Work out enzyme reaction rates from experimental data

Question 1

Catalase in liver broke down hydrogen peroxide and released 30 cm³ of oxygen in 50 s. What was the mean rate of reaction, in cm³/s?

Answer cm³/s

Question 2

An enzyme was timed digesting the same amount of substrate at different pH values: pH 3: 121 s pH 5: 85 s pH 7: 45 s pH 9: 85 s pH 11: 133 s What is its optimum pH?

Answer 

Question 3

Amylase took 125 s to digest all the starch at pH 7. Calculate the rate using rate = 1000 ÷ time, in s⁻¹.

Answer s⁻¹

Question 4

Catalase in liver broke down hydrogen peroxide and released 20 cm³ of oxygen in 40 s. What was the mean rate of reaction, in cm³/s?

Answer cm³/s

Question 5

An enzyme was timed digesting the same amount of substrate at different pH values: pH 3: 189 s pH 5: 141 s pH 7: 83 s pH 9: 43 s pH 11: 83 s What is its optimum pH?

Answer 

Question 6

Amylase took 250 s to digest all the starch at pH 7. Calculate the rate using rate = 1000 ÷ time, in s⁻¹.

Answer s⁻¹

Question 7

Catalase in liver broke down hydrogen peroxide and released 6 cm³ of oxygen in 30 s. What was the mean rate of reaction, in cm³/s?

Answer cm³/s

Question 8

An enzyme was timed digesting the same amount of substrate at different pH values: pH 3: 89 s pH 5: 45 s pH 7: 95 s pH 9: 129 s pH 11: 159 s What is its optimum pH?

Answer 

Question 9

Amylase took 25 s to digest all the starch at pH 7. Calculate the rate using rate = 1000 ÷ time, in s⁻¹.

Answer s⁻¹

Question 10

Catalase in liver broke down hydrogen peroxide and released 36 cm³ of oxygen in 60 s. What was the mean rate of reaction, in cm³/s?

Answer cm³/s

Question 11

An enzyme was timed digesting the same amount of substrate at different pH values: pH 3: 153 s pH 5: 133 s pH 7: 91 s pH 9: 39 s pH 11: 87 s What is its optimum pH?

Answer 

Question 12

Amylase took 40 s to digest all the starch at pH 7. Calculate the rate using rate = 1000 ÷ time, in s⁻¹.

Answer s⁻¹

Question 13

Catalase in liver broke down hydrogen peroxide and released 36 cm³ of oxygen in 60 s. What was the mean rate of reaction, in cm³/s?

Answer cm³/s

Question 14

An enzyme was timed digesting the same amount of substrate at different pH values: pH 3: 91 s pH 5: 42 s pH 7: 89 s pH 9: 121 s pH 11: 165 s What is its optimum pH?

Answer 

Question 15

Amylase took 125 s to digest all the starch at pH 7. Calculate the rate using rate = 1000 ÷ time, in s⁻¹.

Answer s⁻¹

Question 16

Catalase in liver broke down hydrogen peroxide and released 12.5 cm³ of oxygen in 25 s. What was the mean rate of reaction, in cm³/s?

Answer cm³/s