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One haemoglobin carries how many molecul...

One haemoglobin carries how many molecules of `O_(2)` ?

A

`4`

B

`2`

C

`6`

D

`8`

Text Solution

Verified by Experts

The correct Answer is:
A
Hb contains a protein portion called globin and a pigment portion called heam. The heam portion consists of four atoms of iron, each capable of combining with a molecule of `O_(2)`, Thus, one Hb carries `4` molecules of `O_(2)`.
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NCERT FINGERTIPS ENGLISH-BREATHING AND EXCHANGE OF GASES-Breathing And Exchange Of Gases
  1. Blood carries the CO(2) in three forms. The correct percentages of CO(...

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  2. Bulk of oxygen diffuses from the plasma into the red blood corpuscles ...

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  3. One haemoglobin carries how many molecules of O(2) ?

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  4. The oxygen dissociation curve is

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  5. Which of the following is incorrect about the given graph ?

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  6. The given graph shows an oxygen dissociation curve for haemoglobin. ...

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  7. When temperature decrease, oxy-Hb curve becomes

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  8. Which of the following factors is not favourable for the formation of ...

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  9. Consider for following four statements and select the correct option s...

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  10. After taking a long deep breath we do not respire for some seconds due...

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  11. A large proportion of oxygen remain unused in the human blood even aft...

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  12. In the tissues, high concentrations of carbon dioxide

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  13. Fetal haemoglobin has X affinity for oxygen than that of mother's haem...

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  14. Statement 1 : About 70% of CO(2) that enters RBCs changes into HCO(3)^...

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  15. Match column I with column II and select the correct option from the c...

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  16. The enzyme that increases the reaction rate between CO(2) and H(2)O i...

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  17. Which of the following equations is correct ?

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  18. People living at sea level have around 5 million RBC per cubic millime...

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  19. During CO(2) transport, HCO(3)^(-) diffuses from erythrocytes to plas...

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  20. Identify the correct statement with reference to transport of respirat...

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