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TLS Online TPP Program

#Question id: 887

Polypeptides fold rapidly by a stepwise process, how does the polypeptide chain arrive at its native conformation?

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. proteins appear to fold in a hierarchical manner, with small local elements of structure forming and then to yield larger elements, which coalesce with other such elements to form yet larger elements and converted into its native conformation

  2. A protein-folding pathway has been highly successful in predicting the three-dimensional structure of small proteins from their amino acid sequence atleast 156 amino acid residue that have acquired their final structure

  3. Vander waal interaction play a significant role throughout the process, as the aggregation of nonpolar amino acid side chains provides an entropic stabilization to intermediates and, eventually, to the final folded structure

  4. The native conformation of the protein folding by stepwise manner such as unfolded→transition state→molten globule→folded conformation by decreasing the free energy

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TLS Online TPP Program

#Question id: 19084

#Unit 6. System Physiology – Plant

ToxA is produced by__
a) Cochliobolus carbonum
b) Stagonospora nodorum
c) Pyrenophora tritici‐repentis
d) fungus Botrytis
Which combination is correct?
TLS Online TPP Program

#Question id: 22023

#Unit 1. Molecules and their Interaction Relevant to Biology

Choose the correct equation for Haldane reversible reaction
TLS Online TPP Program

#Question id: 447

#Unit 1. Molecules and their Interaction Relevant to Biology

In glycolysis, fructose 1,6-bisphosphate is converted to two products with a standard free-energy change (DG'°) of 23.8 kJ/mol.  Under what conditions encountered in a normal cell will the free-energy change (DG) be negative, enabling the reaction to proceed spontaneously to the right?
TLS Online TPP Program

#Question id: 11682

#Unit 7. System Physiology – Animal

A young woman is given daily injections of a substance beginning on the 16th day of her normal menstrual cycle and continuing for 3 weeks. As long as the injections continue, she does not menstruate. The injected substance could be which of the following?
TLS Online TPP Program

#Question id: 18981

#Unit 13. Methods in Biology

The pL promoter is controlled by the cl repressor protein of bacteriophage A. In practice, a temperature-sensitive mutant of the cl repressor, cl857, is generally used to regulate pL-directed transcription. Cells carrying the temperature-sensitive cl repressor are first grown at 30°C, and 42°C