Understanding Enzymes

What is the primary role of enzymes in biological systems?

• To speed up chemical reactions

• To provide structural support

• To slow down chemical reactions

• To store genetic information

Which type of enzyme is secreted outside the cell to perform its function?

• Lysosomal enzyme

• Mitochondrial enzyme

• Extracellular enzyme

• Intracellular enzyme

What is the role of lysosomes in enzyme activity within cells?

• They produce energy for enzyme activity

• They contain digestive enzymes for breaking down materials

• They transport enzymes out of the cell

• They store enzymes for later use

What is a key characteristic of enzymes that allows them to be used repeatedly?

• They are made of carbohydrates

• They are reusable

• They are single-use only

• They are made of lipids

How do enzymes interact with substrates?

• Enzymes have a specific shape that matches the substrate

• Enzymes dissolve substrates

• Enzymes change their shape to fit substrates

• Enzymes randomly bind to any substrate

What is the term used to describe enzymes that speed up reactions?

• Catalysts

• Inhibitors

• Products

• Reactants

What is the lock-and-key model in enzyme activity?

• Enzymes unlock substrates for reactions

• Enzymes can bind to any substrate

• Enzymes and substrates have specific shapes that fit together

• Enzymes change shape to fit substrates

What happens to an enzyme when it is denatured?

• It becomes more active

• Its shape changes, affecting its function

• It multiplies

• It becomes a different enzyme

How does temperature generally affect enzyme activity?

• Temperature has no effect on enzymes

• Higher temperatures always increase activity

• Lower temperatures denature enzymes

• Optimal temperatures maximize activity, while extreme temperatures can denature enzymes

What is the effect of pH on enzyme activity?

• Enzymes work best at any pH level

• Both high and low pH levels can denature enzymes

• Only high pH levels affect enzymes

• Enzymes are unaffected by pH changes