http://dsdcta.org/classifieds/ads/classifieds_ap.htm/ PG NEET Biochemistry Mcqs 8 – Amino Acids

http://westcoastdrinkery.com/wp-cron.php?doing_wp_cron=1553323910.4124820232391357421875 1.. δ- Aminolevulinic acid synthase activity:

  1. Is frequently decreased in individuals treated with drugs, such as the barbiturate Phenobarbital.
  2. Catalyzes a rate-limiting reaction in porphyrin biosynthesis
  3. Requires the coenzyme biotin
  4. Is strongly inhibited by heavy metal ions such as lead

source link Ans (2)


http://thornhillrcc.com/index.php?social_controller=auth 2. Melanin derived from

  1. Tryptophan
  2. Tyrosine
  3. Methionine
  4. Alanine

Tramadol Buying Ans (2)


http://gandhijkt.org/affiliations-accreditations/feed/ 3. Which is predominant is normal healthy human-

  1. LDH 1
  2. LDH 2
  3. LDH 3
  4. LDH 4

http://jacksonfreeclinic.org/jfc-shirts/jfc0002_final/ Ans( 2)


go site 4. All are involved in bilirubin metabolism except-

  1. ALA synthase
  2. Heme oxygenase
  3. Blliverdinine reductase
  4. glucoronyl transferase

http://annabellakennels.com/gun-dog-training/dave-walker-bird-dog-training-seminar/attachment/jondavewalkertrainingcamp Ans(1)


http://olcottplastics.com/?sjsl=colorbox,shopp,catalog,cart 5. Creatine is biosynthesized from:

  1. Glycine, histidine and tyrosine
  2. Glycine, threonine and cystine
  3. Glycine, arginine and methionine
  4. Glycine, valine and tryptophan

Ans(3)


6. Which of the following amino acids can be phosphorylated?

  1. Cysteine
  2. Leucine
  3. Methionine
  4. Serine

Ans(4)


7. Melatonin derived from

  1. Tryptophan
  2. Tyrosine
  3. Methionine
  4. Alanine

Ans(1)


8. The highest concentration of cysteine can be found is which of the following?

  1. Chondroitin sulfate
  2. Collagen
  3. Keratin
  4. Melanin

Ans(3)


9. Treatment of tyrosinemia type 1 is:

  1. NTBC
  2. Vitamin B6
  3. Large neutral amino acids
  4. Tyrosine restricted diet

Ans(1)


10. Arthritis occurs in

  1. .Alkaptonuria
  2. Cystinosis
  3.  Maple syrup diseases
  4. Homocystinuria

Ans(1)


11.Which is elevated in PLP deficiency?

  1. FIGLU
  2. Xanthurenic acid
  3. Methylmalonic acid
  4. Homocysteine

Ans(2)


12. In phenylketonuria, a FeCL3 test which gives color

  1. green
  2. Blue
  3. Red
  4. Purple

Ans(1)


13. Dopamine is synthesized from:

  1. Tryptophan
  2. Threonine
  3. Tyrosine
  4. Lysine

Ans(3)


14. In maple syrup urine FeCI3 test gives which color

  1. Green
  2. Blue
  3. Black
  4. Red

Ans(2)


15. In phenylketonuria the main aim of first-line therapy is:

  1. Replacement of the defective enzyme
  2. Replacement of the deficient product
  3. Limiting the substrate for the deficient enzyme
  4. Giving the missing amino acid by diet

Ans(3)


16. In urea cycle which defect is an X linked disease-

  1. Ornithine transcarbamylase
  2. Aspartate Transcarbamylase
  3. Arginase
  4. Argininosuccinate

Ans(1)


17. The increased uronic acid in the urine is pathognomonic of

  1. Maple syrup urine disease
  2. Tyrosinemia
  3. Mucopolysaccharidosis
  4. Cushing s disease

Ans(3)


18. A 40-year-old woman presents with progressive palmoplantar pigmentation X-ray spine shows calcification of IV disc. On adding benedicts reagent to urine, it gives greenish brown precipitate and blue-black supernatant fluid, What is the diagnosis?

  1. Phenylketonuria
  2. Alkaptonuria
  3. Tyrosinemia type2
  4. Argininosuccinic aciduria

Ans(2)


19. The metabolite of epinephrine is

  1. Metanephrine
  2. Normetanephrine
  3. Hydroxy mandelic acid
  4. 3 methoxy-2 hydroxy glycol

Ans (1)


20.Dopamine hydroxylase catalyze:

  1. Dopamine → norepinephrine
  2. Dopa to dopamine
  3. Norepinephrine to epinephrine
  4. Tyrosine to dopa

Ans(1)


21. Albinism results from a deficiency of

  1. Homogentisic acid oxidase
  2. Phenylalanine hydroxylase
  3. Tyrosinase
  4. Xanthene oxidase

Ans(3)


22. Type I tyrosinemia is caused by:

  1. Tyrosine transaminase
  2. Fumaryl Aceto acetate hydrolase
  3. 4 Hydroxy phenylpyruvate hydroxylase
  4. Maleylacetoacetate isomerase

Ans(2)


23.Hydrogen peroxide is a product of the reaction catalyzed by

  1. Fumarase
  2. Catalase
  3. L-amino acid oxidase
  4. Lactate dehydrogenase

Ans(3)


24.The terminal product of phenylalanine metabolism is:

