Biochemistry MCQs

Page No. 24

True about G protein couple receptors is _________________ ?


aG proteins bind to hormones on the cell surface


bAll the three subunits alpha, beta and gamma should bind each other for G protein to act


cG Proteins act as inhibitory and excitatory because of difference in alpha subunit


dG protein is bound to GTP in resting state



Fatty acid oxidation occurs in______________?


aCytoplasm


bMicrosomes


cMitochondria


dAll of the above


View Answer Mitochondria

A fatty acid that is not synthesized in man is_____________?


aLinoleic acid


bOleic acid


cPalmitic acid


dStearic acid


View Answer Linoleic acid

The most important role of cholesterol is_____________?


aIt is a component of cell membrane


bIt is a precursor of polyunsaturated fatty acids


cIt stores up energy


dNone of the above



The major lipids that make up the cell membrane are_______________?


aTriglycerides


bPhospholipids


cSphingomyelins


dFatty acids


View Answer Phospholipids

Saponification means hydrolysis of fats by________________?


aAcid


bAlkali


cWater


dEnzymes


View Answer Alkali

Unsaturated fatty acids are converted to______________?


aProstaglandins


bCholesterol


cCell membrane lipid


dSaturated fatty acid


View Answer Prostaglandins

Which of the following is a phospholipid________________?


aGlycogen


bSphingomyelin


cProstaglandin


dOleic acid


View Answer Sphingomyelin

In Niemann-Pick’s disease the following substrance accumulate in CNS in excess______________?


aGlycerophosphatides


bPhosphoinositides


cPhosphosphingosides


dGlycerosphingosides


View Answer Phosphosphingosides

Limiting factory for fatty acid synthesis_________________?


aAceto acetate synthetase


bAcyl transferase


cAcetyl CoA carboxylase


dBiotin



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