Enzyme Regulation and Function Quiz
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Questions and Answers

What is the main function of enzyme regulators?

  • Alter the amount of enzyme (correct)
  • Activate fatty acids
  • Bind to the active site of enzymes
  • Contain niacin and act as hydrogen carriers

Which term refers to the small molecules that bind to the allosteric site of enzymes?

  • Concentration of enzyme
  • Simple pepsin
  • Covalent modification (correct)
  • Concentration of substrate

What is the main function of non-protein parts known as 'coenzymes'?

  • Inhibit enzymes between pH 5 to 9
  • Bind to the active site of enzymes
  • Contain pantothenic acid and act as hydrogen carriers (correct)
  • Activate fatty acids

What happens to enzyme activity if the concentration of inhibitors increases?

<p>It becomes inversely proportional (B)</p> Signup and view all the answers

At what temperature does most enzymes exhibit their optimum activity?

<p>45ºC (C)</p> Signup and view all the answers

What is the effect of increasing or decreasing the pH on enzyme activity?

<p>Most enzymes have an optimum pH, and deviation affects their activity (D)</p> Signup and view all the answers

What is the role of coenzyme A in enzymatic reactions?

<p>Activate fatty acids (D)</p> Signup and view all the answers

'Holoenzymes' consist of:

<p>'Apoenzymes' and 'coenzymes' (B)</p> Signup and view all the answers

'Allosteric regulation' involves:

<p>'Small molecules binding to allosteric sites' (A)</p> Signup and view all the answers

Which vitamin deficiency is characterized by easily bruised skin, capillary fragility, muscle fatigue, and decreased wound healing?

<p>Vitamin C (A)</p> Signup and view all the answers

What is the function of Vitamin B (Cobalamins)?

<p>Acts as a coenzyme in protein metabolism (C)</p> Signup and view all the answers

What is the main function of Vitamin E?

<p>Prevents peroxidation of polyunsaturated membrane fatty acids (A)</p> Signup and view all the answers

Which vitamin deficiency leads to defective blood clotting and hemorrhage?

<p>Vitamin K (D)</p> Signup and view all the answers

What is the function of Vitamin B1 (Thiamine)?

<p>Acts as a coenzyme in protein metabolism (D)</p> Signup and view all the answers

Which vitamin is a component of the visual pigments of the eye and is involved in the formation of healthy connective tissues, bones, and teeth?

<p>Vitamin A (C)</p> Signup and view all the answers

What are the clinical manifestations of a deficiency of Vitamin A?

<p>Night blindness and hyperkeratinization of the cornea (C)</p> Signup and view all the answers

Which vitamin functions primarily to regulate calcium and phosphorous homeostasis?

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

What is the main function of most vitamins mentioned in the passage?

<p>Serve as cofactors for enzymatic reactions (C)</p> Signup and view all the answers

Which vitamin has anti-oxidant activity, reducing the risk of cancers?

<p>Vitamin E (B)</p> Signup and view all the answers

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