Question:
Which of the following is a neutral amino acid?
Which of the following is a neutral amino acid?
Show Hint
Look for the amino acid whose side chain has no ionizable charged group.
Updated On: Jun 24, 2026
- Aspartate
- Arginine
- Glycine
- Histidine
Show Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Step 1: Amino acids are grouped by the charge on their side chain. A neutral (uncharged) amino acid has a side chain that carries no net charge at physiological pH.
Step 2: Glycine has only a hydrogen atom as its side chain, so it has no ionizable group and is a neutral amino acid. This makes glycine the correct answer.
Step 3: The distractors all carry charged side chains. Aspartate is acidic (negatively charged carboxyl side chain). Arginine and histidine are basic, with positively charged side chains at physiological pH (the imidazole of histidine and the guanidinium of arginine).
Step 2: Glycine has only a hydrogen atom as its side chain, so it has no ionizable group and is a neutral amino acid. This makes glycine the correct answer.
Step 3: The distractors all carry charged side chains. Aspartate is acidic (negatively charged carboxyl side chain). Arginine and histidine are basic, with positively charged side chains at physiological pH (the imidazole of histidine and the guanidinium of arginine).
Was this answer helpful?
0
0
Top NEET PG Biochemistry Questions
- Which of the following clotting factors is needed for gamma-glutamyl carboxylase?
- A patient presented with diarrhea, dermatitis, and dementia. Which of the following vitamin deficiencies would you suspect in this patient?
- A young boy presents to the OPD with hypoglycemia and muscle cramps, on exertion or while playing. Then he becomes normal after resting for a while. These episodes are recurrent after a period of activity. He has decreased serum lactate and glucose levels. Which of the following diseases is he most likely to be suffering from?
- A family consumes only polished rice. Which of the following combinations of vitamin deficiency and enzymatic defect will be present in this family?
- A chronic alcoholic patient presented to the casualty with confusion, ataxia, and painful eye movements. What could be the vitamin deficiency seen in this patient?
View More Questions
Top NEET PG Amino Acids Questions
- An infant is brought by his parents with complaints that his urine turns black on standing. Which of the following metabolic disorders is likely?
- A patient with vitamin B12 deficiency presents with anemia, positive Romberg sign, and elevated homocysteine. Which amino acid is most likely deficient?
- A 5 year old child was brought to the physician with a history of black urine. There is no history of fever or any other complaints. There is no growth retardation and all the developmental milestones are normal. The child is suspected to have an enzyme defect for metabolism of an aromatic amino acid. What is the enzyme deficient?
- Which amino acid needs to be supplemented through diet in a patient with cystathionine beta synthase deficiency?
- Addition of which amino acid will increase the UV absorption of a protein?
Top NEET PG Questions
- A patient hailing from Delhi presents with fever, arthralgia, and extensive petechial rash for 3 days. Lab investigations revealed a hemoglobin of 9 g/ dL, a white blood cell count of 9000 cells/mm3, a platelet count of 20000 cells/mm3, and a prolonged bleeding time. The clotting time was normal. What is the most likely diagnosis?
- Which of the following statements is true about Trichomonas vaginalis?
- A lady from West Rajasthan presented with an ulcer surrounded by erythema on the right leg. Microscopy of the biopsy from the edge of the ulcer showed organisms with dark staining nuclei and kinetoplast. What is the most likely causative agent?
- A child presents with a fever and a rash. Urine examination showed cells with owl's eye appearance. What is the most likely diagnosis?
- Infection with Clonorchis sinensis is associated with an increased risk of__?
View More Questions