Question # 1

Ozone is a layer of gases in ............. atmosphere of the Earth.

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Upper

Lower

Middle

Inner

These salts are responsible for preventing heart attacks.

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Salts of sodium

Salts of calcium

Salt of potassium

Salt of Magnesium

The weight of brain of an adult main is.

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1.5 kg

2.0 kg

2.5 kg

3.0 kg

A gene is inserted into a bacterium by.

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Tissue culture

Genetic engineering

Fermentation

Biodegradation

-------------------- is/are used to coat the backside of the mirror.

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Silver

Copper

Aluminium

Silver and Aluminium

Tartaric acid obtain form.

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Fats

Tarmarind , grapes

Apples

Citrus fruits

Fire works is an example of ........... reactions.

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Addition

Exothermic

Endothermic

Decomposition

James Webb telescope launched in space.

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20 December 2021

21 December 2021

22 December 2021

25 December 2021

A process by which a cell divides into two daughter cells.

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Life Cycle

Cell division

Cell Cycle

Alternationof generation.

In maize, there are hromosomes.

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14

16

20

48

The word alkaline has been taken form.

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Greek

Latin

Arabic

English

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