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Enzymes are complex protein structures that function as biological catalysts - VCE - SSCE Chemistry - Question 6 - 2010 - Paper 1
Question 6
Enzymes are complex protein structures that function as biological catalysts. a. Why does a particular enzyme generally only catalyse a specific reaction? Invera... show full transcript
Worked Solution & Example Answer:Enzymes are complex protein structures that function as biological catalysts - VCE - SSCE Chemistry - Question 6 - 2010 - Paper 1
Step 1
Why does a particular enzyme generally only catalyse a specific reaction?
Answer
A particular enzyme only catalyses a specific reaction due to its unique active site, which is specifically structured to bind only to its substrates. The shape and chemical environment of the active site allow for precise interactions, leading to an effective catalytic action.
Step 2
Step 3
Why does changing the pH from the optimum value cause a decrease in the activity of the enzyme?
Answer
Changing the pH from the optimum value affects the enzyme's tertiary structure, altering the shape of the active site. This change can disrupt the enzyme-substrate binding, leading to decreased activity.
Step 4
Calculate the mass of glucose produced in 30 minutes.
Answer
Using the formula:
Where:
- activity = 300 mmol glucose/mg invertase
- time = 30 min (or the factor required for final mass conversion)
- concentration = 1.00 × 10⁻⁴ g invertase
Conclusively, calculate the final mass of glucose produced, which amounts to 5400 mg or 5.4 g.