Exploring the World of Enzymes

The video explains how enzymes, which are proteins, speed up chemical reactions necessary for digestion and other bodily functions. It highlights the role of enzymes like pepsin and amalay in breaking down food substances. The video also discusses the characteristics of enzymes, including their active sites, specificity, and ability to be recycled, ensuring efficient metabolic processes.

What is the primary role of stomach acid in digestion?

• To absorb nutrients

• To create a suitable environment for enzymes

• To break down proteins directly

• To dissolve metals

What are enzymes primarily made of?

• Proteins

• Lipids

• Carbohydrates

• Nucleic acids

Which enzyme is found in the stomach and helps digest proteins?

• Amylase

• Lipase

• Pepsin

• Lactase

What is the function of amylase in the mouth?

• Breaks down fats

• Breaks down nucleic acids

• Breaks down proteins

• Breaks down starch

What is the active site of an enzyme?

• The part that binds to substrates

• The part that transports molecules

• The part that signals other cells

• The part that stores energy

What happens to starch in the digestive process?

• It is excreted unchanged

• It is converted into proteins

• It is broken down into glucose

• It is stored as fat

Why is enzyme specificity important?

• To avoid harmful reactions in the body

• To prevent enzymes from being deactivated

• To ensure enzymes can act on multiple types of molecules

• To increase the speed of all reactions

Which enzyme breaks down fats?

• Lactase

• Pepsin

• Amylase

• Lipase

What happens to enzymes after they catalyze a reaction?

• They are consumed

• They are altered

• They are excreted

• They are recycled

Why is only a small amount of enzyme needed to speed up thousands of reactions?

• Because they are consumed in the process

• Because they are altered by the reactions

• Because they can be reused

• Because they are very large molecules