Question

Identify the wrong statement.

A. A vaccine is a biological preparation that contains active or weakened microbes.

B. Polio is an infectious disease caused by bacteria.

C. Cancer is caused due to abnormalities in DNA.

D. Lifestyle habits can cause diseases like obesity.

• A. A only
• B. B and C
• C. C only
• D. B only

Answer 1

The correct option is D

B only

The correct option is (D):

Statement (A):

1. Vaccine is made up of biological components including either active or weakened microbes.
2. These weakened microbes are unable to affect the individual, but it induces an immune response in the system.
3. It is used to develop the passive immunity against the pathogen so that the individual is protected against future infections.

Statement (B):

1. Polio is an infectious disease caused by a virus which affects the central nervous system.
2. Infection by the poliovirus causes muscle weakness in the patients.

Statement (C):

1. Cancer is a genetic disease caused as a result of changes in the DNA sequence.
2. Genetic abnormalities are caused as a result of mutations in the DNA which leads to alterations of the genes.

Statement (D):

1. Lifestyle diseases are caused due to leading an abnormal lifestyle.
2. Obesity is caused due to overeating and lack of exercise and hence it is a lifestyle disease.

Final Answer: The wrong statement is statement (B).