Last updated on December 14th, 2023 at 08:36 am
Respiration in Organisms Class 7 MCQ
Respiration is essential for the survival of living organisms because it:
a. Releases glucose from the food
b. Releases energy from the food
c. Converts water into oxygen
d. Converts carbon dioxide into glucose
Answer: (b) Releases energy from the food
During cellular respiration, glucose is broken down into:
a. Oxygen and water
b. Carbon dioxide and water
c. Glucose and water
d. Oxygen and glucose
Answer: (b) Carbon dioxide and water
What is the process of respiration in which oxygen is taken inside the body and carbon dioxide is given out?
a. Cellular Respiration
b. Internal Respiration
c. External Respiration
d. Anaerobic Respiration
Answer: (c) External Respiration
Which respiratory organ do fish use to respire?
Stomata
Lenticels
Gills
Skin
Answer: (c) Gills
In humans, inhaled air passes through the nostrils and then into the lungs through the:
Esophagus
Windpipe
Bronchi
Larynx
Answer: (b) Windpipe
What type of respiration occurs during heavy exercise when the supply of oxygen to muscle cells is insufficient?
External Respiration
Aerobic Respiration
Anaerobic Respiration
Internal Respiration
Answer: (c) Anaerobic Respiration
Which type of respiration combines food molecules with oxygen inside cells into carbon dioxide and water along with energy?
External Respiration
Anaerobic Respiration
Internal Respiration
Aerobic Respiration
Answer: (d) Aerobic Respiration
During inhalation, our lungs:
Contract
Stay unchanged
Expand
Shrink
Answer: (c) Expand
In which part of the plant does gaseous exchange primarily occur during respiration?
Flowers
Roots
Stems
Leaves
Answer: (d) Leaves
Which type of organism respires through its entire body surface?
Earthworm
Fish
Frog
Insect
Answer: (d) Insect
In anaerobic respiration, food molecules are broken down without using:
Glucose
Carbon dioxide
Oxygen
Water
Answer: (c) Oxygen
The respiratory process that occurs through the skin in earthworms is known as:
Gaseous exchange
Cutaneous respiration
Stomatal respiration
Cellular respiration
Answer: (b) Cutaneous respiration
What is the primary purpose of external respiration (breathing) in animals?
To produce glucose
To eliminate carbon dioxide
To convert food into energy
To exchange oxygen and carbon dioxide
Answer: (d) To exchange oxygen and carbon dioxide
