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
Which of the following organism can survive without oxygen?
  • A
    Bacteria
  • B
    Earthworm
  • C
    Mosquito
  • D
    Yeast
    Correct
2
In absence of oxygen, glucose is broken down into
  • A
    Formic acid and oxygen
  • B
    Alcohol and oxygen
  • C
    Lactic acid and carbon dioxide
  • D
    Alcohol and carbon dioxide
    Correct
3
Muscles cell produce ______________ in presence of insufficient oxygen in case of sudden activities.
  • A
    Citric acid
  • B
    Acetic acid
  • C
    Alcohol
  • D
    Lactic acid
    Correct
4
The taking in of air rich in oxygen inside the body is called
  • A
    Inhabitation
  • B
    Exhabitation
  • C
    Exhalation
  • D
    Inhalation
    Correct
5
The number of times a human breath in a minute is called
  • A
    Pulse
  • B
    Cardiac cycle
  • C
    Breathing rate
    Correct
  • D
    Breathing number
6
Breathing rate is maximum during
  • A
    Standing
  • B
    Sleeping
  • C
    Laying
  • D
    Running fast
    Correct
7
We breath faster when our body require
  • A
    No energy
  • B
    Either more or less energy
  • C
    More energy
    Correct
  • D
    Less energy
8
During heavy exercise, breathing rate can increase up to
  • A
    35 times per minute
  • B
    25 times per minute
    Correct
  • C
    35 times per second
  • D
    25 times per second
9
Lungs are present in
  • A
    Stomach cavity
  • B
    Thoracic cavity
    Correct
  • C
    Abdominal cavity
  • D
    Oral cavity
10
Oxygen carrying capacity of human blood is reduced due to the pollution of
  • A
    NO
  • B
    CO
    Correct
  • C
    \({{\text{O}}_{\text{2}}}\)
  • D
    \({\text{C}}{{\text{O}}_{\text{2}}}\)
11
The amount of volume of air that can be inspired/expired normally is called
  • A
    Normal volume
  • B
    Tidal volume
    Correct
  • C
    Vital capacity
  • D
    Residual volume
12
How many molecules of oxygen are carried by one molecule of haemoglobin?
  • A
    4
    Correct
  • B
    6
  • C
    8
  • D
    2
13
From nasal cavity, air reaches to lungs through
  • A
    Arteries
  • B
    Wind pipe
    Correct
  • C
    Veins
  • D
    Food pipe
14
During inhalation, ribs moves up and diaphragm moves
  • A
    Downward
    Correct
  • B
    Upward
  • C
    Laterally
  • D
    Both upward and downward
15
Breathing involves
  • A
    Breaking down of complex food
  • B
    Release of energy
  • C
    Movement of diaphragm and shoulder bone
  • D
    Movement of diaphragm and rib cage
    Correct