TLS Online TPP Program

#Question id: 72


For the reaction catalyzed by the enzyme hexokinase: Glucose + ATP → glucose 6-phosphate + ADP the equilibrium constant, Keq, is 7.8 × 102. In living E. coli cells, [ATP] = 5 mM, [ADP] = 0.5 mM, [glucose] = 2 mM, and [glucose 6-phosphate] = 1 mM. Which of the following conclusions made on the basis of the above calculations is incorrect?

#Biochemistry
  1. The reaction is therefore far from equilibrium.

  2. The cellular concentrations of the products are much lower and those of the reactants are much higher.

  3. The reaction therefore tends strongly to go to the right.

  4. The cellular concentrations of the products are much higher and those of the reactants are much lower.

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TLS Online TPP Program

#Question id: 38776

#Plant Biotechnology

Q. Statement I: Calcium chloride is added to the osmoticum during protoplast isolation.
Statement II: Calcium ions improve plasma membrane stability of protoplasts.

TLS Online TPP Program

#Question id: 38777

#Plant Biotechnology

Q. Statement I: B5 and MS media are commonly used for culturing isolated protoplasts.
Statement II: These media provide essential macro- and micronutrients required for protoplast survival and division.

TLS Online TPP Program

#Question id: 38778

#Plant Biotechnology

Q. Statement I: Mannitol and sorbitol are preferred osmotic stabilizers during protoplast isolation.
Statement II: These compounds are metabolized rapidly by protoplasts to generate energy.

TLS Online TPP Program

#Question id: 38779

#Plant Biotechnology

Q. Assertion (A): Vegetatively propagated crops are more prone to rapid spread of viral diseases.
Reason (R): Vegetative propagules directly transmit virus particles from the infected parent plant.
Choose the correct option:

TLS Online TPP Program

#Question id: 38780

#Plant Biotechnology

Q. Statement I: Sexual reproduction generally limits virus transmission in plants.
Statement II: Many plant viruses are now known to be seed-transmissible.
Choose the correct option

TLS Online TPP Program

#Question id: 38781

#Plant Biotechnology

Q. Assertion (A): Shoot apical meristems are preferred explants for eliminating plant viruses.
Reason (R): Viruses are unable to replicate efficiently in rapidly dividing meristematic cells.
Choose the correct option: