A 75-year-old man goes to the hospital emergency department and faints. Five minutes later he is alert. An EKG shows 75 P waves per minute and 35 QRS waves per minute with a normal QRS width. Which of the following is the likely diagnosis?

#Question id: 7764

#I Life Science/ Life Sciences Group – I-V

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: 2937

#SCPH05 I Biotechnology

Separase initiates sister chromatid segregation at anaphase by cleaving:

#Question id: 10338

#I Life Science/ Life Sciences Group – I-V

Nitrate from the soil solution actively absorb by Plant roots via several low- and high-affinity transporters known as

#Question id: 3645

#SCPH05 I Biotechnology

The single-stranded bubble created in DNA replication is coated with _____________ to protect it from breakage and to prevent the DNA renaturing.

#Question id: 4170

#SCPH05 I Biotechnology

 Shifting of the reading frame by one nucleotide results in __.