Question : Organisms use biocatalysts to break down complex substances into simpler substances. These biocatalysts are called ______.

Option 1: Enzymes

Option 2: Hormones

Option 3: Vitamins

Option 4: No option is correct

Question : The harmful substances produced by the microbes are known as:

Option 1: antibiotics

Option 2: pollutants

Option 3: hormones

Option 4: toxins

Question : The temperature of boiling water in a steam engine may be high because:

Option 1: there are dissolved substances in water

Option 2: there is low pressure inside the boiler

Option 3: there is high pressure inside the boiler

Option 4: the fire is at very high temperature

Question : The boiling point of water decreases at higher altitudes due to:

Option 1: low temperature

Option 2: low atmospheric pressure

Option 3: high temperature

Option 4: high atmospheric pressure

Question : Why boiling point of water decrease at high altitudes?

Option 1: Because of the high temperature

Option 2: Because of low atmospheric pressure

Option 3: Because of low temperature

Option 4: Because of high atmospheric pressure