Enzyme Biology: Substrate and Enzyme Concentration
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Questions and Answers

What happens to the reaction rate when the concentration of enzymes is increased beyond the maximum level?

  • The reaction rate remains constant (correct)
  • The reaction rate becomes zero
  • The reaction rate decreases
  • The reaction rate increases further

What is the effect of increasing temperature on the reaction rate of an amylase enzyme?

  • It has no effect on the reaction rate
  • It increases the reaction rate at all temperatures
  • It increases the reaction rate up to an optimum temperature and then decreases (correct)
  • It always decreases the reaction rate

What is the state of the active sites of enzymes at the maximum reaction rate?

  • Some active sites are saturated with substrate
  • Only one active site is saturated with substrate
  • No active sites are saturated with substrate
  • All active sites are saturated with substrate (correct)

What happens to an enzyme when the temperature exceeds the optimum temperature?

<p>It becomes less active (C)</p> Signup and view all the answers

What is the purpose of the experiment described in the problem statement?

<p>To study the effect of temperature on enzyme activity (D)</p> Signup and view all the answers

What happens to the rate of enzyme reaction when the concentration of enzymes is doubled?

<p>The rate of reaction is doubled (A)</p> Signup and view all the answers

What is the limiting factor at the maximum rate of reaction?

<p>Substrate concentration (D)</p> Signup and view all the answers

What happens to the rate of reaction when the concentration of substrate is increased?

<p>The rate of reaction increases (C)</p> Signup and view all the answers

What is the effect of adding more substrate to a reaction at the maximum rate?

<p>The rate of reaction increases (C)</p> Signup and view all the answers

What is denaturation of an enzyme?

<p>A change in the structure of the enzyme (A)</p> Signup and view all the answers

What happens to the rate of reaction when the active sites of the enzyme are fully occupied?

<p>The rate of reaction reaches a maximum (D)</p> Signup and view all the answers

What is the effect of an increase in temperature on the rate of biochemical reactions controlled by enzymes?

<p>The rate of reaction doubles with every 10°C rise in temperature (A)</p> Signup and view all the answers

What happens to enzymes when the temperature reaches 60°C?

<p>The enzymes become denatured (B)</p> Signup and view all the answers

What is the optimal temperature for enzyme reactions in the human body?

<p>37°C (D)</p> Signup and view all the answers

What happens to the active site of enzymes when they become denatured?

<p>It changes and does not complement the substrate (D)</p> Signup and view all the answers

What affects the rate of biochemical reactions controlled by enzymes, apart from temperature?

<p>Enzyme concentration and substrate concentration (A)</p> Signup and view all the answers

What is the effect of reaching the optimal temperature on the enzyme reaction rate?

<p>The rate is at its maximum (B)</p> Signup and view all the answers

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