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
Production of alcohol by yeast is called
  • A
    Brewing
  • B
    All of these
  • C
    Fermentation
    Correct
  • D
    Respiration
2
Lime water turns milky in presence of
  • A
    Sulpher dioxide gas
  • B
    Oxygen gas
  • C
    Carbon dioxide gas
    Correct
  • D
    Nitrogen gas
3
Size of thoracic cavity is changed due to action of
  • A
    Diaphragm
    Correct
  • B
    Chest bone
  • C
    Stomach
  • D
    Rib cage
4
Glycolysis takes place in
  • A
    Mitochondria
  • B
    Golgi bodies
  • C
    Ribosome
  • D
    Cytoplasm
    Correct
5
The number of ATP molecules produced during aerobic respiration is
  • A
    8
  • B
    28
  • C
    38
    Correct
  • D
    18
6
Surface area of gills increase due to presence of
  • A
    Silts
  • B
    Alveoli
  • C
    Pores
  • D
    Lamellae
    Correct
7
Conversion of milk in curd is due to
  • A
    Fermentation
    Correct
  • B
    Boiling
  • C
    Heating
  • D
    Spoilage
8
The product of Glycolysis is
  • A
    Pyruvic acid
    Correct
  • B
    Lactic acid
  • C
    Citric acid
  • D
    Carbon dioxide and water
9
Kreb’s cycle occurs inside
  • A
    Mitochondria
    Correct
  • B
    Ribosome
  • C
    Lysosomes
  • D
    Food vacuoles
10
The process complementary to respiration is
  • A
    Transportation
  • B
    Breathing
  • C
    Photosynthesis
    Correct
  • D
    Nutrition
11
Respiratory surface should be
  • A
    Thick, impermeable and richly supplied with blood
  • B
    Thin walled, moist and devoid of blood vessels
  • C
    Thin walled, impermeable and moist
  • D
    Thin, permeable and richly supplied with blood
    Correct
12
Hiccups can be best described as
  • A
    Some body is remembering you.
  • B
    Jerky incomplete inspiration
    Correct
  • C
    Jerky incomplete expiration
  • D
    Forceful sudden expiration
13
Respiration in addition to producing energy also carries out function of
  • A
    Producing the major part of body heat
    Correct
  • B
    Producing food
  • C
    Maintaining the water level
  • D
    All of the above
14
The expired air differ from inspired air in
  • A
    Having more oxygen and less carbon dioxide
  • B
    Having more carbon dioxide and less oxygen
    Correct
  • C
    Having more oxygen and water vapour
  • D
    Having only carbon dioxide gas
15
The metallic element present in haemoglobin is
  • A
    Copper
  • B
    Magnesium
  • C
    Nickel
  • D
    Iron
    Correct