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
Respiratory organ of frog is/are
  • A
    Lung and spiracles
  • B
    Skin and spiracles
  • C
    Lungs and gills
  • D
    Lungs and skin
    Correct
2
Cell membrane is used as respiratory organ in
  • A
    Insects
  • B
    Frog
  • C
    Earthworm
  • D
    Amoeba
    Correct
3
Fermentation is
  • A
    Digestive process
  • B
    Anaerobic respiration
    Correct
  • C
    Excretory process
  • D
    Aerobic respiration
4
Which one is known as energy currency of the living cells?
  • A
    ADP
  • B
    UTP
  • C
    GTP
  • D
    ATP
    Correct
5
Production of sound in human being is due to presence of
  • A
    Vocal cord
    Correct
  • B
    Cilia
  • C
    Cartilage rings
  • D
    Goblet cell
6
Most common respiratory substrate is
  • A
    Protein
  • B
    Fat
  • C
    Glucose
    Correct
  • D
    Organic acid
7
Breathing is
  • A
    Inhalation and exhalation
    Correct
  • B
    Breaking down of food
  • C
    Only inhalation
  • D
    Only exhalation
8
In higher plants gaseous exchange takes place through
  • A
    Stomata
  • B
    Lenticels
  • C
    All body parts
    Correct
  • D
    Root hair
9
Opening of pharynx to larynx is guarded by
  • A
    Voice box
  • B
    Sphincter
  • C
    Epiglottis
    Correct
  • D
    Salivary gland
10
Wind pipe is also called
  • A
    Oesophagus
  • B
    Trachea
    Correct
  • C
    Larynx
  • D
    Pharynx
11
The most common substrate of respiration is
  • A
    Glucose
    Correct
  • B
    Fatty acids
  • C
    Lactic acid
  • D
    Amino acids
12
Red blood cells carry oxygen due to presence of ____________ in blood.
  • A
    Globules
  • B
    Goblet cells
  • C
    All of these
  • D
    Haemoglobin
    Correct
13
Muscles cells produce ________________ during sudden activity.
  • A
    Ascorbic acid
  • B
    Tartaric acid
  • C
    Citric acid
  • D
    Lactic acid
    Correct
14
Opening and closing of stomata is controlled by
  • A
    Guard cells
    Correct
  • B
    Accessory cells
  • C
    Mesophyll cells
  • D
    Spongy cells
15
Size of thoracic cavity is changed due to action of
  • A
    Stomach
  • B
    Diaphragm
    Correct
  • C
    Chest bone
  • D
    Rib cage