TLS Online TPP Program

#Question id: 1246


An SH2-containing protein contains a mutation that changes its binding pocket such that tyrosine and phosphotyrosine bind with equal affinity. As a result, MEK activity:

#Unit 4. Cell Communication and Cell Signaling
  1. decreases due to changes in Raf activation.

  2. decreases due to allosteric inhibition of SH2-domain binding.

  3. increases with ligand binding-induced dimerization.

  4. does not change with receptor dimerization and transautophosphorylation.

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TLS Online TPP Program

#Question id: 11484

#Unit 7. System Physiology – Animal

Two students studying physiology taste a known "bitter" substance, and both report sensing bitterness. They then sample another substance. Student A reports sensing both a bitter taste and a salty taste, but student B reports only a salty taste. What is the most logical explanation?

TLS Online TPP Program

#Question id: 11485

#Unit 7. System Physiology – Animal

In the odorant cells of mammals, specific odorants are detected by binding to _______

TLS Online TPP Program

#Question id: 11486

#Unit 7. System Physiology – Animal

The contraction of skeletal muscles is based on ________

TLS Online TPP Program

#Question id: 11487

#Unit 1. Molecules and their Interaction Relevant to Biology

Glycosidic bonds have Ф, Ψ and w angles due to

TLS Online TPP Program

#Question id: 11488

#Unit 1. Molecules and their Interaction Relevant to Biology

If approximately 415 kJ/mol of energy is being used to break a bond in a monosaccharide molecule then

A. That monosaccharide is undergoing conformational change

B. That monosaccharide is undergoing configurational change

C. That monosaccharide is undergoing mutarotation to change into other form

D. That monosaccharide is undergoing epimerisation to change into other form

Which of the above statements is/are correct for a molecule to change with an expense of that much of energy?

TLS Online TPP Program

#Question id: 11489

#Unit 1. Molecules and their Interaction Relevant to Biology

Why Trehalose does cannot get oxidized at its anomeric carbon