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
Which of the following animals respires through its thin, moist, and smooth skin when in water and by lungs when on land?
Fish
Frog
Insect
Earthworm
Answer: (b) Frog
What is the name of the openings in stems that allow gaseous exchange by diffusion during respiration?
Lenticels
Stomata
Bronchi
Trachea
Answer: (a) Lenticels
What happens to the respiratory rate during external respiration when an organism engages in heavy exercise?
The respiratory rate decreases
The respiratory rate remains the same
The respiratory rate increases
The respiratory rate stops temporarily
Answer: (c) The respiratory rate increases
What is the process in which food molecules are combined with oxygen and get oxidized inside cells into carbon dioxide and water along with energy?
Anaerobic Respiration
Internal Respiration
External Respiration
Aerobic Respiration
Answer: (d) Aerobic Respiration
Which gas is used to breakdown glucose into carbon dioxide and water during respiration?
Carbon dioxide
Oxygen
Nitrogen
Hydrogen
Answer: (b) Oxygen
The breakdown of glucose occurs in the cells of an organism and is known as:
Photosynthesis
Cellular respiration
Digestion
Fermentation
Answer: (b) Cellular respiration
What is the term for respiration that occurs with the use of oxygen?
Anaerobic respiration
External respiration
Aerobic respiration
Internal respiration
Answer: (c) Aerobic respiration
During heavy exercise when oxygen supply to muscle cells is insufficient, what type of respiration occurs?
Aerobic respiration
Internal respiration
External respiration
Anaerobic respiration
Answer: (d) Anaerobic respiration
What is the purpose of breathing in the process of respiration?
To release energy from glucose
To take in oxygen-rich air
To convert carbon dioxide into oxygen
To produce glucose from water and carbon dioxide
Answer: (b) To take in oxygen-rich air
What happens to the lungs during inhalation?
They contract
They remain unchanged
They expand
They release carbon dioxide
Answer: (c) They expand
In which animals are the respiratory organs and process of breathing similar to those in humans?
Insects
Fish
Cows and buffaloes
Earthworms
Answer: (c) Cows and buffaloes
How does gaseous exchange occur in earthworms, fishes, and insects, respectively?
Through gills, tracheae, and moist skin
Through tracheae, moist skin, and gills
Through moist skin, gills, and tracheae
Through gills, moist skin, and tracheae
Answer: (b) Through tracheae, moist skin, and gills
