Tag: cell biology and biotechnology

Questions Related to cell biology and biotechnology

A substance (low molecular weight protein) produced by host cells in response to viral infection and protect other cells against further viral infection is _____________.

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  1. Phytotoxin

  2. Antibody

  3. Interferon

  4. Hormone

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Correct Option: C

Who discovered interferon?

biology cell biology and biotechnology stds and infertility gm crops biotechnology

  1. Isaacs and Lindenmann

  2. Holmes and Knight

  3. Hershey and Chase

  4. Enders

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Correct Option: A
Explanation:

G.M. Findley and McCallum (1937) reported a phenomenon, called viral interference in which the cell infected with one type of virus becomes reisstant to superinfection by other viruses. Alliac Issacs and Lindeman (1957) gave the term interferons to the chemical substances responsible for the viral inference. 

Which of the following processes involves transferring and combination of desirable characteristic features into plants and multiply them ?

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  1. Parthenocarpy

  2. Genetic engineering

  3. Eutrophication

  4. Broadcasting

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Correct Option: B
Explanation:

Genetic engineering is the branch of science which deals with the modification of genes. The desired genes is isolated from the host and are inserted into the vectors. The vectors carries the foreign gene into the desired organism and multiples. The foreign gene multiplies along with the vector and produce a new character.

So, the correct answer is option B.

During injury mast cells secrete 

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  1. Histamine

  2. Heparin

  3. Prothrombin

  4. Antibodies

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Correct Option: A
Explanation:

the mast cells of injured tissue secrete histamine, which causes the surrounding blood vessels to dilate and increase the permeability. It gives local immune response and act as neurotransmitter.
Thus, the correct answer is option A.

Allogeneic transplants require immunosuppressant drugs because these are transplants between

biology cell biology and biotechnology organ donation and body donation blood and organ donation stem cell

  1. Genetically different members of the same species.

  2. Genetically different members of different species.

  3. Genetically similar members of the same species.

  4. Genetically similar members of the different species.

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Correct Option: A
Explanation:

A- Allogenic transplant takes place between genetically different members of same species. Immunosuppressant drugs are used to suppress graft-versus-host disease (GVHD) which is the result of an intricate immune response following allogeneic stimuli due to allogenic transplant.

First heart transplant was performed by

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  1. William Harvey

  2. Christiaan Barnard

  3. Har Govind Khorana

  4. Walton Lillehel

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Correct Option: B
Explanation:

Christiaan Neethling Barnard was a South African cardiac surgeon who performed the world's first successful human-to-human heart transplant on 3 December 1967 and known as father of heart transplantation. 

Which organs of a brain dead individual can be donated?

biology cell biology and biotechnology organ donation and body donation blood and organ donation stem cell

  1. Liver

  2. Heart

  3. Eyes

  4. All of the above

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Correct Option: D
Explanation:

The vital organs of a brain dead person such as heart, liver, eyes, kidneys can be kept viable for few days if supported by artificial support.