Enzymes and Biochemical Reactions

The lecture discusses enzymes, biochemical catalysts in the body, and their role in speeding up reactions by lowering activation energy. It explains the transition state of reactions and compares catalysts in lab conditions to those in the body. Enzymes provide a stable environment for reactions, orient reactants, and offer alternative pathways. Glycolysis is highlighted as an example, showing how enzymes like pyruvate kinase are crucial for energy production.

What are enzymes primarily known as?

• Biochemical catalysts

• Chemical inhibitors

• Energy sources

• Structural proteins

What does the transition state of a chemical reaction represent?

• The initial reactant

• The final product

• The lowest energy point

• The rate of the reaction

In an energy diagram, what does a higher energy level of reactants compared to products indicate?

• A spontaneous reaction

• An exothermic reaction

• An endothermic reaction

• A reversible reaction

How can scientists speed up reactions in lab conditions?

• By decreasing pressure

• By reducing the volume

• By adding water

• By increasing temperature or adding a catalyst

Why can't the human body simply increase temperature to speed up reactions?

• It would disrupt stable and constant environments

• It would require too much energy

• It would slow down the reactions

• It would increase the activation energy

What is the primary role of enzymes in biochemical reactions?

• To act as a reactant

• To stabilize the transition state

• To provide energy

• To increase the temperature

What is glycolysis?

• The process of protein synthesis

• The formation of lipids

• The breakdown of glucose to produce energy

• The replication of DNA

Which enzyme is involved in the last step of glycolysis?

• Protease

• Pyruvate kinase

• Amylase

• Lipase

What is the end product of glycolysis that can be further broken down in mitochondria?

• Pyruvic molecules

• Amino acids

• Glycogen

• Glucose

Why are enzymes essential for life?

• They provide structural support

• They speed up reaction rates necessary for energy production

• They transport oxygen

• They store genetic information