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Test: Respiration in Organisms - UPSC MCQ


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10 Questions MCQ Test Science & Technology for UPSC CSE - Test: Respiration in Organisms

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Test: Respiration in Organisms - Question 1

In insects, air enters the body through

Detailed Solution for Test: Respiration in Organisms - Question 1

Insect bodies have openings, called spiracles, along the thorax and abdomen. These openings connect to the tubular network, allowing oxygen to pass into the body, regulating the diffusion of CO2 and water vapor. 

Test: Respiration in Organisms - Question 2

Cellular respiration is carried out in the

Test: Respiration in Organisms - Question 3

Inhalation is the

Detailed Solution for Test: Respiration in Organisms - Question 3

The part of breathing during which oxygen rich air is taken in is called inhalation.

Test: Respiration in Organisms - Question 4

During exhalation, the ribs move

Detailed Solution for Test: Respiration in Organisms - Question 4

During exhalation, i.e. releasing air during respiration, the ribs move downwards to reduce the volume of the thoracic cavity.
During exhalation, your diaphragm relaxes and moves upward into the chest cavity. The intercostal muscles between the ribs also relax to reduce the space in the chest cavity. As they relax they position the rib cage downwards and inwards.

Test: Respiration in Organisms - Question 5

Plants breathe through their stomata located in their

Detailed Solution for Test: Respiration in Organisms - Question 5

Stomata are small openings on the leaves surface through which exchange of gases takes place in plants.

Test: Respiration in Organisms - Question 6

Gills are respiratory organs in

Detailed Solution for Test: Respiration in Organisms - Question 6

Gills are respiratory organs in fish. Gills intake oxygen from water.

What are gills What purpose do they serve in fish class 11 biology CBSE

Test: Respiration in Organisms - Question 7

When breakdown of glucose occurs with the use of oxygen, it is called

Test: Respiration in Organisms - Question 8

In anaerobic respiration which chemical substance is produced?

Detailed Solution for Test: Respiration in Organisms - Question 8

Anaerobic respiration occurs in the absence of oxygen and is less efficient than aerobic respiration. Unlike aerobic respiration, the end products here are ethyl alcohol as in alcoholic fermentation and lactic acid as in animal cells.

Thus Option C is correct.

Test: Respiration in Organisms - Question 9

More energy is released in

Detailed Solution for Test: Respiration in Organisms - Question 9

During aerobic respiration, complete oxidation of food takes place and more energy is released in form of ATP.

Test: Respiration in Organisms - Question 10

Which of the following animals breathe through skin as well as through lungs?

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