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Biochemistry Mcqs

Which of the following is correct about breakdown of hemoglobin (Hb)_____________?

  • (A)  Hb→Heme→bilirubin→Urobilinogen
  • (B)  Heme→Hb→Biliverdin→Urobilinogen
  • (C)  Hb→Heme→Bilverdin→Uro bilinogen
  • (D)  Hb→Heme→bilirubin→Urobilinogen→Biliverdin
Submitted By :Ali Uppal


Heme in haemoglobin is____________?

  • (A)  Between Helix C and D
  • (B)  Surrounded by non polar environment
  • (C)  Bonded to E7 histidine
  • (D)  Protoporophyrin IX
Submitted By :Ali Uppal


Cytochromes are_____________?

  • (A)  Pyridine nucleotides
  • (B)  Riboflavin containing nucleotides
  • (C)  Metal containing flavoproteins
  • (D)  Iron-porphyrin proteins
Submitted By :Ali Uppal


Which of the following is a precursor of protoporphyrin_______________?

  • (A)  Alanine
  • (B)  Leucine
  • (C)  Histidine
  • (D)  Glycine
Submitted By :Ali Uppal


Proteins are absorbed from GIT as_____________?

  • (A)  Amino acids
  • (B)  Peptides
  • (C)  Peptones
  • (D)  All of the above
Submitted By :Ali Uppal


Which of the following is not a part of hemoglobin molecule___________?

  • (A)  Pyrrole rings
  • (B)  Vinyl groups
  • (C)  Histidine
  • (D)  Ferric ions
Submitted By :Ali Uppal


In Hartnup’s disease _______ is excreted in the urine?

  • (A)  Ornithine
  • (B)  Glutamine
  • (C)  Tryptophan
  • (D)  Phenylalanine
Submitted By :Ali Uppal


Thyroxine and catecholamines are derived from_____________?

  • (A)  Tyrosine
  • (B)  Tryptophan
  • (C)  Alanine
  • (D)  Leucine
Submitted By :Ali Uppal


Which of the following is present in the plasma but absent in the serum ?

  • (A)  Albumin
  • (B)  Globulin
  • (C)  Lecithin
  • (D)  Firbinogen
Submitted By :Ali Uppal


Synthesis of protein occurs on__________________?

  • (A)  Mitochondria
  • (B)  Poly ribosomes
  • (C)  Nucleus
  • (D)  Golgi bodies
Submitted By :Ali Uppal