TLS Online TPP Program

#Question id: 1506


An oncogene codes for a growth factor receptor that is constitutively active. Of the following statements about a culture of cells expressing this gene, which would you expect to be true?

#Unit 4. Cell Communication and Cell Signaling
  1. The cells would be stimulated to divide by addition of growth factors to the medium.

  2. Cells in the culture would have no response to the addition of growth factors.

  3. Cells in the culture would be arrested in the Go phase of the cell cycle.

  4. None of the above.

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TLS Online TPP Program

#Question id: 3342

#Unit 11. Evolution and Behavior

Neutral alleles are those that do not alter fitness and average reproductive success does not differ between individuals that carry one neutral allele or the other. The frequencies of these neutral alleles may change in a population by

TLS Online TPP Program

#Question id: 414

#Unit 1. Molecules and their Interaction Relevant to Biology

The hydrolysis of phosphoenolpyruvate proceeds with a DG'° of about –62 kJ/mol. The greatest contributing factors to this reaction are the destabilization of the reactants by electostatic repulsion and stabilization of the product pyruvate by:

TLS Online TPP Program

#Question id: 5813

#Unit 8. Inheritance Biology

Examples of environmental mutagens include:

TLS Online TPP Program

#Question id: 3922

#Unit 3. Fundamental Processes

The σ70 subunit in E. coli RNA polymerase acts as a/an __.

TLS Online TPP Program

#Question id: 894

#Unit 1. Molecules and their Interaction Relevant to Biology

When stress conditions arise, or when protein synthesis threatens to overwhelm the protein-folding capacity of the ER, unfolded proteins can accumulate. These conditions trigger the unfolded protein response (UPR)

a) unfolded protein response ensures to reduces the rate of protein synthesis by mTOR pathway

b) Amyloid aggregates that form before the UPR can come into play may be removed. Some are degraded by autophagy

c) Amyloid aggregates that can be removed by other mechanism such as lysosomal degradations

d)  UPR also bring the various systems into alignment by increasing the concentration of chaperones in the oxygen deprived conditions

Which of the following statements would be incorrect?