Worksheet 1
Enzymes Worksheet. Homework 1
1. a) Fill in the gaps in the following sentences using the words in the box below.
i) Enzymes are biological ………………… that speed up chemical reactions in living organisms.
ii) Enzymes are protein molecules, which are made up of long chains of ………...……….
iii) The sequence and type of amino acids are ………………… in each protein, so they produce enzymes with many different shapes and functions.
iv) The shape of an enzyme is very important to its ………………….
Different Catalysts Function the same amino acids catalists
b) Enzymes catalyze chemical reactions involved in important processes in the human body. Name one of these processes.
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c) Label the image below with the following terms: active site, reactant, enzyme.
d) i) What is the common name for the above model?
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2. a) Explain what would happen if a reactant molecule with a different shape to the enzyme came into contact with the enzyme’s active site.
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b) There are many factors that affect the rate of enzyme-
c) i) What would happen to an enzyme if the temperature and pH changed significantly beyond the enzyme’s optimum level?
ii) How would this affect enzyme activity?
3. b) Write down the name of the nutrient next to the enzyme that breaks it down. Use the words in the box below.
i) Carbohydrase is an enzyme that breaks down ………………………
ii) Protease is an enzyme that breaks down ………………………
iii) Lipase is an enzyme that breaks down ………………………
iv) Amylase is an enzyme that breaks down ………………………
fats sucrose starch proteins carbohydrates hydrochloric acid
…………………………………………………………………………………………………………………………………………………………………………………………………………
c) i) What would happen to an enzyme if the temperature and pH changed significantly beyond the enzyme’s optimum level?
……………………………………………………………………………………..…………...
ii) How would this affect enzyme activity?
……………………………………………………………..…………………..…….…………
…………………………………………………………………………………..………….………..
3. b) Write down the name of the nutrient next to the enzyme that breaks it down.
Use the words in the box below.
i) Carbohydrase is an enzyme that breaks down ………………………
ii) Protease is an enzyme that breaks down ………………………
iii) Lipase is an enzyme that breaks down ………………………
iv) Amylase is an enzyme that breaks down ………………………
