Multiple Choice
Which of the following functional groups is present in all naturally occurring amino acids?
2. Molecular Representations
Functional Groups
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Which of the following best describes the 'lock and key' model in the context of enzyme-substrate interaction?
A
The enzyme and substrate form a covalent bond.
B
The substrate is modified to fit the enzyme's active site.
C
The enzyme changes shape to fit the substrate.
D
The substrate fits into the enzyme's active site without any change in shape.
Verified step by step guidance1
Understand the 'lock and key' model: This model describes how enzymes and substrates interact. The enzyme's active site is like a 'lock,' and the substrate is the 'key' that fits perfectly into the lock without any modification.
Recognize the specificity: The 'lock and key' model emphasizes the specificity of enzyme-substrate interactions, where only specific substrates fit into the enzyme's active site due to complementary shapes.
Differentiate from other models: Unlike the 'induced fit' model, where the enzyme changes shape to accommodate the substrate, the 'lock and key' model suggests no change in shape for either the enzyme or the substrate.
Identify the correct description: Among the given options, the correct description of the 'lock and key' model is that the substrate fits into the enzyme's active site without any change in shape.
Apply the concept: Use this understanding to analyze enzyme-substrate interactions in various biochemical processes, recognizing the importance of shape and structure in these interactions.
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