Enzymes

Question 1

what are enzymes

Answer 1

Enzymes are biological catalysts that speeds up the rate of reaction and remains unchanged and reusable at the end of the reaction.

Question 2

what is the function of an enzyme

Answer 2

They lower the activation energy of the reaction.

Question 3

what did the lock and key theory propose?

Answer 3

that each substrate is a key that

only fits a specific lock or enzyme

Question 4

how does amylase break down starch

Answer 4

Amylase is secreted from the salivary glands and pancreas to extracellularly break down starch. Requires Cl– cofactor

Question 5

how does trypsin break down proteins

Answer 5

Trypsin is secreted from the pancreas to extracellularly break down proteins

Question 6

what is the use of a cofactor

Answer 6

Some enzymes require a cofactor, which is a substance which must be present to enable an enzyme to catalyse a reaction at the appropriate rate.

Question 7

what is the temperature coefficient

Answer 7

The temperature coefficient (Q10) for a specific reaction is the effect of a 10°C rise in temperature on the rate of the reaction.

      rate of reaction at (T=10) C Q10 = \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_
      rate of reaction at T

Question 8

factors that effect enzyme activity

Answer 8

• pH
• temperature
• enzyme concentration
• substrate concentration
• competitive and non competitive inhibitor concentration