Question # 1

Chromosoems are made of.

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DNA only

DNA, Proteins and fats

Proteins only

DNA, and proteins

Neuron or nerve cell is the basic structural and functional unit of.

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PNS and CNS

Nervous stem

Organ system

Spinal cord

It is made up of interneurons.

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Spinal cord

PNS

CNS

Medulla oblongata.

The relation R = V/I is discovered by a

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American scientist

German scientist

British Scientis

Russian scientist

During the combustion of fossil fuel. Which gas is ener the atmosphere.

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Nitrogen

Oxygen

Carbon di oxide

Hydrogen

Bases react with acids to form water and........

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Hydrogen ions

Ammonia

Salt

Hydroxide ions

Thermal decompositionof calcium carbonate produces a gas.

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Oxygen

Carbon di oxide

Nitrogen

Carbon monoxide

Tartaric acid obtain form.

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Fats

Tarmarind , grapes

Apples

Citrus fruits

The basic particle of an element is called.

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Compound

Mixture

Atom

None of these

Which factor is responsible for ecological imbalance.

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Over hunting

Change in water supply

Migration

All these

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