4 DECEMBER 2020 CURRENT AFFAIRS QUIZ

Polysaccharides on the surface of infecting microorganisms can also activate complement directly in the absence of

None of these

antigen via the alternative pathway

antibody via metabolic pathway

antibody via the alternative pathway

TRUE ANSWER : ?
YOUR ANSWER : ?

Plasma cells produce thousands of __________ that are released into the bloodstream

antibodies

antigens

helper T cells

virus fragments

TRUE ANSWER : ?
YOUR ANSWER : ?

In cellular immunity, T lymphocytes are responsible for the recognition and killing of foreign invaders. The cells are

both (a) and (b)

killer T cells

None of these

cytotoxic T lymphocytes (CTL)

TRUE ANSWER : ?
YOUR ANSWER : ?

What is a protein produced by host cells infected by viruses?

Vaccine

Histamine

Antiserum

Interferon

TRUE ANSWER : ?
YOUR ANSWER : ?

What is the result of an abnormal response of the immune system to part of a person's own body?

An allergic response

An autoimmune disease

Cancer

Passive immunity

TRUE ANSWER : ?
YOUR ANSWER : ?

To detect a humoral immune response to influenza virus, it is possible to measure

cytotoxicity of virus-infected cells in tissue culture

plasma cytokine levels

dividing T cells in the draining lymph nodes

serum antibody titer

TRUE ANSWER : ?
YOUR ANSWER : ?

What are the solutions prepared from weakened or dead microorganisms, viruses, or toxins that provide some immunity from diseases?

Antibiotics

Drugs

Vaccines

Histamines

TRUE ANSWER : ?
YOUR ANSWER : ?

During exposure to a foreign invader, there are more __________ present in the vertebrate body than before exposure

macrophages and antigens

antibodies

all of these

lymphocytes

TRUE ANSWER : ?
YOUR ANSWER : ?

Immunogenicity

is not a property of antibodies

depends on the ability of the native antigen to be presented by MHC

is usually a property of self antigens such as eye tissue

is not a property of haptens

TRUE ANSWER : ?
YOUR ANSWER : ?

Antibodies bound to an invading microorganism activate the complement system via

metabolic pathway

Entner-Doudoroff pathway

classical pathway

Embden Meyerhof pathway

TRUE ANSWER : ?
YOUR ANSWER : ?

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