TLS Online TPP Program

#Question id: 2020


Which statement best describes the difference in responses of effector B cells (plasma cells) and cytotoxic T cells?

#Unit 4. Cell Communication and Cell Signaling
  1. B cells confer active immunity; cytotoxic T cells confer passive immunity.

  2. B cells kill viruses directly; cytotoxic T cells kill virus-infected cells.

  3. B cells secrete antibodies against a virus; cytotoxic T cells kill virus-infected cells.

  4. B cells accomplish the cell-mediated response; cytotoxic T cells accomplish the humoral response.

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TLS Online TPP Program

#Question id: 648

#Unit 1. Structure and Function of Biomolecules

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: 649

#Unit 1. Structure and Function of Biomolecules

Choose INCORRECT statement from the following

TLS Online TPP Program

#Question id: 650

#Unit 1. Structure and Function of Biomolecules

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

TLS Online TPP Program

#Question id: 651

#Unit 1. Structure and Function of Biomolecules

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: 652

#Unit 1. Structure and Function of Biomolecules

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: 653

#Unit 1. Structure and Function of Biomolecules

For the enzyme-catalyzed reaction S ~ P, Keq = 5, which of the following curves best represents the change in [S] that occurs with time when S is added to a solution containing the appropriate enzyme?