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Respiration in Organisms Test - 5

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Respiration in Organisms Test - 5
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Weekly Quiz Competition
  • Question 1
    1 / -0
    What gas is exhaled during breathing?
    Solution
    During breathing, CO2 is exhaled and O2 is inhaled. Option B is correct.
  • Question 2
    1 / -0
    Fish breathe through ____.
    Solution
    • In aquatic animals such as fish, respiration takes place through special respiratory organs called gills.
    •  Gills are present on lateral sides of the head of fish.
    •  It is made of gill filaments present on gill arches which are heavily supplied with blood capillaries for an exchange of gases. 
    • The filaments increase the area of absorption.
    Hence the correct option is A "gills".
  • Question 3
    1 / -0
    ______ is used to break down glucose into carbon dioxide and water.
    Solution
    Oxygen is used to break down glucose into carbon dioxide and water. Option B is correct.
  • Question 4
    1 / -0
    Animals give out ______________ during respiration unlike plants. 
    Solution
    During respiration, oxygen is taken in and carbon dioxide is given out by the animals. Whereas, plants give out oxygen which animals breathe in. The process of inhalation and exhalation helps find the volume of the lungs. 
    Therefore, the correct answer is option C.
  • Question 5
    1 / -0
    Plants have tiny pores called ______ for exchange of oxygen and carbon dioxide.
    Solution
    Plants have tiny pores called stomata for exchange of oxygen and carbon dioxide. Option A is correct.
  • Question 6
    1 / -0
    In which of the following animals, respiration occurs without any specialized respiratory organ?
    Solution
    Earthworms do not have any specialized respiratory organs. They breathe through their skin. The exchange of gases (oxygen and carbon dioxide) takes place through the earthworm's skin by diffusion.
    Fish have gills, frogs have lungs and cockroaches have trachea as respiratory organs.
    Hence, option D is correct.
  • Question 7
    1 / -0
    Which of the following is the product of anaerobic respiration by yeast?
    Solution
    Anaerobic respiration in yeast produces carbon dioxide, ethanol, and energy.
    So, the correct answer is option C.

  • Question 8
    1 / -0
    Anaerobic breakdown of glucose in our muscles produces:
    Solution
    • In humans, anaerobic respiration occurs most frequently during vigorous exercise. 
    • In order to process energy, muscle cells have to switch to anaerobic pathways when their oxygen supply is depleted. 
    • The lack of oxygen leads to lactic acid formation due to the incomplete breakdown of glucose.

    Hence, the correct option is 'B'.

  • Question 9
    1 / -0
    Anaerobic respiration in animals produces:
    Solution
    In the process of anaerobic respiration, materials are incompletely oxidized into $$CO_2$$ and simple organic substances like alcohol ($$C_2H_2OH$$) or lactic acid . In yeast cells, anaerobic respiration (fermentation) produces carbon dioxide, ethanol (alcohol), ATP and water. In human cells, carbon dioxide is not produced in anaerobic respiration. Instead, lactate, ATP and water are produced. 
    So, the correct answer is 'Lactic acid and H$$_2$$O'.
  • Question 10
    1 / -0

    Respiratory structures in the insects are:

    Solution
    • Insects and some other invertebrates exchange oxygen and carbon dioxide between their tissues and the air by a system of air-filled tubes called the trachea. The trachea opens to the outside through small pores called spiracles.
    • Humans respire through the lungs while earthworms and frogs can respire through the skin.
    • Aquatic organisms like octopus, sea squid, and fishes respire through gills.

    So, the correct answer is option D. 

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