Exploring Enzyme Function and Reaction Dynamics

Enzymes are crucial proteins that act as biological catalysts, speeding up reactions by lowering activation energy. They work with substrates in a lock and key mechanism, are reusable, and have specific conditions for optimal activity. Enzymes are used in various reactions, including digestion and photosynthesis, and have practical applications in industries like food and cleaning.

What is the primary role of enzymes in biological reactions?

• To be consumed in reactions

• To slow down reactions

• To act as biological catalysts

• To change the products of reactions

Which of the following is NOT a way enzymes can work?

• Changing one molecule into another

• Building up large molecules

• Breaking down large molecules

• Creating new molecules from scratch

How do enzymes and substrates interact according to the lock and key model?

• The enzyme and substrate repel each other

• The enzyme and substrate fit together perfectly

• The substrate changes shape to fit the enzyme

• The enzyme changes shape to fit the substrate

What happens to the enzyme after the reaction is complete?

• It becomes inactive

• It is consumed in the reaction

• It changes into a different enzyme

• It is released and can be reused

Which enzyme breaks down proteins into amino acids?

• Lipase

• Carbohydrase

• Protease

• Catalase

What is the effect of increasing temperature on enzyme activity up to a certain point?

• Decreases the rate of reaction

• Denatures the enzyme immediately

• Increases the rate of reaction

• Has no effect on the rate of reaction

What happens to enzyme activity if there is too little substrate?

• The enzyme becomes inactive

• The rate of reaction slows

• The rate of reaction increases

• The enzyme changes shape

Why is it important to remove the product in enzyme-catalyzed reactions?

• To denature the enzyme

• To decrease the rate of reaction

• To increase the rate of reaction

• To change the enzyme's shape

Which enzyme is used in biological washing powders to remove proteins and fats?

• Catalase

• Pectinase

• Lipase

• Amylase

What is the role of pectinase in the food industry?

• To break down proteins

• To break down fats

• To break down cells in fruit to release more juice

• To break down carbohydrates