MCQ Exchange and Transport of Gases, Class 11 Biology

1. There will be total 20 MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying

1. Oxygen-carrying capacity of human blood is reduced due to the pollution of

O₃

CO

CO₂

SO₂

Question 1 of 20

2. What is true about haemoglobin?

It contains six pyrrole rings attached to iron element at the centre.

It contains four pyrrole rings attached to iron element at the centre.

It contains a carbohydrate part called globin.

None of the above

Question 2 of 20

3. Which of the following is the cofactor of carbonic anhydrase?

Zn

Cu

Fe

Mg

Question 3 of 20

4. Binding of oxygen with haemoglobin tends to displace carbon dioxide from the blood. This phenomenon is called

Chloride shift

Hamburger shift

Haldane effect

None of the above

Question 4 of 20

5. The bulk of CO₂ released from body fluids into the blood is present as

Bicarbonate in blood plasma and RBCs

Free CO₂ in blood plasma

70% as carbaminohaemoglobin and 30% as bicarbonate

Carbaminohaemoglobin in RBCs

Question 5 of 20

6. About 97% of O₂ is transported by RBCs. The remaining 3%

Is in peroxisomes

Is inside the mitochondria

Is attached to cell membranes

Remains in the lungs

Is dissolved in plasma and transported

Question 6 of 20

7. It is known that exposure to carbon monoxide is harmful to animals because

It reduces O₂ transport.

It reduces CO₂ transport.

In increases CO₂ transport.

It destroys haemoglobin.

Question 7 of 20

8. The majority of carbon dioxide produced by our body cells is transported to the lungs

As bicarbonates

Attached to haemoglobin

Dissolved in the blood

As carbonates

Question 8 of 20

9. The oxygen dissociation curve is

Sigmoid

Hyperbolic

Parabolic

Straight

Question 9 of 20

10. Hamburger shift is also known as

Bicarbonate shift

Chloride shift

Potassium shift

All of the above

Question 10 of 20

11. The chloride shift occurs in response to

A

B

C

D

Question 11 of 20

12. Haemoglobin is a

Carbohydrate

Fat

Reproductive pigment

Respiratory pigment

Question 12 of 20

13. The partial pressure of oxygen in the lungs is

60 mm Hg

100 mm Hg

110 mm Hg

40 mm Hg

Question 13 of 20

14. Blood analysis of a patient reveals an unusually high quantity of carboxyhaemoglobin content. Which of the following conclusions is most likely to be correct? The patient has inhaled polluted air containing high content of

Carbon dioxide

Chloroform

Carbon monoxide

Carbon disulphide

Question 14 of 20

15. How much percent of CO₂ is present in expired air?

0.04%

5.3%

7%

3.6%

Question 15 of 20

16. The enzyme essential for the transport of CO₂ as bicarbonate in the blood is

Lactase

Thrombokinase

Carbonic anhydrase

Carboxypeptidase

Succinic dehydrogenase

Question 16 of 20

17. Which one of the following can bind several hundred times more strongly to the haemoglobin than oxygen?

H₂CO₃

CO₂

SO₂

CO

Question 17 of 20

18. In Hamburger’s phenomena, which ion is transported?

K⁺

Na⁺

Mg⁺⁺

C^-

Question 18 of 20

19. Oxygen is carried by

Leucocytes

Erythrocytes

Platelets

None of the above

Question 19 of 20

20. One molecule of haemoglobin carries how many molecules of oxygen?

Two

Eight

Six

Four

Question 20 of 20

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