TLS Online TPP Program

#Question id: 10223


when plastoquinone is accumulates in the reduced state, Reduced plastoquinone accumulates when PSII is being activated more frequently than PSI. What will happen when plastoquinone becomes more oxidized?

#Unit 6. System Physiology – Plant
  1. The kinase is deactivated and the level of phosphorylation of LHCII is decreased by the action of a membrane-bound phosphatase
  2. The kinase is activated and then phosphorylate a specific threonine residue on the surface of LHCII
  3. phosphorylation of LHCII is take place and the phosphorylated LHCII then migrates out of the stacked regions of the membrane into the unstacked regions
  4. kinase is deactivated dephophorylation takes place and LHCII moves back to the stroma lamellae away from photosystem II
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TLS Online TPP Program

#Question id: 652

#Unit 1. Molecules and their Interaction Relevant to Biology

Two proteins, X and Y, bind to the same ligand, A, with the binding curves shown below. Which of the statement is correct for the graph analysing two proteins?

TLS Online TPP Program

#Question id: 651

#Unit 1. Molecules and their Interaction Relevant to Biology

Consider an enzyme catalysed reaction treated with inhibitor. Enzyme kinetic was analysed with Eadie Hofstee equation. A plot of V0 versus V0/[S] for an enzyme-catalyzed reaction is shown below. The control curve was obtained in the absence of inhibitor. Which effect is shown on the enzyme activity when an inhibitor is added to the reaction mixture?

TLS Online TPP Program

#Question id: 650

#Unit 1. Molecules and their Interaction Relevant to Biology

On the basis of hypothetical binding curve given below, which of the following statement is INCORRECT

TLS Online TPP Program

#Question id: 649

#Unit 1. Molecules and their Interaction Relevant to Biology

Choose INCORRECT statement from the following

TLS Online TPP Program

#Question id: 648

#Unit 1. Molecules and their Interaction Relevant to Biology

Enzyme catalysis is regulated by a number of mechanisms. Also, the flux through metabolic pathways must be regulated. Given the metabolic pathway below, which choice accurately describes the regulation of compound G levels?

TLS Online TPP Program

#Question id: 647

#Unit 1. Molecules and their Interaction Relevant to Biology

For the hypothetical reversible reaction where S is converted to P, the rate constant for the forward reaction is 105 s-1 while that of the backward reaction is 101 s-1. If the reaction is catalyzed by an enzyme, the rate constant for the forward reaction increases 100-fold. What will be the equilibrium constant of the enzyme catalyzed reaction?