FC-CBSE-10-S-C5

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The four main life processes are________

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Nutrition, Respiration, Transportation, Excretion.

These are the fundamental activities that maintain life. Nutrition provides energy, respiration releases it, transportation distributes materials, and excretion removes wastes.

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Cell organelle which is the site of photosynthesis is____

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Chloroplast.

Chloroplasts contain chlorophyll, the green pigment that captures sunlight energy to convert CO₂ and water into glucose.

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The enzyme in saliva that breaks down starch is____

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Salivary Amylase.

This enzyme chemically digests starch (a complex carbohydrate) into simpler sugars like maltose, starting the process in the mouth itself.

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The role of HCl in the stomach is to______

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Kill bacteria and activate pepsin.

The acidic environment (pH 1-2) destroys most germs in food and provides the ideal condition for the enzyme pepsin to break down proteins.

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The end products of aerobic respiration are:

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CO₂, Water, and Energy (ATP).

In the presence of oxygen, glucose is completely broken down in the mitochondria into these products, releasing a large amount of energy.

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