Biology MCQs

Page No. 99

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


aRibosomes

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bCytoplasm

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cGolgi apparatus

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dEndoplasmic reticulum

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View Answer Golgi apparatus

Which one forms the raw material for coenzymes_______________________?


aVitamins

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bCarbohydrates

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cProteins

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dMetals

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View Answer Vitamins

Enzymes __________________ the activation energy of a chemical reaction?


aIncreases

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bDecreases

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cDoes not effect

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dIncreases or decreases depending upon individual enzyme

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View Answer Decreases

Amoeboid movements and movement of cyclosis is due to_________?


aMicrofilaments

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bMicrotubules

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cIntermediate filaments

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dCytoskeleton

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View Answer Microfilaments

Which step causes activation of catalytic site of an enzyme__________________?


aChange in pH of the surroundings.

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bFormation of Enzyme Susstrate complex.

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cChange in the charge of the active site.

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dChange in temperature

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Lock and Key model was proposed by______________?


aEmil Fischer

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bKoshland

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cRobin Williams

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dRudolph Virchow

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View Answer Emil Fischer

Ribonucleo-protein particles are the name of__________?


aDNA

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bNucleus

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cEukaryotic ribosomes

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dRNA

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View Answer Eukaryotic ribosomes

Chlorophyll is a/an _____ molecule?


aInorganic

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bCationic

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cAnionic

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dOrganic

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View Answer Organic

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


aF.Miescher

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bChargaff

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cWatson & Crick

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dHarshay & Chase

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View Answer Chargaff

The type of plastids which help in pollination is_________?


aChromoplasts

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bLeucoplasts

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cChloroplasts

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dAll of these

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View Answer Chromoplasts

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