Tag: biotechnology

Questions Related to biotechnology

An antiviral protein released from infected and dying cells is

  1. antigen

  2. antibody

  3. antiserum

  4. interferon


Correct Option: D
Explanation:

Interferon is the name given to a group of proteins known primarily for their role in inhibiting viral infections and in stimulating the entire immune system to fight disease. Research has also shown that these proteins play numerous roles in regulating many kinds of cell functions. Interferons can promote or hinder the ability of some cells to differentiate, that is, to become specialized in their function. They can inhibit cell division, which is one reason why they hold promise for stopping cancer growth. Recent studies have also found that one interferon may play an important role in the early biological processes of pregnancy. Although once thought to be a potential cure-all for a number of viral diseases and cancers, subsequent research has shown that interferons are much more limited in their potential. 


So, the correct option is 'Interferon'.

Which of the following substances are produced by the body cells to protect uninfected cells from viral invasion ?

  1. Histamine

  2. Complement

  3. Natural killer cells

  4. Interferons


Correct Option: D
Explanation:

Interferons (IFNs) are a group of signaling proteins made and released by host cells in response to the presence of several viruses. In a typical scenario, a virus-infected cell will release interferons causing nearby cells to heighten their anti-viral defenses. Interferons are a group of proteins called cytokines produced by white blood cells, fibroblasts, or T-cells as part of an immune response to a viral infection or other immune trigger. The name of the proteins comes from their ability to interfere with the production of new virus particles.


So, the correct option is 'Option D'.

Interferons are produced in response to antigens

  1. True

  2. False


Correct Option: B
Explanation:

Interferon was named for its ability to interfere with viral proliferation. The various forms of interferon are the body’s most rapidly produced and important defense against viruses. Interferons can also combat bacterial and parasitic infections, inhibit cell division, and promote or impede the differentiation of cells. They are produced by all vertebrate animals and possibly by some invertebrates as well.

Interferons are categorized as cytokines, small proteins that are involved in intercellular signaling. Interferon is secreted by cells in response to stimulation by a virus or other foreign substance, but it does not directly inhibit the virus’s multiplication. Rather, it stimulates the infected cells and those nearby to produce proteins that prevent the virus from replicating within them.

So, the correct option is 'False'.

Read the following statements and select the option which identify the incorrect ones:
(i) Potato spindle tuber disease and Chrysanthemum stunt disease are caused by viroids.
(ii) $T _4$ bacteriophage exhibits lytic cycle.
(iii) Retroviruses have two copies of ssRNA.
(iv) Interferon which prevent viral multiplication are glycolipid particles.

  1. (ii) and (iii)

  2. (i) and (iv)

  3. (iii) only

  4. (iv) only


Correct Option: D
Explanation:

Interferons are a group of proteins called cytokines produced by WBC, fibroblasts, or T-cells as part of an immune response to a viral infection or other immune triggers. Interferons are proteinaceous in nature but not glycolipid in nature, thus interferon which prevents viral multiplication are protein particles.

So, the correct option is 'Interferon which prevents viral multiplication are glycolipid particles.'.

Against which of the following does interferon act?

  1. Bacteria

  2. Virus

  3. Snake venom

  4. None of the above


Correct Option: B
Explanation:

Interferons are a group of signaling proteins made and released by host cells in response to the presence of pathogens, such as viruses, bacteria, parasites, or tumour cells. They are a group of glycoproteins, produced by the immune system, that prevent viral replication in infected cells.

Therefore, the correct answer is option A and B.

Which one of the following, diseases is due to an allergic reaction?

  1. Enteric fever

  2. Hay fever

  3. Skin cancer

  4. Goitre


Correct Option: B
Explanation:

Hay fever or allergic rhinitis is the allergic response caused by the hypersensitivity of dust, mites, animal fur or hairs. It is characterized by the running nose, sneezing and watery, itchy eyes. Whereas enteric fever is caused by the bacteria, Skin cancer is caused by harmful radiation i.e., UV rays and Goiter is the metabolic disorder. Thus, the correct answer is option B.

Shock organ of allergy is?

  1. Spleen

  2. Heart

  3. Lungs

  4. Kidney


Correct Option: A

The primary treatment of anaphylaxis is the application of

  1. Epinephrine injection.

  2. Glucagon injection.

  3. Insulin injection.

  4. Both B and C.


Correct Option: A
Explanation:

A- Anaphylaxis is a rapid, severe and generalized allergic reaction which may lead to death. Prompt administration of epinephrine injection can be life-saving. Timely administration of epinephrine injection decreases hospitalizations and mortality. 

Anaphylactic shock is caused due to the release of which of the following hormone?

  1. Adrenalin

  2. Histamine

  3. Glucagon

  4. Somatostatin


Correct Option: B
Explanation:

Histamines are the inflammatory substances which are released by the mast cells and basophils during the allergic reactions. The excessive release of histamine may result in anaphylactic shock. Anaphylaxis is a type of severe allergic reaction which can result in the death of the person. Antihistamines are used for the treatment and cure of the allergic reactions.

Thus, the correct answer is option B. 

Which of the following is required for the cure of anaphylactic shock?

  1. Adrenalin

  2. Antihistamine

  3. Monoclonal antibodies

  4. None of the above


Correct Option: B
Explanation:

Anaphylaxis is a type of severe allergic reaction which can result in the death of the person. The first or the primary treatment which is provided, is that the person is injected with epinephrine which reduces the basic symptoms. Antihistamines are used for the treatment and cure of the allergic reactions. The antihistamines are molecules which are similar in structure to histamine and block the H1 receptors which prevent the release and action of histamines. 

Thus, the correct answer is option B.