Biology MCQs

Page No. 99

Proteins and lipids are converted into glycolipids and glycoproteins by adding carbohydrates by___________?


aRibosomes


bCytoplasm


cGolgi apparatus


dEndoplasmic reticulum


View Answer Golgi apparatus

Which one forms the raw material for coenzymes_______________________?


aVitamins


bCarbohydrates


cProteins


dMetals


View Answer Vitamins

Enzymes __________________ the activation energy of a chemical reaction?


aIncreases


bDecreases


cDoes not effect


dIncreases or decreases depending upon individual enzyme


View Answer Decreases

Amoeboid movements and movement of cyclosis is due to_________?


aMicrofilaments


bMicrotubules


cIntermediate filaments


dCytoskeleton


View Answer Microfilaments

Which step causes activation of catalytic site of an enzyme__________________?


aChange in pH of the surroundings.


bFormation of Enzyme Susstrate complex.


cChange in the charge of the active site.


dChange in temperature



Lock and Key model was proposed by______________?


aEmil Fischer


bKoshland


cRobin Williams


dRudolph Virchow


View Answer Emil Fischer

Ribonucleo-protein particles are the name of__________?


aDNA


bNucleus


cEukaryotic ribosomes


dRNA


View Answer Eukaryotic ribosomes

Chlorophyll is a/an _____ molecule?


aInorganic


bCationic


cAnionic


dOrganic


View Answer Organic

Purines and pyrimidines are in equal ration in DNA. It was indicated by_______________?


aF.Miescher


bChargaff


cWatson & Crick


dHarshay & Chase


View Answer Chargaff

The type of plastids which help in pollination is_________?


aChromoplasts


bLeucoplasts


cChloroplasts


dAll of these


View Answer Chromoplasts

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