The Role of Enzymes in Biological Reactions

The video introduces enzymes using a Pac-Man analogy, explaining their specific shape and function. Enzymes are proteins that speed up reactions by fitting perfectly with substrates. Factors like temperature and pH can denature enzymes, affecting their function. A real-world example of lactose intolerance illustrates the importance of enzymes, where the absence of lactase prevents lactose breakdown, causing discomfort.

What childhood game does the teacher compare enzymes to?

• Space Invaders

• Tetris

• Pac-Man

• Super Mario

What is the term for the specific shape that enzymes fit into?

• Inhibitor

• Receptor

• Substrate

• Catalyst

What are enzymes primarily made of?

• Nucleic acids

• Proteins

• Lipids

• Carbohydrates

How do enzymes affect chemical reactions?

• They have no effect on reactions.

• They stop reactions.

• They slow down reactions.

• They speed up reactions.

Which of the following is NOT a factor that affects enzyme activity?

• Temperature

• pH

• Light

• Substrate concentration

What happens to an enzyme when it is denatured?

• It becomes more active.

• Its shape changes and it can't bind to substrates.

• It multiplies.

• It becomes a different enzyme.

What is the sugar found in milk that lactose intolerant people cannot digest?

• Lactose

• Fructose

• Glucose

• Sucrose

What enzyme is missing in people who are lactose intolerant?

• Protease

• Lipase

• Amylase

• Lactase

What suffix is commonly found at the end of enzyme names?

• -ate

• -ine

• -ase

• -ose

Why do lactose intolerant individuals avoid milk?

• They dislike the taste.

• They prefer plant-based milk.

• They cannot digest lactose, leading to discomfort.

• They are allergic to milk proteins.