MCQs on Immunity

Ans. C) Immune System

Explanation: The immune system's main job is to protect the body against disease-causing germs and to keep us healthy. The immune system is a huge and complex connected network of organs, cells, and antibodies that work together to keep the body healthy. Disease-causing germs, bacteria, and other microbes can be defeated by a strong immune system.

Ans. A) Antibody

Explanation: The body produces antibodies when a disease-carrying bacteria enters our body to fight against it. Antibodies are produced into the blood and mucosa by our immune system, where they attach to foreign compounds like pathogens and toxins and make them inactive. Antibodies are proteins that bind to specific molecules called antigens.

Ans. B) Acquired immunity

Explanation: B and T cells are involved in acquired immunity/adaptive immunity. The immunity that you acquire over the course of your life is known as acquired immunity. It might arise through vaccination, illness, disease exposure, or antibodies from another individual. Acquired immunity is also known as specific immunity because it adapts its attack to a specific antigen previously seen.

Ans. B) Innate immunity

Explanation: Innate immunity is present by birth in an organism. When a pathogen attacks, it is instantly activated. Certain barriers and defence mechanisms are built into innate immunity to keep foreign particles out of the body. This immunity aids us by supplying natural resistance components such as salivary enzymes, natural killer cells, healthy skin, and neutrophils, among others.

Ans. A) Immunology

Explanation: Immunology is an important branch of the medical and biological sciences that studies organisms' immune systems which defends us against several infections in a variety of ways. The default working of our immune system can lead to several chronic diseases including autoimmunity, allergie and cancer.

Ans. B) White blood cells

Explanation: White blood cells are part of our immune system which protects us from bacteria. They aid in the body's battle against infection and illness. These cells circulate within your bloodstream and tissues, detecting infection sites and responding to damage or disease by fighting any unknown pathogens that enter your body.

Ans. D) Salivary amylase

Explanation: Salivary amylase is a primary enzyme in saliva. It is a digestive enzyme that breaks down carbohydrates into smaller molecules, such as sugars. Large macromolecules are broken down into smaller components so that the body can digest starchy meals better. It also aids in the prevention of starch build-up on our teeth.

Ans. A) B-cells

Explanation: Antibodies generated by B cells in humoral immunity destroy germs and prevent the spread of illnesses. B cells are primarily responsible for producing antibodies that either tag an antigen for attack or directly neutralise it. An antigen can also be presented by B cells to T cells, causing them to become activated.

Ans. D) All of the above

Explanation: Innate immunity is present in an organism by birth itself. Natural killer cells, mast cells, eosinophils, and basophils are among the cells involved in innate immunity, whereas phagocytic cells such as macrophages, neutrophils, and dendritic cells work within the immune system to recognize and eliminate pathogens that might cause infection.

Ans. A) T cells

Explanation: T cells may be used to adaptively transmit cell-mediated immunity from an immunised organism to a naive organism, and cell-mediated clearing processes are principally involved. Certain pathogenic bacteria and viruses need a CMI response that involves T cells. T cells detect infected cells with the aid of specialised antigen-presenting cells in order to be eliminated.

Ans. C) Five

Explanation: Antibody, also known as immunoglobulin, is a protective protein made by the immune system in response to the presence of an antigen, which is a foreign material. Human antibodies are divided into five types (IgM, IgD, IgG, IgA, and IgE) based on their H chains, which provide each isotype-specific properties and functions.