Understanding Enzymes: A Biological Catalyst

What are enzymes primarily composed of?

• Lipids

• Nucleic acids

• Carbohydrates

• Proteins

What is the primary function of enzymes in the body?

• To store energy

• To catalyze chemical reactions

• To transmit nerve impulses

• To provide structural support

What analogy is used to describe the interaction between an enzyme and its substrate?

• Zipper and fabric

• Lock and key

• Button and hole

• Screw and driver

What happens to an enzyme after it catalyzes a reaction?

• It becomes inactive

• It disintegrates

• It remains unchanged

• It is consumed

What is the effect of temperature on enzyme activity?

• No effect

• Decreases activity

• Always increases activity

• Increases then decreases

At what temperature is amylase most effective in breaking down starch?

• 60 degrees C

• 100 degrees C

• 37 degrees C

• 0 degrees C

What is the term used when an enzyme loses its function due to high temperature?

• Deactivation

• Denaturation

• Precipitation

• Coagulation

What happens to enzymes at their optimum temperature?

• They are most active

• They are least active

• They dissolve

• They become denatured

Which enzyme works well in acidic conditions in the stomach?

• Lipase

• Catalase

• Pepsin

• Amylase

What is the optimum pH for most enzymes?

• pH 10

• pH 14

• pH 7

• pH 1