Amino Acid Metabolism and Nitrogen Handling
- Previous year questions on Amino Acid Metabolism and Nitrogen Handling for NEET PG (National Eligibility cum Entrance Test - Postgraduate), from the Biochemistry section of the exam.
- Most questions here come from previous-year papers of Indian postgraduate medical entrance and licensing exams; where a paper and year are recorded the question carries them. The image-based questions are original vignettes written around an openly licensed figure, and were never asked in any exam.
- 192 live questions in Amino Acid Metabolism and Nitrogen Handling.
- 8 of 192 questions carry a verified exam year: 2018, 2019, 2020.
- Biochemistry is worth about 16 of 300 questions on the exam. See every subject’s weightage.
- Question set last updated 6 Sept 2026.
Q1.Nitric oxide is synthesized from which amino acid:
- AArginine✓ Correct answer
- BSerine
- CThreonine
- DLysine
Q2.Glycine present in all except:
- AGlutathione
- BCreatine
- CGlutamine✓ Correct answer
- DPurine nucleotide
Q3.Glycine is required in formation of all except -
- AHeme
- BPurines
- CGlutathione
- DThyroxine✓ Correct answer
Q4.With help of the drug shown below, serotonin is synthesized from which of the following precursor amino acid?
- ATryptophan✓ Correct answer
- BGlycine
- CThreonine
- DMethionine
Q5.NO is synthesized from:
- AL-arginine✓ Correct answer
- BL-citrulline
- CGlycine
- DLysine
Q6.Amino Acid having role in sleep wake cycle:
- ATryptophan✓ Correct answer
- BPhenylalanine
- CGlycine
- DGlutamine
Q7.Because free ammonia in the blood is toxic to the body, it is transported in which of the following non-toxic forms?
- AHistidine and urea
- BPhenylalanine and methionine
- CGlutamine and urea✓ Correct answer
- DLysine and glutamine
Q8.Atherosclerosis is associated with:
- ALysine
- BHistidine
- CHomocysteine✓ Correct answer
- DLeucine
Q9.Creatinine is formed from :
- AArginine✓ Correct answer
- BLysine
- CLeucine
- DHistamine
Q10.Xanthurenate is a product/intermediate metabolite of
- APhenylalanine
- BLeucine
- CTryptophan✓ Correct answer
- DIsoleucine
Answer key
Q1: A. Arginine; Q2: C. Glutamine; Q3: D. Thyroxine; Q4: A. Tryptophan; Q5: A. L-arginine; Q6: A. Tryptophan; Q7: C. Glutamine and urea; Q8: C. Homocysteine; Q9: A. Arginine; Q10: C. Tryptophan.
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