NCERT Class VII Science Solutions: Chapter 10-Respiration in Organisms Part 1 (For CBSE, ICSE, IAS, NET, NRA 2023)

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Question 1:

Sometimes when we do heavy exercise, anaerobic respiration takes place in our muscle cells. What is produced during this process?

  1. Alcohol and lactic acid
  2. Alcohol and
  3. Lactic acid and
  4. Lactic acid only

Answer: D

Question 2:

Yeast is used in wine and beer industries because it respires

  1. Aerobically producing oxygen.
  2. Aerobically producing alcohol.
  3. Anaerobically producing alcohol.
  4. Anaerobically producing .

Answer: C

Question 3:

During the process of exhalation, the ribs move

  1. Down and inwards.
  2. Up and inwards.
  3. Down and outwards.
  4. Up and outward.

Answer: A

Question 4:

Breathing is a process that

  1. Provides to the body.
  2. Breaks down food to release energy.
  3. Helps the body to get rid of .
  4. Produces water in the cells.

Which of the following gives the correct combination of functions of breathing?

  1. (i) and (ii)
  2. (ii) and (iii)
  3. (i) and (iii)
  4. (ii) and (iv)

Answer: C

Question 5:

Fish breathe with the help of gills which are richly supplied with blood vessels. The gills help the fish to ′

  1. Take in oxygen from air.
  2. Take in oxygen dissolved in water.
  3. Absorb nutrients present in water.
  4. Release waste substances in water.

Answer: B

Question 6:

Earthworms and frogs breathe through their skin because of which the skin of both the organisms is

  1. Moist and rough.
  2. Dry and rough.
  3. Dry and slimy.
  4. Moist and slimy.

Answer: D

Earth Worm