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

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

<p>Heme (B)</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) (A)</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 (D)</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) (A)</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 (C)</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) (A)</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 (C)</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) (A)</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 (C)</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) (B)</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 (B)</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. (A)</p> Signup and view all the answers

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

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

Which of the following is a characteristic of coenzymes?

<p>They participate in multiple catalytic cycles. (C)</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. (B)</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 (A)</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 (D)</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 (B)</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 (C)</p> Signup and view all the answers

Which of the following is an example of a coenzyme?

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

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

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

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