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TLS Online TPP Program

#Question id: 679

b sandwich forms when

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. two hydrophobic sides of b-sheets interact.

  2. two hydrophilic sides of b-sheets interact.

  3. an a-helix separates two b-sheets.

  4. two amphipathic a-helices interact.

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TLS Online TPP Program

#Question id: 30103

#Unit 1. Molecules and their Interaction Relevant to Biology

Direct sources of purine ring atoms in the de novo synthesis of IMP include:
1. glutamine.
2. a component of the tetrahydrofolate one-carbon pool.
3. aspartate.
4. glycine.
TLS Online TPP Program

#Question id: 1416

#Unit 4. Cell Communication and Cell Signaling

Which of the following forms a dimer that gets displaced from the surface of the mitochondria by EGL-1?
TLS Online TPP Program

#Question id: 13183

#Unit 10. Ecological Principles

The MacArthur-Wilson equilibrium model of island biogeography predicts the number of species found on islands. The figure below depicts two volcanic islands located off a section of mainland coast.


According to the MacArthur-Wilson model, how would the number of bird species change from the time of an island's formation (assuming it remains constant in size and isolation)?
TLS Online TPP Program

#Question id: 18861

#Unit 13. Methods in Biology

Which component of the compound microscope aids in the collecting and focussing of light rays on the material to be examined?
TLS Online TPP Program

#Question id: 18009

#Unit 7. System Physiology – Animal

Fleeing from or confronting a threat is known as ______.