Enzymes (Updated)

The video uses a Pac-Man analogy to explain enzymes, highlighting their role in speeding up reactions by binding substrates at their active sites. It discusses the enzyme lactase, which breaks down lactose, and the condition of lactose intolerance. Enzymes are catalysts that can be reused, and they often work with cofactors and coenzymes. The video also covers how enzymes have ideal conditions for activity, such as specific pH and temperature ranges, and how deviations can lead to denaturation, rendering them inactive.

What is the specific area on an enzyme where substrates bind called?

• Substrate pocket

• Enzyme core

• Active site

• Binding zone

How does the induced fit model describe enzyme activity?

• Enzymes and substrates repel each other

• Enzymes remain rigid during substrate binding

• Substrates change shape to fit the enzyme

• Enzymes change shape to better fit the substrate

Which enzyme is responsible for breaking down lactose?

• Lactase

• Lipase

• Amylase

• Protease

What is the role of cofactors and coenzymes in enzymatic reactions?

• They assist enzymes in building up or breaking down substrates

• They inhibit enzyme activity

• They are substrates for enzymes

• They replace enzymes in reactions

Which enzyme breaks down starch in the digestive system?

• Lactase

• Protease

• Lipase

• Amylase

What happens to an enzyme when it becomes denatured?

• It changes its substrate specificity

• It binds to more substrates

• It becomes more active

• Its shape becomes distorted and it can't bind to substrates

Why is it important for enzymes to have ideal pH and temperature conditions?

• To change their substrate

• To become inactive

• To maintain their shape and function

• To increase their size