Class 7 Respiration In Organisms CBSE Questions & Answers

Class 7 · Respiration In Organisms

This is Science Class 7 Respiration in Organisms CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Smoking damage lungs and may cause
  • A
    Lung cancer
    Correct
  • B
    Typhoid
  • C
    Malaria
  • D
    Blood cancer
2
During inhalation, chest cavity ____________ in size.
  • A
    Increase
    Correct
  • B
    Decrease
  • C
    Either increase or decrease
  • D
    Remain same
3
Spiracles is small opening in lateral side for breathing in
  • A
    Frog
  • B
    Earthworm
  • C
    Cockroach
    Correct
  • D
    Cat
4
Insects have network of air tube for exchange of gases called
  • A
    Diaphragm
  • B
    Alveoli
  • C
    Trachea
    Correct
  • D
    Stomata
5
Inspiration is the process of
  • A
    Release of Oxygen rich air
  • B
    Taking in Oxygen rich air
    Correct
  • C
    Taking in $CO_2$ rich air
  • D
    Releasing of $CO_2$ rich air
6
Respiratory organs of plants include
  • A
    Stomata, trachoma and root hair
  • B
    Stomata, lenticels and root nodule
  • C
    Stomata, cork and root hair
  • D
    Stomata, lenticels and root hair
    Correct
7
What is the percentage of oxygen in inhaled air?
  • A
    0.164
  • B
    0.21
    Correct
  • C
    0.18
  • D
    0.24
8
Oxidation of food inside cell takes place in
  • A
    Ribosome
  • B
    Golgi bodies
  • C
    Chromosome
  • D
    Mitochondria
    Correct
9
Gills are well supplied with _____________ for exchange of gases.
  • A
    Blood vessels
    Correct
  • B
    Water tubes
  • C
    Membrane cells
  • D
    Phloem cells
10
Root of plants take air from air space present between
  • A
    Soil particles
    Correct
  • B
    Water molecules
  • C
    Cambium and cork cambium
  • D
    Gas particles
11
During exhalation, the ribs
  • A
    Remain same
  • B
    Moves down
    Correct
  • C
    Moves up
  • D
    Move outward
12
Respiration is essential for survival of organism because it
  • A
    Release water for absorption
  • B
    Release oxygen for photosynthesis
  • C
    Release energy from food
    Correct
  • D
    Increase carbon dioxide gas in air
13
During respiration, breakdown of food takes place
  • A
    Between the tissues
  • B
    Outside the cells
  • C
    Inside the lungs
  • D
    Within the cells
    Correct
14
Human being: aerobic respiration:: Yeast : ?
  • A
    Cellular respiration
  • B
    Aerobic respiration
  • C
    Nuclear respiration
  • D
    Anaerobic respiration
    Correct
15
Select the true statement.
  • A
    Breathing is part of respiration
    Correct
  • B
    Both respiration and breathing are same
  • C
    Respiration is part of breathing
  • D
    Breathing and respiration are two separate process