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Choose the correct combination...

Choose the correct combination

A

Trypsin - Class I - Cleavage of peptide bond

B

Succinic dehydrogenase - Fe as cofactor Malonic acid

C

Hexokinase - Class II - Rearrangement of atoms within a molecule

D

Nitrate reductase - MO as Cofactor - Removes `O_(2)` from substrate

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question of choosing the correct combination of enzymes and their functions, we will analyze each option provided in the question step by step. ### Step-by-Step Solution: 1. **Analyze the first option: Trypsin, Class 1, Cleavage of Peptide Bond** - Trypsin is a digestive enzyme that breaks down proteins in the small intestine. It is secreted by the pancreas. - Trypsin specifically cleaves peptide bonds, which means it does indeed perform cleavage of peptide bonds. - However, it is important to note that trypsin is classified as a Class 2 enzyme (hydrolases), not Class 1. Therefore, this option is incorrect. 2. **Analyze the second option: Succinic Dehydrogenase, FES, Cofactor of Malonic Acid** - Succinic dehydrogenase is involved in the citric acid cycle and catalyzes the oxidation of succinate to fumarate. - Malonate acts as a competitive inhibitor of succinic dehydrogenase, but it does not use a cofactor like iron (FES). - Thus, this option is also incorrect. 3. **Analyze the third option: Hexokinase, Class 2, Rearrangement of Atoms within a Molecule** - Hexokinase is an enzyme that phosphorylates glucose to form glucose-6-phosphate, which is a key step in glycolysis. - The function of hexokinase is not to rearrange atoms but to add a phosphate group to sugars (phosphorylation). - Hexokinase is classified as Class 2, but its primary function does not involve rearrangement of atoms. Therefore, this option is incorrect. 4. **Analyze the fourth option: Nitrate Reductase, Mod of Them as Cofactor Removes Oxygen from Substrate** - Nitrate reductase is an enzyme that catalyzes the reduction of nitrate (NO3-) to nitrite (NO2-), and it uses molybdenum as a cofactor. - This enzyme indeed removes oxygen from the substrate during the conversion process. - Therefore, this option is correct. ### Conclusion: Based on the analysis, the correct combination is: **Option 4: Nitrate Reductase using Molybdenum as a cofactor removes oxygen from the substrate.**
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