I\'m really confused on this microbiology topic with antibodies and the receptor

Question

I'm really confused on this microbiology topic with antibodies and the receptors since it's in parts. Explanation on what the answer is would be helpful.

All of the following conditions would stimulate inflammation EXCEPT, 1. Binding of antigens to toll-like receptors.2. Induction of antiviral protein synthesis by interferon. 3. The opsonization of a bacterial cell by Ab and complement. 4. The release of cytokines by lymphocytes stimulated by foreign antigens. 5. The activation of components of the complment cascade reaction by Ab-Ag binding

Part A) Direct and immediate effect of release of interferon from an infected cell would result in:

1. Interferon binding to an interferon receptor on the surface of a nearby cell to stimulate the uninfected cell to transcribe and translate antiviral proteins. 2. Interferon binding to an interferon receptor on the surface of a nearby cell will prevent an infectious virus from infecting an uninfected cell. 3. Interferon release would stimulate the host cell to inhibit it's own replication. 4. Interferon release would stimulate the infected cell to begin the process of apotosis. 5. Interferon release would bind to T-helper cells to stimulate an immune response.

Part B) All of the following would most probably bind and stimulate to toll-like receptors EXCEPT, 1. Flagellin. 2. Mitochondrial glycolysis enzymes 3. Bacterial nucleotide sequences 4. Components of peptidoglycan 5. Liopolysaccharide

Part C) Which of the antibody types would Neirsseria gonorrhea cocci most probably first encounter in the mucus membranes of the reproductive tract?

1. IgD 2.IgM 3.IgE 4.IgG 5.IgA

Part D) Which of the following antibody types specific for a tetanus toxin would probably be most abudant in the blood plasma of a person who was vaccinated against tetanus two years ago?

1. IgD 2.IgE 3.IgA 4.IgM 5.IgG

Explanation / Answer

Part A)

Answer-1. Interferon binding to an interferon receptor on the surface of a nearby cell to stimulate the uninfected cell to transcribe and translate antiviral proteins.

Explanation- Interferons allow communication between cells by triggering the defense mechanism of the immune system which eradicate pathogens or tumors.

Part B)

Answer- 3. Bacterial nucleotide sequences

Explanation- Toll-like receptors (TLRs) are a class of proteins having a key role in the innate immune system. They are expressed in sentinel cells ( these are cells in the body's first line of defense).

Part C)

Answer- 5.IgA

Explanation-  The secretory immunoglobulin A (S-IgA) is present in genital secretions.

Part D)

Answer- 5.IgG

Explanation- IgG1 and IgG3 subclasses of antibodies are formed against proteins such as the toxins produced by tetanus bacteria,

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