Question
Match the entries inGroup I with the enzymes inGroup II.Group I Group II P. NAD$^+$ 1. Glutathione peroxidase Q. Selenium 2. Nitrogenase R. Pyridoxal phosphate 3. Lactate dehydrogenase S. Molybdenum 4. Glycogen phosphorylase
The correct answer is
P-3, Q-1, R-4, S-2
Enzyme Matching: Group I and Group II
This question requires matching biochemical components and elements from Group I with their associated enzymes from Group II.
Key Enzyme Matches
The correct pairings are established based on biochemical functions:
- P. NAD$^+$: Nicotinamide adenine dinucleotide ($NAD^+$) functions as a crucial coenzyme in redox reactions. It is a necessary cofactor for Lactate dehydrogenase (3).
- Q. Selenium: This essential trace mineral is a key component of the amino acid selenocysteine. It is vital for the catalytic activity of antioxidant enzymes like Glutathione peroxidase (1).
- R. Pyridoxal phosphate: This active form of Vitamin B6 acts as a coenzyme, particularly in amino acid metabolism and glycogen breakdown. It is required by Glycogen phosphorylase (4).
- S. Molybdenum: This metal ion is integral to the active sites of several enzymes. It is notably found in Nitrogenase (2), which plays a critical role in nitrogen fixation.
Matching Summary Table
| Group I | Group II | Match |
|---|---|---|
| P. NAD$^+$ | 3. Lactate dehydrogenase | P-3 |
| Q. Selenium | 1. Glutathione peroxidase | Q-1 |
| R. Pyridoxal phosphate | 4. Glycogen phosphorylase | R-4 |
| S. Molybdenum | 2. Nitrogenase | S-2 |
Solution Matches
Combining these established pairings yields the sequence P-3, Q-1, R-4, S-2.
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Important Questions from Enzyme Classification Catalytic and Regulatory Strategies
- Correctly match the Coenzyme with its respective involvement in a specific Reaction type.
Coenzyme Reaction type P. Thiamine pyrophosphate 1. Acyl group transfer Q. Tetrahydrofolate 2. Transfer of one carbon group R. Flavin adenine dinucleotide 3. Transfer of methyl group S. 5'-Deoxyadenosyl cobalamin 4. Oxidation-reduction 5. Aldehyde transfer - An enzyme catalyzes a reaction by
- The activity of an enzyme is expressed in International Units (IU). However, the S.I. unit for enzyme activity is Katal. One Katal is
Determine the correctness or otherwise of the following Assertion (a) and the Reason (r)
Assertion: A very low amount of inhibitor can act as an activator for allosteric enzymes.
Reason: Allosteric enzymes follow Michaelis-Menten kinetics.
- Correctly match the Enzyme with its respective Function.
Enzyme Function P. Gyrase 1. Removes a damaged base by cleaving the bond between sugar and base Q. Deadenylase 2. Provides a swivel allowing one DNA strand to rotate around the other R. Glycosylase 3. Catalyses bond formation between 3'-OH and 5'-phosphate end of nucleotides in duplex DNA S. DNA ligase 4. Is an exoribonuclease that removes the poly(A) tail
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