Tag: cell biology and biotechnology

Quizzes (71) Questions (57)

Questions Related to cell biology and biotechnology

Multiple choice biology cell biology and biotechnology stds and infertility gm crops 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 _____________.

  1. Phytotoxin

  2. Antibody

  3. Interferon

  4. Hormone
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Interferons are signaling proteins released by host cells in response to the presence of several viruses. They cause nearby cells to heighten their anti-viral defenses.

Multiple choice biology cell biology and biotechnology stds and infertility gm crops biotechnology

Who discovered interferon?

  1. Isaacs and Lindenmann

  2. Holmes and Knight

  3. Hershey and Chase

  4. Enders
Reveal answer Fill a bubble to check yourself
A Correct answer
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. 

Multiple choice biology cell biology and biotechnology stds and infertility gm crops biotechnology

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

  1. Parthenocarpy

  2. Genetic engineering

  3. Eutrophication

  4. Broadcasting
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

During injury mast cells secrete 

  1. Histamine

  2. Heparin

  3. Prothrombin

  4. Antibodies
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

Allogeneic transplants require immunosuppressant drugs because these are transplants between

  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.
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

First heart transplant was performed by

  1. William Harvey

  2. Christiaan Barnard

  3. Har Govind Khorana

  4. Walton Lillehel
Reveal answer Fill a bubble to check yourself
B Correct answer
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.