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Published on: 08/06/2021
QB365 provides detailed and simple solution for every book back questions in class 11 Biology subject.It will helps to get more idea about question pattern in every book back questions with solution.
Download Tamil Nadu 11th Standard Biology question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Biology Test1.
Resistance in the airways is typically low. Why? Give two reasons.
2.
Which structure seals the larynx when we swallow?
3.
Name the enzyme that catalyses the bicarbonate formation in RBCs.
4.
Name the respiratory organs of flatworm, earthworm, fish, prawn, cockroach and cat.
5.
Air moving from the nose to the trachea passes through a number of structures. List in order of the structures.
1.
(i) Entry of air with high pressure may collapse the tracheal tree.
(ii) The smooth muscles which contract and relax to adjust the diameter of air passage with a typical resistance against airways under normal pressure.
2.
(i) A thin elastic flap called epiglottis is found in the upper respiratory tract.
(ii) It prevents the food from entering into the larynx.
(iii) It avoids choking of food.
3.
RBCs contain an enzyme carbonic anhydrase
(i) It catalyses the carbonic acid (H2CO3) which is unstable and breaks into HCO-3 and H+ ions.
(ii) This enzyme facilitates the reaction in both directions. They are
4.
| S.No. | Animals | Respiratory organs |
| 1. | Flatworm | Skin or body surface |
| 2. | Earthworm | Moist skin |
| 3. | Fish | Gills |
| 4. | Prawn | Gills |
| 5. | Cockroach | Trachea |
| 6. | Cat | Lungs |
5.
External nostrils → Nasal cavity → Internal nostrils → Nasopharynx → Larynx → Trachea → Bronchi → Bronchioles → Hilum → Lungs → Bronchioles → Alveoli
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Tamilnadu Stateboard 11th Standard Subjects
Maths
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Biology
Business Maths and Statistics
Accountancy
Computer Science
Physics
Chemistry
Maths
Biology
Economics
Physics
Chemistry
History
Business Maths and Statistics
Computer Science
Accountancy
Computer Applications
History
Computer Technology
Commerce
Computer Applications
Computer Technology
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English
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