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Assertion (A): Receptor proteins show se...

Assertion (A): Receptor proteins show selectivity for one chemical messenger over the other.
Reason (R) : Chemical messenger binds to the receptor site and inhibits its natural function.

A

(A) and (R ) both are correct statement but reason does not explain (A)

B

(A) and (R ) both are correct statements and (R ) explains the (A)

C

Both (A) and (R ) are wrong statement

D

(A) is correct statement and (R ) is wrong statement

Text Solution

Verified by Experts

The correct Answer is:
D
Chemical messengers are received at the binding sites of receptor and gives message to the cell without entering the cell
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CHHAYA PUBLICATION-CHEMISTRY IN EVERYDAY LIFE -SOLVED NCERT EXEMPLAR PROBLEMS
  1. Explain the role of allosteric site in enzyme inhibition?

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  2. How are receptor proteins located in the cell membrane?

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  3. What happens when the bond formed between an enzyme and an inhibitor i...

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  4. Assertion (A): Penicillin (G) is an antihistamine. Reason (R): Peni...

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  5. Assertion (A): Sulpha drug contain sulphonamide group. Reason (R) ...

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  6. Assertion (A): Receptors are crucial to body's communication process. ...

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  7. Assertion (A): Enzymes have active sites that hold substrate molecule ...

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  8. Assertion (A): Chemical messengers are chemicals that enable communica...

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  9. Assertion (A): Transparent soaps are made by dissolving soaps in ethan...

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  10. Assertion (A): Sodium chloride is added to precipitate soap after sapo...

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  11. Assertion (A): Competitive inhibitors compete with natural substrate f...

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  12. Assertion (A) : Non-competitive inhibitor inhibits the catalytic activ...

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  13. Assertion (A) : Chemical messenger gives message to the cell without e...

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  14. Assertion (A): Receptor proteins show selectivity for one chemical mes...

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  15. Assertion (A) : All chemicals added to food items are called food pres...

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  16. Assertion (A) : Preservative are added to food items. Reason (R) : ...

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  17. Assertion (A): Artificial sweeteners are added to the food to control ...

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  18. In what respect do prontosil and salvarsan resemble. Is there any rese...

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  19. How do enzymes catalyse a chemical reaction in the living system? Expl...

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  20. Synthetic detergents have advantage over usual soaps as far as cleansi...

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