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TLS Online TPP Program

#Question id: 11378

Which of the following set of conditions will qualify a species to be considered as critical endangered (EN) as per IUCN criteria?

#Unit 10. Ecological Principles

  1. >90% reduction in population size, <100 km2 area of occupancy, at least 50% estimated extinction risk in three generations.

  2. <2,50 individuals with declining population, <250 mature individuals, at least 20% estimated extinction risk in 20 years

  3. <250 individuals with declining population, <50 mature individuals, at least 50% estimated extinction risk in 10 years.
  4. >90% reduction in population size, <10 km² area of occupancy, at least 50% estimated extinction risk in five generations
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TLS Online TPP Program

#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.
TLS Online TPP Program

#Question id: 9583

#Unit 6. System Physiology – Plant

 A mechanism known as the Q cycle accounts for most of the observations in which structure and reactions of plastoquinone that operate in,
TLS Online TPP Program

#Question id: 10366

#Unit 6. System Physiology – Plant

Cyanobacteria can fixes nitrogen in an anaerobic conditions. Which of the following statements about heterocyst which is specialized cell of blue-green algae is incorrect?
TLS Online TPP Program

#Question id: 23648

#General Aptitude

If the following series of numbers is written in the reverse order, which number will be the seventh to the right of the fourth number from the left? 1, 8,
3, 9, 7, 4, 10, 6, 2, 11, 13, 5, 14, 16
TLS Online TPP Program

#Question id: 19918

#Unit 13. Methods in Biology

Affinity constant (Ka) in between the antigen-antibody interaction can be analysed by which method?