Cellular senescence may have evolved to protect organisms against cancer. Instead of dividing out of control, the cells die. Cellular senescence appears to be regulated by several tumor suppressor genes, especially p53.what is the most appropriate reason behind this,

1) Transcription factor p53 is thought to suppress tumorigenesis by causing cell arrest and senescence in response to short telomeres, DNA damage, and viral or external signals to divide

2) This factor can stop the cell cycle, cause cellular senescence in rapidly dividing cells, instruct genes to initiate cellular apoptosis, and activate DNA repair enzymes.

3) Induction of apoptosis or cellular senescence by p53 always beneficial.

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#Question id: 15984

#Unit 12. Applied Biology

 Which of the following is the incorrect about the plant cell culture?

a) Whole plant is regenerate from a single plant cell

b) Production of secondary metabolites in plant cell culture is reduces by the addition of elicitors.

c) Transgenic plant easy to introduce into the plants than animals

d) Immobilization of plant cells can enhance secondary metabolite production during bioreactor cultivation

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#Question id: 853

#Unit 1. Molecules and their Interaction Relevant to Biology

In the presence of a large excess of _______ the disulfides (cystines) are fully converted into sulfhydryls (cysteines).

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#Question id: 23396

#General Aptitude

D − 4, F − 6, H − 8, J − 10

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#Question id: 14775

#Unit 13. Methods in Biology

A bag contains 3 black and 5 white balls. One ball is drawn from the bag. What is the probability that the ball is not black ?

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#Question id: 10344

#Unit 6. System Physiology – Plant

Some of the following caracteristics of Nitrite reductase, which one of the is incorrect?