Bio Lab

What is the primary function of enzymes in biological systems?

• To store energy

• To catalyze biochemical reactions

• To transport molecules

• To provide structural support

What is the "active site" of an enzyme?

• The region where the enzyme binds to coenzymes

• The region that provides the structural integrity of the enzyme

• The site where substrates bind and undergo a chemical reaction

• The area responsible for the enzyme's pH stability

Which of the following factors can influence the activity of an enzyme:

• Temperature

• pH

• Substrate concentration

• All of the above

What happens to an enzyme after it has catalyzed a reaction?

• It is consumed in the reaction

• It is denatured and loses activity
  

• It is unchanged and can be reused

• It undergoes irreversible structural changes

Which of the following is an example of an enzyme?

• DNA

• Amylase

• Glucose

• Hemoglobin

How does enzyme concentration affect the rate of a biochemical reaction?

• It decreases the reaction rate

• Increasing enzyme concentration generally increases the reaction rate

• It only affects the reaction rate at high temperatures

• It has no effect on the reaction rate

What is the term for a substance that inhibits enzyme activity?

• Substrate

• Activator

• Inhibitor

• Coenzyme

What happens to an enzyme when the temperature increases beyond its optimal range?

• The enzyme becomes more efficient

• The enzyme becomes denatured

• The enzyme's active site changes shape, increasing activity

• The enzyme's affinity for its substrate increases

What is the effect of pH on enzyme activity?

• Enzymes have the same optimal pH for all reactions

• pH changes can affect the enzyme's structure and activity

• pH does not affect enzyme activity

• Enzymes work best at pH 7, regardless of their environment

Which of the following is true about enzyme denaturation

• Denaturation causes enzymes to become more active

• Denaturation is irreversible and leads to loss of function

• Denaturation makes enzymes more flexible

• Denaturation results in enzymes becoming more specific for their substrate