Biochemistry MCQs

Page No. 18

Iron absorption is decreased in presence of all except____________?


aPhytates


bAscorbic acid


cTannins


dPhosphates


View Answer Ascorbic acid

The sigma subunit of prokaryotic RNA polymerase_______________?


aBinds the antibiotic Rifampicin


bIs inhibited by a-amanitin


cSpecifically recognizes the promoter site


dIs part of the core enzyme



The patient suffered from hypogondism, failure to thrive, lose of taste and unable to maintain stability. This shows the deficiency of_____________?


a Zinc


bChromium


cCopper


dPotassium


View Answer Zinc

Ammonia produced by brain is trapped as_____________?


aUrea


bUric Acid


cCreatinine


dGlutamine


View Answer Glutamine

Serum creatine kinase-3 (CK-3) is elevated in_______________?


aMuscular dystrophy


bMyocardial infarction


cAlcoholic cirrhosis


dBrain tumours


View Answer Muscular dystrophy

Transcription is the synthesis of____________?


aSingle stranded complimentary copy of DNA


bDouble stranded complimentary copy of DNA


cComplimentary copy of RNA


dCOmplimentary copy of rRNA



Which of the following is used in recombinant DNA technology ?


aRestriction endonucleases


bPCR


cReverse transcriptase FISH


dNone of these



Denaturation of double stranded DNA involves_______________?


aIt gets broken down to nucleotides


bIt becomes single stranded reversibly


c It becomes single stranded irreversibly


d It becomes double stranded irreversibly



On complete hydrolysis of DNA we will get all the following except______________?


aDeoxy pentose sugar


bPhosphoric acid


cAdenosine


dPurine bases


View Answer Adenosine

R-RNA is mainly produced mainly in___________?


aNucleus


bNucleolus


cRibosome


dEndoplasmic reticulum


View Answer Nucleolus

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