Respiration in Organisms MCQs
Respiration in Organisms – MCQs with Answers & Explanations
Class: 7 | Subject: Science | Section: Respiration | Topic: Respiration in Organisms
Based on CBSE Board Examination Pattern
Based on CBSE Board Examination Pattern
These Multiple Choice Questions (MCQs) are designed strictly as per the NCERT syllabus, making them ideal for CBSE Class 7 Science examination standard. Each question includes detailed explanations for clear concept understanding.
1. Respiration is the process of:
Answer: B. Taking in oxygen and using it to release energy
Respiration is a cellular process where food is broken down using oxygen to release energy required for life activities.
2. The breathing rate increases during exercise because:
Answer: B. More oxygen is required
During exercise, muscles need more energy, so respiration increases, requiring more oxygen intake.
3. Breakdown of food without oxygen is called:
Answer: B. Anaerobic respiration
In absence of oxygen, food breaks down partially releasing less energy. Example: yeast fermentation.
4. Breathing involves:
Answer: A. Exchange of gases
Breathing includes inhalation of oxygen and exhalation of carbon dioxide.
5. Human respiratory organ is:
Answer: B. Lungs
Lungs help in gaseous exchange between blood and air.