Biology
Assertion (A): Both antiseptics and disinfectants are used to kill germs which can cause several diseases.
Reason (R): Antiseptics destroy germs from the surface of the body whereas disinfectants destroy germs from inside the body of living beings.
- A is True and R is False.
- A is False and R is True.
- Both A and R are True.
- Both A and R are False.
Answer
A is True and R is False.
Reason — Both antiseptics and disinfectants are used to kill or inhibit the growth of pathogenic microorganisms that can cause disease.
Antiseptics are used on living tissues (like skin) to kill or inhibit microbes e.g. Dettol, iodine. Disinfectants are used on non-living surfaces (floors, instruments) and not inside the human body, as they can be too harsh or toxic.
Related Questions
Assertion (A): The vaccine for tuberculosis is made up of living, fully poisonous germs.
Reason (R): Living, weakened germs in the vaccine were not satisfactory to prevent the disease.
- A is True and R is False.
- A is False and R is True.
- Both A and R are True.
- Both A and R are False.
Assertion (A): Active immunity is produced by one's own body.
Reason (R): Active immunity is induced by infection or by contact with immunogens.
- A is True and R is False.
- A is False and R is True.
- Both A and R are True.
- Both A and R are False.
Name the following:
(a) The drug based on arsenic compound, produced in 1910 which killed germs of syphilis.
(b) The antibiotic that was discovered first.
(c) The category of immunity required in the treatment of snake-bite.
(d) The medicines made by the combination of penicillin and sulpha drugs.
(e) The scientist who discovered the first antibiotic.
Write the full forms of the following abbreviations:
(a) AIDS
(b) BCG
(c) DPT
(d) DDT
(e) WHO
(f) HIV
(g) STD
(h) WBC
(i) TAB
(j) COVID-19