The diagram shows an enzyme and four substrates - Edexcel - GCSE Biology - Question 6 - 2014 - Paper 1
Question 6
The diagram shows an enzyme and four substrates.
Draw one straight line from the enzyme to its correct substrate.
The diagram models one way enzymes are thought to ... show full transcript
Worked Solution & Example Answer:The diagram shows an enzyme and four substrates - Edexcel - GCSE Biology - Question 6 - 2014 - Paper 1
Step 1
Draw one straight line from the enzyme to its correct substrate.
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Answer
To identify the correct substrate for the enzyme, observe the shape of the enzyme and the corresponding substrate that fits into it. The correct substrate can be chosen by drawing a straight line from the enzyme symbol to the matching substrate shape that best fits its structure.
Step 2
Complete the sentence by putting a cross (✗) in the box next to your answer.
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Answer
The correct answer is C: lock and key. This hypothesis suggests that enzymes and substrates fit together perfectly, much like a key fits into a lock, demonstrating the specificity of enzyme action.
