Enzymes are very specific because both the enzyme and the substrate possess specific complementary geometric shapes that fit exactly into one another, that model is called:

Correct option is B

The Lock and Key Model explains the specificity of enzymes in terms of their ability to interact with specific substrates. According to this model, the enzyme's active site has a specific geometric shape that perfectly fits the substrate, much like a key fitting into a lock. This structural complementarity allows the enzyme to catalyze the reaction by binding to the substrate.
Information Booster: The Lock and Key Model was proposed by Emil Fischer in 1894. It emphasizes that the enzyme's active site is rigid and complementary in shape to the substrate, which ensures high specificity in enzyme-substrate interactions. However, it's important to note that more modern theories, such as the Induced Fit Model, suggest that the enzyme’s active site can slightly adjust its shape upon substrate binding, providing further flexibility in enzyme activity.
Additional Knowledge:
· Triangular Model: This is not a recognized term in enzyme-substrate interaction theory.
· Hexagon Model: This is also not a widely accepted model in enzyme specificity.
· Pentagonal Model: This is not related to enzyme-substrate interaction either.
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