, molecular structure.
	**Prerequisites**: Basic understanding of amino acid structure and functional groups.
## SOLUTION PATHWAY
**Given Information**:
	- Acidic amino acids have two -COOH groups and one -NH2 group.
**Method & Steps**:
	1.	Recall the structures of common amino acids.
		Reasoning: The question requires knowledge of the chemical structures of common amino acids to identify those that have two carboxyl groups (-COOH) and one amino group (-NH2).
	2.	Evaluate each option based on the given criteria.
		Working:  
        - Lysine and arginine are basic amino acids with additional amino groups.
        - Aspartic acid and glutamic acid contain two carboxyl groups (-COOH) and one amino group (-NH2), making them acidic.
        - Glycine and alanine are neutral amino acids with one -COOH and one -NH2.
	3.	Select the option that fits the criteria.
		Result: Option B is the correct answer.
		Verification: Aspartic acid and glutamic acid are known to be acidic amino acids, while the others are not.
 ## OPTION ANALYSIS
[A] :x: Lysine and arginine are basic amino acids, not acidic.
[B] ✓: Aspartic acid and glutamic acid are acidic amino acids, each having two -COOH groups and one -NH2 group.
[C] :x: Glycine and alanine are neutral amino acids, each having one -COOH and one -NH2 group.
[D] :x: Option A is incorrect making option D incorrect.
 ## LEARNING AIDS
	**Common Mistakes**:
		1.[Error 1]: Confusing acidic and basic amino acids. [How to avoid]: Review the structures of common amino acids and their functional groups, specifically the -COOH and -NH2 groups.
		2.[Error 2]: Not understanding that the number of -COOH groups determines acidity. [How to avoid]: Remember the definition of acidic amino acids and their specific structural features.
	**Quick Tips**:
		1.[Helpful shortcut]: Focus on the number of carboxyl (-COOH) groups to determine acidity.
		2.[Memory aid]: Use mnemonics or visual aids to remember the structures of common amino acids.

K SURESH KUMAR · Answer

Lysine and arginine

K SURESH KUMAR · Answer

The correct Option is "Aspartic acid and glutamic acid"

K SURESH KUMAR · Answer

Glycine and alanine

K SURESH KUMAR · Answer

Both (a) and (b)

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