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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

Test: Respiration in Organisms for UPSC 2024 is part of Science & Technology for UPSC CSE preparation. The Test: Respiration in Organisms questions and answers have been prepared according to the UPSC exam syllabus.The Test: Respiration in Organisms MCQs are made for UPSC 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Respiration in Organisms below.
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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

Inhalation is the

Detailed Solution for Test: Respiration in Organisms - Question 2

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

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Test: Respiration in Organisms - Question 3

During exhalation, the ribs move

Detailed Solution for Test: Respiration in Organisms - Question 3

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 4

Plants breathe through their stomata located in their

Detailed Solution for Test: Respiration in Organisms - Question 4

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

Test: Respiration in Organisms - Question 5

Gills are respiratory organs in

Detailed Solution for Test: Respiration in Organisms - Question 5

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 6

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

Detailed Solution for Test: Respiration in Organisms - Question 6

Explanation:

  • Frogs have a specialized skin that is permeable to gases, allowing them to absorb oxygen and release carbon dioxide through their skin.
  • When frogs are on land, they primarily use their lungs to breathe. However, when they are in water or in damp environments, they rely more on their skin for respiration.
  • This dual breathing system allows frogs to adapt to different environments and survive in a variety of conditions.
Test: Respiration in Organisms - Question 7

What is the process in cells where breakdown of food happens with the use of oxygen called?

Detailed Solution for Test: Respiration in Organisms - Question 7

When cells break down food with the help of oxygen, it is called aerobic respiration. This is like how our bodies get energy from the food we eat by using oxygen. It helps us move, play, and do all our activities!

Test: Respiration in Organisms - Question 8

Yeasts are single-celled organisms that respire anaerobically and yield _____ and ________during this process.

Detailed Solution for Test: Respiration in Organisms - Question 8

Yeasts are single-celled organisms. They respire anaerobically and during this process yield alcohol. In this process glucose breaks down into alcohol (ethanol) and carbon dioxide.

Test: Respiration in Organisms - Question 9

Why does an athlete breathe faster and deeper than usual after finishing a race?

Detailed Solution for Test: Respiration in Organisms - Question 9

Athletes breathe faster and deeper after a race to supply more oxygen to their cells. During intense physical activity, the body's demand for energy is high, but the oxygen supply is limited. This leads to anaerobic respiration in muscle cells. After the race, rapid and deep breathing helps replenish the oxygen deficit. Interestingly, some athletes practice controlled breathing techniques to improve their performance and recovery.

Test: Respiration in Organisms - Question 10

What is the normal range of breathing rate per minute for an average adult at rest?

Detailed Solution for Test: Respiration in Organisms - Question 10

The normal range of breathing rate per minute for an average adult at rest is typically between 12 and 18 breaths per minute. From the options you provided, the closest range is 15-18 breaths per minute.

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