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Important Questions

Breathing and Exchange of Gases

Haryana Board · Class 11 · Biology

Most important questions from Breathing and Exchange of Gases for Haryana Board Class 11 Biology board exam 2026. MCQs, short answer, and long answer questions with marks.

98 questions25 flashcards5 concepts

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98 Questions·
multiple choicemultiple correct

Sample Questions

1multiple choice

How is most oxygen transported in the blood?

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Bound to red blood cells

About 97% of oxygen is transported by red blood cells bound to hemoglobin.

2multiple choice

What muscle helps create pressure changes during breathing?

Show answer

Intercostal muscles

Intercostal muscles between the ribs help create pressure gradients necessary for inspiration and expiration.

3multiple choice

What is the main site of gas exchange in the lungs?

Show answer

Alveoli

Alveoli are thin, irregular-walled, vascularized structures where actual gas exchange occurs.

4multiple choice

What percent of carbon dioxide is transported as bicarbonate?

Show answer

70%

Approximately 70% of carbon dioxide is transported as bicarbonate in the blood.

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Frequently Asked Questions

What are the important topics in Breathing and Exchange of Gases for Haryana Board Class 11 Biology?
Breathing and Exchange of Gases covers several key topics that are frequently asked in Haryana Board Class 11 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Breathing and Exchange of Gases — Haryana Board Class 11 Biology?
Understand the core concepts first, then work through the 98 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.
How many important questions are there in Breathing and Exchange of Gases?
There are 98 practice questions available for Breathing and Exchange of Gases. These cover multiple question types including MCQs, short answer, and long answer questions.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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