How does an enzyme work on a chemical reaction that occurs in a substrate?

Question

How does an enzyme work on a chemical reaction that occurs in a substrate??  
A. An enzyme slows down the chemical reaction.  
B. An enzyme speeds up the chemical reaction.  
C. An enzyme has no effect on the chemical reaction.  
D. An enzyme stops most chemical reactions.

Accepted Answer

Correct Answer: (B)An enzyme speeds up the chemical reaction.. 
Rationale: An enzyme works by speeding up the chemical reaction that occurs in a substrate.Enzymes are biological catalysts. They bind to specific substrate molecules at a region called the active site and form an enzyme–substrate complex. By doing this, the enzyme lowers the activation energy required for the reaction to occur. This may involve bringing reactant molecules closer together, straining chemical bonds, or providing an optimal micro-environment for the reaction. The enzyme itself is not consumed and can be reused many times. This speeding up of reactions is essential because most biochemical reactions would occur too slowly to sustain life without enzymes.A) An enzyme slows down the chemical reactionEnzymes do not inhibit or reduce reaction speed. Slowing reactions would interfere with vital processes such as digestion, respiration, and DNA replication.B) An enzyme speeds up the chemical reactionEnzymes increase the rate of chemical reactions by lowering the activation energy barrier. This allows reactions to proceed rapidly at normal body temperature and conditions, ensuring efficient metabolism and cellular function.C) An enzyme has no effect on the chemical reactionWithout enzymes, many reactions would take hours, days, or years instead of milliseconds or seconds. Enzymes dramatically increase reaction rates.D) An enzyme stops most chemical reactionsEnzymes facilitate reactions rather than stopping them. Their role is to promote specific biochemical reactions, not prevent them.ConclusionEnzymes function as catalysts that speed up chemical reactions by lowering activation energy and forming temporary enzyme–substrate complexes. Therefore, the correct answer is B) An enzyme speeds up the chemical reaction.

How does an enzyme work on a chemical reaction that occurs in a substrate?

A
An enzyme slows down the chemical reaction.

B
An enzyme speeds up the chemical reaction.

C
An enzyme has no effect on the chemical reaction.

D
An enzyme stops most chemical reactions.

An enzyme works by speeding up the chemical reaction that occurs in a substrate.

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How does an enzyme work on a chemical reaction that occurs in a substrate?

A An enzyme slows down the chemical reaction. B An enzyme speeds up the chemical reaction. C An enzyme has no effect on the chemical reaction. D An enzyme stops most chemical reactions.

An enzyme works by speeding up the chemical reaction that occurs in a substrate.

Topic Flashcards

Mini Quiz

Related Questions

A
An enzyme slows down the chemical reaction.

B
An enzyme speeds up the chemical reaction.

C
An enzyme has no effect on the chemical reaction.

D
An enzyme stops most chemical reactions.