15 The gas that helps to break down food in our body and thus release energy is

oxygen

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carbon dioxide

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hydrogen

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nitrogen

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Solution

The correct option is A
oxygen

The explanation for the correct option:
(A)-Oxygen
Cellular respiration is the process of burning food inside the body with the help of oxygen.
It is a mechanism for generating energy from food.
The explanation for the incorrect option:
(B) Carbon dioxide
Photosynthesis is the process in which plants make their own food, and oxygen is produced along with it. Plants also consume oxygen for respiration, but they produce more than they consume.
$begin mathsize 14px style stack 6 C O subscript 2 open parentheses g close parentheses with Carbon space Dioxide below plus space stack 6 H subscript 2 O with Water below open parentheses l close parentheses yields with Chlorophyll below and sunlight on top stack C subscript 6 H subscript 12 O subscript 6 with Glucose below open parentheses aq close parentheses plus stack 6 O subscript 2 with Oxygen below open parentheses g close parentheses end style$
(C)-Hydrogen
The lightest element is hydrogen. Under normal circumstances, hydrogen is a diatomic gas with the formula $(H_{2})$ . It's colourless, odourless, tasteless, non-toxic, and extremely flammable.
(D)-Nitrogen
Air is composed of 78% of Nitrogen.
Nitrogen is also a major component of amino acids, the building blocks of proteins.
Final answer: A correct answer is an option (A).

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Similar questions

Q. The gas that helps to break down food in our body and thus release energy is
(a) oxygen.
(b) carbon dioxide.
(c) hydrogen.
(d) nitrogen.

Which life process helps in release of energy? and which gas is inhaled into our body during breathing?

Breathing is a process that
(i) Provides oxygen to the body.
(ii) Breaks down food to release energy.
(iii) Helps the body to get rid of carbon dioxide.
(iv) Produces water in the cells.
Which of the following correctly defines the functions of breathing?

The process of intake of oxygen to burn down food chemically and to release energy in the body is known as:

Breathing is a process that

(i) provides O₂ to the body.

(ii) breaks down food to release energy.

(iii) helps the body to get rid of CO₂.

(iv) produces water in the cells.

Which of the following gives the correct combination of functions of breathing?

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