Chapter 16: Chemistry in Everyday Life

Which of the following statements are incorrect about receptor proteins?

(i) Majority of receptor proteins are embedded in the cell membranes.

(ii) The active site of receptor proteins opens on the inside region of the cell.

(iii) Chemical messengers are received at the binding sites of receptor

proteins.

(iv) The shape of the receptor doesn’t change during the attachment of the messenger.

Which of the following are not used as food preservatives?

(i) Table salt

(ii) Sodium hydrogen carbonate

(iii) Cane sugar

(iv) Benzoic acid

Compounds with antiseptic properties are ______________.

(i) CHCl3

(ii) CHI3

(iii) Boric acid

(iv) 0.3 ppm aqueous solution of Cl2

Which of the following statements about barbiturates is correct?

(i) Hypnotics or sleep-producing agents.

(ii) These are tranquillizers.

(iii) Non-narcotic analgesics.

(iv) Pain reduction without disturbing the nervous system.

Which of the following are sulpha drugs?

(i) Sulphapyridine

(ii) Prontosil

(iii) Salvarsan

(iv) Nardil

Which of the following are antidepressants?

(i) Iproniazid

(ii) Phenelzine

(iii) Equanil

(iv) Salvarsan

Which of the following statements is incorrect about penicillin?

(i) An antibacterial fungus.

(ii) Ampicillin is its synthetic modification.

(iii) It has a bacteriostatic effect.

(iv) It is a broad-spectrum antibiotic.

Which of the following compounds are administered as antacids?

(i) Sodium carbonate

(ii) Sodium hydrogen carbonate

(iii) Aluminium carbonate

(iv) Magnesium hydroxide

Amongst the following antihistamines, which are antacids?

(i) Ranitidine

(ii) Brompheniramine

(iii) Terfenadine

(iv) Cimetidine

Veronal and luminal are derivatives of barbituric acid, which are __________.

(i) Tranquillizers

(ii) Non-narcotic analgesic

(iii) Antiallergic drugs

(iv) Neurologically active drugs