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406 questions · page 33 of 41

ScienceBiologymedium

Q321.Proteins are made in the cell by:

ALysosomesBRibosomesCVacuolesDCentrioles

ScienceBiologyeasy

Q322.Which part of the cell is called its control centre?

ANucleusBCell membraneCVacuoleDRibosome

ScienceBiologyeasy

Q323.In which cell organelle does photosynthesis take place?

AMitochondrionBRibosomeCNucleusDChloroplast

ScienceBiologyeasy

Q324.Which pigment gives plants their green colour?

ACaroteneBHaemoglobinCChlorophyllDMelanin

ScienceBiologyeasy

Q325.What does DNA stand for?

ADinitrogen acidBDeoxyribonucleic acidCDeoxyribose nitrateDDual nucleic acid

ScienceBiologyeasy

Q326.What is the basic structural and functional unit of life?

ACellBTissueCOrganDAtom

ScienceChemistrymedium

Q327.Plaster of Paris is made by heating:

ALimestoneBSandCBauxiteDGypsum

ScienceChemistryeasy

Q328.Which light, non-flammable gas is used to fill balloons and airships?

AHydrogenBNeonCHeliumDNitrogen

ScienceChemistrymedium

Q329.Who discovered the neutron?

AJ. J. ThomsonBJames ChadwickCErnest RutherfordDEnrico Fermi

ScienceChemistrymedium

Q330.Who discovered the electron?

AJ. J. ThomsonBErnest RutherfordCJames ChadwickDNiels Bohr

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