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Q.

The main source of energy in humans beings is-

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a

Fats

b

Carbohydrates

c

Proteins

d

None of the above

answer is B.

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Detailed Solution

Concept: Every cell in our body needs energy to perform a specific type of activity, as is common knowledge. The manufacture of specific materials, synthesis, and other internal cell processes all require energy, whereas muscular work like holding, lifting, and waking things does not.
The main source of energy needed to perform any task is carbohydrate-based. They are further divided into their monomeric components. These are then further processed and changed into glucose. Cells utilise glucose to create energy (ATP). The mitochondria rely on them for cellular respiration.
Hence, the correct answer is option 2.

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