lowing amino acids contribute atoms utilized in purine biosynthesis? LABORATO A. Asp, Gly, Gin B. Gly, Gin, Phe C. Asp,

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Lowing Amino Acids Contribute Atoms Utilized In Purine Biosynthesis Laborato A Asp Gly Gin B Gly Gin Phe C Asp 1 (35.77 KiB) Viewed 217 times

Lowing Amino Acids Contribute Atoms Utilized In Purine Biosynthesis Laborato A Asp Gly Gin B Gly Gin Phe C Asp 2 (36.39 KiB) Viewed 217 times

lowing amino acids contribute atoms utilized in purine biosynthesis? LABORATO A. Asp, Gly, Gin B. Gly, Gin, Phe C. Asp, Gin, Phe D. Asn, Gly, Phe 2. Which of the following sugars is precursor for purine biosynthesis? A. fructose B. ribulose-5-phosphate C. phosphoribosyl pyrophosphate D. ribose 3. The addition of amine (nitrogen atom) to IMP to form AMP is derived from A. aspartate B. glycine C. glutamine D. arginine 4. Orotate is synthesized from A. glycine and carbamoyl phosphate B. arginine and carbamoyl phosphate C. aspartic acid and carbamoyl phosphate D. aspartic acid and glutamine Use Figure B below to answer Q5 & 6 Figure B 5. The origin of N atom of purine labeled with number 1 is A) glycine B) aspartate C) alanine D) Glutamine 6. The origin of C atom of purine labeled with number 2 is A) ribose B) CO₂ (HCO₂) C) Formate (FH4) D) glycine 7. a common precursor for CMP, UMP, and TMP is A) adenosine B) aspartate C) glutamine D) inosine 8. which of the following is the end product of purine catabolism In human? A) Uric acid B) Allantoin C) Urea D) Xanthine
Final metabolism exam Name: 9. Which of the following pathways is the correct sequence of adenosine catabolism? A) Adenosine->hypoxanthine-xanthine->inosine-uric acid B) Adenosine →→xanthine->inosine-uric acid C) Adenosine->inosine hypoxanthinexanthine→ uric acid D) Adenosine →xanthine-Inosine hypoxanthine →→uric acid 10. Which of the following enzymes is inhibited by allopurinol as an inhibitor for uric acid production? A) PRPP synthase B) Adenosine deaminase C) PRPP amidotransferase D) Xanthine oxidase 11. The most serious consequence of failure of the urea cycle is accumulation of A) urea in the blood. B) aspartic acid in the blood C) ammonia (ammonium ion) in the blood. D) uric acid in the blood. 12. Pyridoxal phosphate acts as coenzyme in most A) transmethylation reactions. B) carbon dioxide fixation reactions. C) transamination reactions. D) kinase reactions. 13. In human the primary organ of urea formation is the A) kidney. B) liver. C) heart. D) bladder. 14. Which of the following amino acid is NOT classified as glucogenic? A) leucine B) isoleucine C) alanine D) histidine 15. Which one of the following is part of the urea cycle? A) Inhibition of urea cycle by N-acetyl glutamate. B) Conversion of carbamoyl phosphate to ammonia C) Conversion of ADP + Pl to ATP. D) Hydrolysis of arginine to form urea. 16. Which of the following amino acids is metabolized to acetoacetate and acetyl-CoA? A) Valine B) Leucine C) Isoleucine D) glycine 17. Which amino acid donates the carbon chain in the biosynthesis of cysteine? A) methionine B) alanine 2