Science MCQs

A key feature of adaptive immunity is its memory; it remembers pathogens for a faster response in the future.

Community measures like vaccination campaigns and promoting hygiene help prevent the spread of diseases.

Melanin is a pigment that darkens the skin and protects it from the harmful effects of ultraviolet sunlight.

Tears wash away irritants and pathogens, and blinking helps spread tears and remove debris.

Cilia are hair-like structures that move mucus and trapped particles out of the airways to be swallowed or expelled.

Inflammation causes redness, swelling, pain, heat, and sometimes loss of function. Antibodies are part of the specific immune response, not the initial inflammatory response.

An antigen is any substance that causes your immune system to produce antibodies against it.

Antibodies are specifically shaped to bind to a particular antigen, much like a key fits into a lock.

Passive immunity is the transfer of ready-made antibodies from one individual to another, such as through breast milk.

Measles is caused by the measles virus.