Exams › NEET › Biology

Diphtheria is caused by

1. poisons released from dead bacterial cells into the host tissue
2. poisons released by living bacterial cells into the host tissue
3. excessive immune response by the host's body
4. poisons released by virus into the host tissues

Correct answer: poisons released by living bacterial cells into the host tissue

Solution

Diphtheria symptoms are caused by an exotoxin produced and secreted by living Corynebacterium diphtheriae cells. This matches poisons released by living bacterial cells into host tissue, not toxins from dead cells or viruses.

Related NEET Biology questions

• Diarrhea through food can be avoided by
• Renal rickets is related to old age
• Which is the drug used by health workers in the management of acute respiratory illness?
• Identify the correct pair representing the causative agent of typhoid fever and the confirmatory test for typhoid.
• Match the following diseases with the causative organism and select the correct option. Column-I: (a) Typhoid (b) Pneumonia (c) Filariasis (d) Malaria Column-II: (i) Wuchereria (ii) Plasmodium (iii) Salmonella (iv) Haemophilus
• The infectious stage of Plasmodium that enters the human body is

⚔️ Practice NEET Biology free + battle 1v1 →