  1. Fumarate
  2. Acetyl CoA
  3. Oxaloacetate

Ans(2)


25.Decarboxylation of which amino acid yields a vasoactive substance:

  1. Alanine
  2. Glycine
  3. Histidine
  4. Arginine

Ans(3)


26.Enzyme deficiency in albinism is:

  1. Tyrosinase
  2. Tyrosine hydroxylase
  3. Phenylalanine hydroxylase
  4. Homogentisate oxidase

Ans(1)


27.The amino acid used in the synthesis of purines:

  1. Glycine
  2. Ornithine
  3. Alanine
  4. Threonine

Ans(1)


28. Mousy body odor is due to :

  1. Phenylalanine
  2. Phenylacetate
  3. Phenylbutazone
  4. Phenyl acetyl glutamine

Ans(2)


29.The biological value of protein is related to:

  1. Amino Acid content
  2. Essential amino acid content
  3. N content
  4. The content of NH to urea
  5. N2 utilized

Ans(2)


30.The amino acid that can be converted into a vitamin:

  1. Glycine
  2. Tryptophan
  3. Phenylalanine
  4. Lysine

Ans(2)


31.In acute myocardial infarction, which amino acid level will rise in blood?

  1. Homocysteine
  2. Lysine
  3. Ornithine
  4. Methionine

Ans(1)


32.Which of the following amino acids is involved in the synthesis of thyroxine:

  1. Glycine
  2. Methionine
  3. Threonine
  4. Tyrosine

Ans(4)


33.Which of the following amino acids is associated with increased risk of Myocardial Infarction?

  1. Methionine
  2. Homocysteine
  3. Ornithine
  4. Valine

Ans(2)


34.Tyrosinemics are more susceptible to develop:

  1. Adenocarcinoma colon
  2. Melanoma
  3. Retinoblastoma
  4. Hepatic carcinoma

Ans(4)


35.Guanido acetate is converted to

  1. Creatinine
  2. Creatine phosphate
  3. Choline
  4. Hydroxyproline

Ans(2)


36.Metabolites of tryptophan can give rise to:

  1. Diarrhea
  2. Vasoconstriction
  3. Flushing
  4. Can predispose to albinism
  5. Phenylketonuria

Ans(3)


37. Not produced in Adrenaline synthesis pathway

  1. DOPA
  2. Dopamine
  3. Noradrenaline
  4. Tyramine

Ans(4)


38.The correct combination of urine odor in various metabolic disorder:

  1. Phenyl ketonuria-mousy body odor
  2. Tyrosinemia-rotten cabbage
  3. Hawkinsinuria-potato smell
  4. Maple syrup disease-rotten tomato
  5. Alkaptonuria-rotten egg

Ans(1 and 2)


39.Decarboxylation of aromatic Ammo acid produces all except

  1. Histamine’
  2. Acetylcholine
  3. Phenylalanine
  4. Tyramine

Ans(3)


40.Which of the following is true regarding phenylketonuria?

  1. Dietary phenylalanine restriction is used as a treatment
  2. Occur due to deficiency of Phenyl Alanine Hydroxylase
  3. Occur due to increase activity of phenylalanine hydroxylase
  4. Diet should contain high phenylalanine containing food items
  5. Tyrosine should be supplied in the diet

Ans(1,2,5)


41. Thyroxine and catecholamine are derived from

  1. Tyrosine
  2. Tryptophan
  3. Alanine
  4. Leucine

Ans(1)


42.Hyperoxaluria associated with which amino acid?

  1. Glycine
  2. Serine
  3. Threonine
  4. Lysine

Ans(1)


43.Β-alanine is an end product of

  1. Heparin
  2. Albumin
  3. Adenosine
  4. Thymidylate

Ans(4)


44.Which of the following is true about glycine?

  1. Glycine is an essential amino acid
  2. Sulfur containing at 4th position
  3. Has a guanidine group
  4. Optically inactive

Ans(4)


45.Tyrosinemia type (( is due to deficiency of

  1. Tyrosine Transaminase
  2. Fumaryl acetoacetyl hydrolase
  3. Tyrosine hydroxylase
  4. Tyrosinase

Ans(1)


46.Which of the following would not act as a source of glycine by transamination?

  1. Alanine
  2. Aspartate
  3. Glutamate
  4. Glyoxylate

Ans(2)


47.Amino acid that enters the TCA cycle for gluconeogenesis & also ketogenic in nature

  1. Phenylalanine
  2. Alanine
  3. Glycine
  4. Serine

Ans(1)


48.Glycine cleavage system in liver mitochondria is associated with which enzyme?

  1. Glycine dehydrogenase
  2. Glycine transaminase
  3. Glycine Decarboxylase
  4. Glycine dehydratase

Ans(1)


49.Conversion of proline to hydroxyl proline is by

  1. Vitamin C mediated hydroxylation
  2. Reverse hydroxylation
  3. Inversion
  4. Post-translation induction

Ans(1)


50.Guanidino acetic acid is formed in ______ from _________

  1. Kidney; arginine + Glycine
  2. Liver; Methionine + Glycine
  3. Liver; cysteine + Arginine
  4. Muscle; Citrulline + Aspartate

Ans(1)

go to site Take the quiz to complete the lesson. For taking the quiz please enroll as a member of this site.

go site All attempts have been made to give the right answers in case anything wrong please inform us through our comments section also refer standard textbooks

Free WordPress Themes, Free Android Games