What is Respiration Multiple Choice Questions (MCQ) PDF Download

MCQ 1: The waste products of the process of respiration are

1. oxygen + CO₂
2. carbon dioxide & water
3. food + oxygen
4. none of them

MCQ 2: The largest percentage composition in air is of

1. argon
2. oxygen
3. nitrogen
4. carbon dioxide

MCQ 3: The balance of two gases is very important for all communities, these two gases are

1. nitrogen & oxygen
2. carbon dioxide and oxygen
3. argon & nitrogen
4. none of them

MCQ 4: The act of breaking of food substances in order to release energy is known as

1. process
2. transpiration
3. respiration
4. photosynthesis

MCQ 5: Photosynthesis reduces the concentration of

1. carbon dioxide
2. oxygen
3. energy
4. neon