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

Answer

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

Answer

Submitted By :Ali Uppal

Cytochromes are_____________?

• (A)  Pyridine nucleotides
• (B)  Riboflavin containing nucleotides
• (C)  Metal containing flavoproteins
• (D)  Iron-porphyrin proteins

Answer

Submitted By :Ali Uppal

Which of the following is a precursor of protoporphyrin_______________?

• (A)  Alanine
• (B)  Leucine
• (C)  Histidine
• (D)  Glycine

Answer

Submitted By :Ali Uppal

Proteins are absorbed from GIT as_____________?

• (A)  Amino acids
• (B)  Peptides
• (C)  Peptones
• (D)  All of the above

Answer

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

Answer

Submitted By :Ali Uppal

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

• (A)  Ornithine
• (B)  Glutamine
• (C)  Tryptophan
• (D)  Phenylalanine

Answer

Submitted By :Ali Uppal

Thyroxine and catecholamines are derived from_____________?

• (A)  Tyrosine
• (B)  Tryptophan
• (C)  Alanine
• (D)  Leucine

Answer

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

Answer

Submitted By :Ali Uppal

Synthesis of protein occurs on__________________?

• (A)  Mitochondria
• (B)  Poly ribosomes
• (C)  Nucleus
• (D)  Golgi bodies

Answer

Submitted By :Ali Uppal