Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 55478
TLS Online TPP Program

#Question id: 15524

The bulk of DP thymocyte death (~95%) occurs among thymocytes that fail positive selection because 

#Unit 4. Cell Communication and Cell Signaling
  1. Their receptors specifically recognize self-MHC molecules with intermediate affinity
  2. Their receptors specifically recognize self-MHC molecules
  3. These cells receive survival signals through their TCRs, and die by a process known as death by neglect.
  4. Their receptors do not specifically recognize self-MHC molecules
More Questions
TLS Online TPP Program

#Question id: 703

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following statements concerning protein domains is true?
TLS Online TPP Program

#Question id: 5209

#Unit 11. Evolution and Behavior

If humans have 2,900 Mb, a specific member of the lily family has 120,000 Mb, and a yeast has ~13 Mb, why canʹt this data allow us to order their evolutionary significance
TLS Online TPP Program

#Question id: 16124

#Unit 7. System Physiology – Animal

Thermoreceptors are:
a) activated only by severe cold or severe hot
b) located on the superficial layers of the skin
c) a subtype of nociceptors
d) on dendritic endings of A delta fibres and C fibres
which of following combination is correct?
TLS Online TPP Program

#Question id: 23164

#Unit 13. Methods in Biology

Out of the given below alexa dyes which one will emit in Blue light range?
TLS Online TPP Program

#Question id: 12755

#Unit 10. Ecological Principles

Which of the following statements best describes why biologists are currently concerned with global warming and the thawing of permafrost in many areas of the tundra biome?