Vitamins & minerals examples in enzymes
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Questions and Answers

Which vitamin is a component of thiamine pyrophosphate (TPP), a coenzyme involved in the breakdown of glucose?

  • Vitamin B2 (Riboflavin)
  • Vitamin B3 (Niacin)
  • Vitamin B5 (Pantothenic Acid)
  • Vitamin B1 (Thiamine) (correct)

    • Which mineral serves as a cofactor for enzymes involved in DNA replication, protein synthesis, and immune system function?

  • Calcium
  • Magnesium
  • Zinc (correct)
  • Iron

    • Which vitamin is a precursor for the formation of pyridoxal phosphate (PLP), a coenzyme involved in amino acid metabolism and various enzymatic reactions?

  • Vitamin B2 (Riboflavin)
  • Vitamin B6 (Pyridoxine) (correct)
  • Vitamin B1 (Thiamine)
  • Vitamin B3 (Niacin)

    • Which of the following is a key difference between coenzymes and prosthetic groups?

    <p>Coenzymes are derived from vitamins, while prosthetic groups are not</p> Signup and view all the answers

    Which of the following statements about coenzymes is true?

    <p>Coenzymes can be directly involved in the catalytic mechanism of the enzyme</p> Signup and view all the answers

    Which of the following is a characteristic of prosthetic groups?

    <p>Prosthetic groups are not involved in the catalytic mechanism of the enzyme</p> Signup and view all the answers

    Which of the following is an example of a prosthetic group?

    <p>Heme</p> Signup and view all the answers

    Which vitamin is essential for the synthesis of nicotinamide adenine dinucleotide (NAD+) and nicotinamide adenine dinucleotide phosphate (NADP+), coenzymes involved in redox reactions and energy metabolism?

    <p>Vitamin B3 (Niacin)</p> Signup and view all the answers

    Which mineral serves as a cofactor for enzymes involved in phosphorylation reactions, including those related to ATP metabolism and nucleic acid synthesis?

    <p>Magnesium</p> Signup and view all the answers

    Which vitamin is a precursor for the formation of flavin mononucleotide (FMN) and flavin adenine dinucleotide (FAD), coenzymes that participate in redox reactions?

    <p>Vitamin B2 (Riboflavin)</p> Signup and view all the answers

    Which mineral is essential for the function of enzymes involved in oxygen transport (hemoglobin and myoglobin) and in electron transport chains (cytochromes)?

    <p>Iron</p> Signup and view all the answers

    Which vitamin is a component of coenzyme A (CoA), which plays a central role in various metabolic pathways, including fatty acid synthesis and the citric acid cycle?

    <p>Vitamin B5 (Pantothenic Acid)</p> Signup and view all the answers

    Which mineral serves as cofactors for various enzymes involved in DNA replication, protein synthesis, and immune system function?

    <p>Zinc</p> Signup and view all the answers

    Which vitamin is a precursor for the formation of pyridoxal phosphate (PLP), a coenzyme involved in amino acid metabolism and various enzymatic reactions?

    <p>Vitamin B6 (Pyridoxine)</p> Signup and view all the answers

    Which mineral is essential for the function of enzymes involved in phosphorylation reactions, including those related to ATP metabolism and nucleic acid synthesis?

    <p>Magnesium</p> Signup and view all the answers

    Which vitamin is a component of thiamine pyrophosphate (TPP), a coenzyme involved in the breakdown of glucose?

    <p>Vitamin B1 (Thiamine)</p> Signup and view all the answers

    Which mineral serves as a cofactor for enzymes involved in DNA replication, protein synthesis, and immune system function?

    <p>Zinc</p> Signup and view all the answers

    Which of the following is a key difference between coenzymes and prosthetic groups?

    <p>Coenzymes are reusable and can participate in multiple enzyme-catalyzed reactions, while prosthetic groups are specific to the enzyme they are bound to.</p> Signup and view all the answers

    Which of the following is an example of a prosthetic group?

    <p>Heme</p> Signup and view all the answers

    Which of the following is a characteristic of coenzymes?

    <p>They participate in multiple catalytic cycles.</p> Signup and view all the answers

    Which of the following is a characteristic of prosthetic groups?

    <p>They play structural and functional roles in the enzyme's active site.</p> Signup and view all the answers

    Which of the following vitamins is a precursor for the formation of pyridoxal phosphate (PLP), a coenzyme involved in amino acid metabolism and various enzymatic reactions?

    <p>Vitamin B6</p> Signup and view all the answers

    Which of the following vitamins is a component of thiamine pyrophosphate (TPP), a coenzyme involved in the breakdown of glucose?

    <p>Vitamin B1</p> Signup and view all the answers

    Which mineral serves as a cofactor for enzymes like cytochrome c oxidase, which is involved in the final step of the electron transport chain in mitochondria?

    <p>Copper</p> Signup and view all the answers

    Which mineral is a component of the amino acid selenocysteine, which is found in selenoproteins and serves as a cofactor for various enzymes with antioxidant and redox functions?

    <p>Selenium</p> Signup and view all the answers

    Which of the following is an example of a coenzyme?

    <p>NAD+</p> Signup and view all the answers

    Which of the following is an example of a prosthetic group?

    <p>CoA</p> Signup and view all the answers

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