Biochemistry MCQs

Page No. 15

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


aHb→Heme→bilirubin→Urobilinogen


bHeme→Hb→Biliverdin→Urobilinogen


cHb→Heme→Bilverdin→Uro bilinogen


dHb→Heme→bilirubin→Urobilinogen→Biliverdin



Heme in haemoglobin is____________?


aBetween Helix C and D


bSurrounded by non polar environment


cBonded to E7 histidine


dProtoporophyrin IX


View Answer Protoporophyrin IX

Cytochromes are_____________?


aPyridine nucleotides


bRiboflavin containing nucleotides


c Metal containing flavoproteins


dIron-porphyrin proteins



Which of the following is a precursor of protoporphyrin_______________?


aAlanine


bLeucine


cHistidine


dGlycine


View Answer Glycine

Proteins are absorbed from GIT as_____________?


aAmino acids


bPeptides


cPeptones


dAll of the above


View Answer Amino acids

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


aPyrrole rings


bVinyl groups


cHistidine


dFerric ions


View Answer Ferric ions

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


aOrnithine


bGlutamine


cTryptophan


dPhenylalanine


View Answer Tryptophan

Thyroxine and catecholamines are derived from_____________?


aTyrosine


bTryptophan


cAlanine


dLeucine


View Answer Tyrosine

Which of the following is not a post transcriptional modification of RNA ?


aSplicing


b5′ capping


c3′ polyadenylation


dGlycosylation


View Answer Glycosylation

The protein rich in basic amino acids, which functions in the packaging of DNA is chromosomes is______________?


aHistone


bCollagen


cHyaluronic acid binding protein


dFibrinogen


View Answer Histone

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