Enzymes and Factors Influencing Activity Quiz

What is the primary function of enzymes in biological systems?

• To slow down biochemical reactions

• To provide structural support to cells

• To catalyze biochemical reactions and speed up their rate.

• To transport nutrients within the body

Which of the following is NOT a characteristic of enzyme structure?

• Enzymes are proteins

• Enzymes have a specific 3D shape

• Enzymes are not affected by temperature or pH

• All of the above

How do enzymes regulate their activity?

• Through changes in temperature and pH levels

• Through various mechanisms such as allosteric regulation, competitive and non-competitive inhibition, and post-translational modifications.

• Through changes in DNA sequence

• Through changes in cell membrane structure

What is the effect of temperature on enzyme activity?

• Temperature can either increase or decrease enzyme activity depending on whether it is within the enzyme's optimal temperature range.

• Temperature has no effect on enzyme activity

• Enzyme activity always increases with increasing temperature

• Enzyme activity always decreases with increasing temperature

What is the effect of pH on enzyme activity?

• pH can either enhance or inhibit enzyme activity.

• Enzyme activity is always inhibited by pH.

• pH has no effect on enzyme activity.

• Enzyme activity is always enhanced by pH.

What is enzyme inhibition?

• The activity of an enzyme is reduced or blocked by a molecule binding to it.

• Enzyme inhibition is the process of converting enzymes into different types of proteins.

• Enzyme inhibition is the process of breaking down enzymes into smaller molecules.

• Enzyme inhibition is the process of increasing the activity of an enzyme by binding a molecule to it.

Which of the following is an example of competitive inhibition?

• Option D

• Option B

• Option A

• Option C

Which of the following is an example of non-competitive inhibition?

• Binding of a competitive inhibitor to an enzyme

• Binding of a substrate to an enzyme

• Binding of a coenzyme to an enzyme

• Binding of an allosteric inhibitor to an enzyme

What is the difference between reversible and irreversible enzyme inhibition?

• The difference between reversible and irreversible enzyme inhibition is the duration of inhibition.

• The difference between reversible and irreversible enzyme inhibition is the type of enzyme involved.

• The difference between reversible and irreversible enzyme inhibition is the concentration of the inhibitor.

• The difference between reversible and irreversible enzyme inhibition is the ability to remove the inhibitor from the enzyme.

Which of the following is NOT a factor influencing enzyme activity?

• Temperature

• substrate concentration

• enzyme concentration

• pH