Q.4 Which of the following statement is con•ect about enzyme?
1. A bio catalyst that increases the rate of chemical reaction
2. A biocatalyst that inhibit the rate of chemical reaction
3. Non specific in nature
4. All enzymes are proteinacious in nature
Enzymes are biocatalysts that accelerate chemical reactions, making option 1 the correct statement.
Option Analysis
1. A bio catalyst that increases the rate of chemical reaction
Enzymes lower activation energy, speeding up reactions by factors of millions without being consumed, essential for cellular metabolism under physiological conditions.
2. A biocatalyst that inhibit the rate of chemical reaction
Enzymes enhance, not inhibit, reaction rates; inhibitors reduce activity, but that’s not the enzyme’s function.
3. Non specific in nature
Enzymes are highly specific, acting on particular substrates via unique active sites, following lock-and-key or induced-fit models.
4. All enzymes are proteinacious in nature
Most enzymes are proteins, but ribozymes (catalytic RNAs) exist, like self-splicing introns, disproving “all.”
The correct statement about enzyme defines it as a biocatalyst that increases the rate of chemical reaction, vital for molecular biology and biotech exam prep like GATE Life Sciences.
Enzyme Fundamentals
Enzymes bind substrates at active sites, stabilizing transition states to accelerate reactions without altering equilibrium.
Option Breakdown
| Option | Accuracy | Reason |
|---|---|---|
| 1. Increases reaction rate | Correct | Core definition as biological catalysts. |
| 2. Inhibits reaction rate | Incorrect | Opposite of catalytic role. |
| 3. Non-specific | Incorrect | Highly substrate-specific. |
| 4. All proteins | Incorrect | Ribozymes are RNA enzymes. |
This specificity aids plant physiology, genetics, and PCR techniques in your studies.
