Work out enzyme reaction rates from experimental data

Question 1

Catalase in liver broke down hydrogen peroxide and released 5 cm³ of oxygen in 20 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: 137 s pH 5: 85 s pH 7: 30 s pH 9: 87 s pH 11: 133 s What is its optimum pH?

Answer 

Question 3

Amylase took 80 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 10 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: 133 s pH 5: 93 s pH 7: 41 s pH 9: 85 s pH 11: 129 s What is its optimum pH?

Answer 

Question 6

Amylase took 80 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 36 cm³ of oxygen in 60 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: 87 s pH 5: 44 s pH 7: 81 s pH 9: 121 s pH 11: 195 s What is its optimum pH?

Answer 

Question 9

Amylase took 200 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 10 cm³ of oxygen in 40 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: 137 s pH 5: 87 s pH 7: 41 s pH 9: 89 s pH 11: 129 s What is its optimum pH?

Answer 

Question 12

Amylase took 100 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 24 cm³ of oxygen in 40 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: 85 s pH 5: 43 s pH 7: 89 s pH 9: 129 s pH 11: 177 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