#Question id: 9149
#Unit 9. Diversity of Life Forms
In creating global climate patterns, which of the following factors is the primary cause of all of the other factors that are listed?
#Question id: 11005
#Unit 7. System Physiology – Animal
Which of the following phases of the cardiac cycle follows immediately after the beginning of the QRS wave?
#Question id: 24109
#General Aptitude
#Question id: 375
#Unit 1. Molecules and their Interaction Relevant to Biology
The aqueous solution with the lowest pH is:
#Question id: 7764
#Unit 5. Developmental Biology
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.