(a) Write the name and one function of respiratory pigment found in human beings.
(b) Why do lungs always contain a residual volume of air?
(c) Why is ATP known as energy currency of the living beings?
(a) Write the name and one function of respiratory pigment found in human beings.
(b) Why do lungs always contain a residual volume of air?
(c) Why is ATP known as energy currency of the living beings?
Official answer
(a) The respiratory pigment found in human beings is haemoglobin. One of its functions is to transport oxygen from the lungs to the body cells.
(b) Lungs always contain a residual volume of air because the lungs can never be completely emptied of air due to the depression that will be created. If the lungs were completely emptied, the lungs would collapse.
(c) ATP is known as the energy currency of the living beings because it is the energy that is immediately available for various activities like muscle contraction, protein synthesis, membrane transport etc.
Marking scheme
- 1.1 mark
- 2.1 mark
- 3.1 mark
Common mistakes
- 1.confusing haemoglobin with other respiratory pigments
- 2.not understanding the concept of residual volume
- 3.not knowing the function of ATP
Analysis and explanation
This question requires the student to recall the concepts related to life processes, specifically the respiratory pigment, the residual volume of air in the lungs, and the function of ATP. The student should be able to provide the correct name and function of the respiratory pigment, explain why the lungs always contain a residual volume of air, and describe why ATP is known as the energy currency of the living beings.
Interesting facts
haemoglobin is responsible for the red colour of blood
the residual volume of air in the lungs is about 1100-1200 mL
ATP is produced during cellular respiration
Question details
Q29 of 39 questions
- Board
- CBSE
- Class
- Class 10
- Subject
- Science
- Year
- 2025
- Section
- Section C
- Marks
- 3
- Type
- Short Answer
- Chapter
- Life Processes
- Topic
- Life Processes
- Bloom's level
- Remembering
- Syllabus topic
- Life Processes
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Frequently asked questions
How many marks does this question carry in CBSE Class 10 Science 2025?
This question carries 3 marks in the CBSE Class 10 Science 2025 examination.
Which chapter does this question come from in Science?
This question is from the chapter "Life Processes" in the CBSE Class 10 Science syllabus.
What topic does this question cover in Science?
This question covers the topic "Life Processes" from CBSE Class 10 Science.
What type of question is this in the CBSE Class 10 Science 2025 paper?
This is a Short Answer question from Section C in the CBSE Class 10 Science 2025 paper.