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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?

#Unit 1. Molecules and their Interaction Relevant to Biology

  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: 13217

#Unit 6. System Physiology – Plant

Hypodermis or Exodermis that contain
TLS Online TPP Program

#Question id: 6991

#Unit 5. Developmental Biology

Metamorphosis of amphibians is triggered by environmental cues that act on the:
TLS Online TPP Program

#Question id: 11058

#Unit 10. Ecological Principles

The pufferfish, a common marine fish, has extensive spines that extend outward when it swallows water, becoming several times its normal size. This is an example of what kind of defense against predation?
TLS Online TPP Program

#Question id: 545

#Unit 1. Molecules and their Interaction Relevant to Biology

Which one of the following is not among the six internationally accepted classes of enzymes?
TLS Online TPP Program

#Question id: 11703

#Unit 7. System Physiology – Animal

A female athlete who took testosterone-like steroids for several months stopped having normal menstrual cycles. What is the best explanation for this observation?