Food Bioprocessing and Enzymology Quiz

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10 Questions

What is the function of metabolism in a cell?

Breaking down molecules to obtain energy and using the energy to build new molecules

What is the role of enzymes in overcoming the energy barrier for reactions?

Lowering the activation energy barrier for reactions to occur at lower temperatures

What represents the difference in free energy between products and reactants in a reaction?

∆G

What happens to organic molecules at excessively high temperatures?

They denature

What do spontaneous reactions require to occur?

Free energy of activation (EA)

What is the role of enzymes in lowering the activation energy barrier for reactions?

Enzymes lower the activation energy barrier, allowing reactions to occur at lower temperatures.

What are the two main components of metabolism?

Metabolism consists of catabolism (breaking down molecules to get energy) and anabolism (using the energy to build up new molecules).

What is the function of the uphill portion of a reaction's energy profile?

The uphill portion represents the energy of activation (EA) required to start the reaction.

How can the energy of activation barrier be overcome aside from increasing temperature?

Enzymes can also overcome the energy of activation barrier, allowing reactions to occur at lower temperatures.

What is the difference in free energy between products and reactants in a reaction called?

The difference in free energy between products and reactants in a reaction is represented by ΔG.

Study Notes

Metabolism in a Cell

  • Metabolism is the process of transformation of energy and matter in a cell.

Enzymes in Overcoming Energy Barriers

  • Enzymes overcome the energy barrier for reactions by lowering the activation energy required for a reaction to occur.
  • Enzymes act as biological catalysts, increasing the rates of biochemical reactions without being consumed by the reaction.

Free Energy Difference

  • The difference in free energy between products and reactants in a reaction is represented by ΔG (delta G).

Effects of High Temperatures

  • At excessively high temperatures, organic molecules can denature or become damaged.

Spontaneous Reactions

  • Spontaneous reactions require a negative ΔG (delta G) to occur.
  • Spontaneous reactions release energy and are thermodynamically favorable.

Enzymes in Lowering Activation Energy

  • Enzymes lower the activation energy barrier for reactions, allowing the reaction to occur more efficiently.

Components of Metabolism

  • The two main components of metabolism are catabolism (breakdown of molecules) and anabolism (synthesis of molecules).

Uphill Portion of Energy Profile

  • The uphill portion of a reaction's energy profile represents the energy required to overcome the activation energy barrier.

Overcoming Energy Barriers

  • Aside from increasing temperature, the energy of activation barrier can be overcome by using enzymes or increasing the concentration of reactants.

Test your knowledge of food bioprocessing and enzymology with this quiz covering nomenclature and sources of food enzymes, applications in food production, extraction, purification, and immobilization of enzymes, and metabolism. See how well you understand the biochemical processes involved in food production and the role of enzymes in these processes.

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