TLS Online TPP Program

#Question id: 1737


The carrier T-cell epitope on a thymus-dependent antigen:

#I Life Science/ Life Sciences Group – I-V
  1. Behaves like a hapten

  2. Needs to be polymeric

  3. Need not be physically connected to the B-cell epitope

  4. Stimulates help for the B-cell response

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TLS Online TPP Program

#Question id: 27775

#Research Methodology

________ is data-based, coming up with conclusions that are capable of being verified, by observation or b experiment.

TLS Online TPP Program

#Question id: 10283

#I Life Science/ Life Sciences Group – I-V

How to Phosphofructokinase-1 (PFK-1) and Fructose 1,6-Bisphosphatase are reciprocally regulated ?

a) ATP inhibits PFK-1 by binding to an allosteric site and lowering the affinity of the enzyme for its substrate fructose 6-phosphate

b) citrate is also an allosteric regulator of PFK-1, high citrate concentration increases the inhibitory effect of ATP

c) FBPase-1, is strongly inhibited (allosterically) by AMP; when the cell’s supply of ATP is low (corresponding to high AMP), the ATP-requiring synthesis of glucose slows

d) AMP inhibits PFK-1 by binding to an allosteric site and lowering the affinity of the enzyme for its substrate fructose 6-phosphate

Which of the following statements of regulation of enzyme is correct?

TLS Online TPP Program

#Question id: 4565

#I Life Science/ Life Sciences Group – I-V

Darwinʹs mechanism of natural selection required long time spans in order to modify species. From whom did Darwin get the concept of Earthʹs ancient age?

TLS Online TPP Program

#Question id: 15494

#SCPH05 I Biotechnology

Assuming that cells convert two-thirds (w/w) of the substrate to biomass, the stoichiometric coefficient (1 only) for glucose utilisation for the following reaction is

TLS Online TPP Program

#Question id: 2286

#I Life Science/ Life Sciences Group – I-V

Bacterial flagella propel the cell by using