#Question id: 1065
#Unit 4. Cell Communication and Cell Signaling
Resistance of some animals to certain viral diseases is based on
#Question id: 12317
#Unit 10. Ecological Principles
#Question id: 6947
#Unit 5. Developmental Biology
What is the correct dorso-ventral arrangement seen in a cross-section of Drosophila embryo?
#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.
#Question id: 10520
#Unit 6. System Physiology – Plant
Which one of the following fungus causes infected rice shoots to grow much faster relative to uninfected plants and responsible for the “foolish seedling disease” of rice?