Immune Response | MCQs

Explanation

Antibodies are proteins produced by the immune system to neutralize or destroy antigens (disease-causing agents).

They are a key part of the body’s defense mechanism against pathogens like bacteria and viruses.

Explanation

Explanation

A slippery outer covering in some bacteria that protects them from phagocytosis by host cells is Capsule.

Capsules can protect a bacterial cell from ingestion and destruction by white blood cells

Capsules confer resistance to phagocytosis.

Explanation

 The main purpose of white blood cells, also known as leukocytes, 

  They protect the body from infection and disease by fighting off harmful pathogens and other foreign substances. 

Explanation

During an infection, neutrophils (a type of white blood cell) are one of the first responders to the site of infection.

They engulf and destroy pathogens like bacteria through a process called phagocytosis.

Explanation

Antigens are typically glycoproteins or lipopolysaccharides found on the surface of pathogens.

These structures are recognized by the immune system and trigger an immune response.

Explanation

 White blood cells, also called leukocytes, are primarily responsible for fighting infections by engulfing and destroying harmful pathogens through a process called phagocytosis. 

Explanation

B cells are white blood cells that are specifically responsible for producing antibodies when the body detects a foreign pathogen like a bacteria or a virus. 

Explanation

Interferons are cytokines that help activate natural killer cells as part of the immune response

Explanation

Passive immunity is when an individual receives antibodies from an external source, such as from a mother's milk.