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B2: Quiz 5 – Answers
B2: Quiz 5 – Answers
1) Digestive enzymes break down larger molecules into smaller ones so that the smaller molecules can pass through the walls of the digestive system and into the bloodstream
2)
a)
2)
a)
b) Salivary gland (located in the mouth), the small intestine and the pancreas
3)
a) Protease
b) Small intestine, pancreas and the stomach
4)
a) Enzyme: lipase
Products: glycerol & fatty acids
b) Small intestine and pancreas
5) Any 2 from:
6)
a)
i) Liver
ii) Gall bladder
b) Way 1: the contents of the stomach are very acidic. Bile is an alkali that neutralises what comes out of the stomach and makes it slightly alkaline. The slightly alkaline conditions are the conditions that the digestive enzymes work best at.
Way 2: bile also emulsifies fats, which means that the fats become tiny droplets. These tiny droplets offer a greater surface area for the lipase enzyme to work with compared to one big droplet of fat. This results in faster digestion.
3)
a) Protease
b) Small intestine, pancreas and the stomach
4)
a) Enzyme: lipase
Products: glycerol & fatty acids
b) Small intestine and pancreas
5) Any 2 from:
- made into new carbohydrates
- made into new lipids
- made into new proteins
- some of the glucose is used for respiration
6)
a)
i) Liver
ii) Gall bladder
b) Way 1: the contents of the stomach are very acidic. Bile is an alkali that neutralises what comes out of the stomach and makes it slightly alkaline. The slightly alkaline conditions are the conditions that the digestive enzymes work best at.
Way 2: bile also emulsifies fats, which means that the fats become tiny droplets. These tiny droplets offer a greater surface area for the lipase enzyme to work with compared to one big droplet of fat. This results in faster digestion.
Questions
1) Explain how digestive enzymes help the digestion process.
2) Amylase is an example of a carbohydrase.
a) Fill in the gaps below for the substance that amylase breaks down and the product that is produced.
1) Explain how digestive enzymes help the digestion process.
2) Amylase is an example of a carbohydrase.
a) Fill in the gaps below for the substance that amylase breaks down and the product that is produced.
b) Give 3 places where amylase in produced in the human body.
3)
a) What is the name of the enzyme that breaks down proteins into amino acids?
b) Give 3 places where this enzyme is produced.
4) The diagram below shows lipids being broken down to produce some substances.
3)
a) What is the name of the enzyme that breaks down proteins into amino acids?
b) Give 3 places where this enzyme is produced.
4) The diagram below shows lipids being broken down to produce some substances.
a) Write down the enzyme and the substances produced when lipids are broken down.
b) Give two places where this enzyme is produced.
5) Give two things that the body does with the products of digestion.
6) This question is all about bile.
a)
i) Where is bile produced?
ii) Where is bile stored?
b) Bile aids digestion in two ways. Describe both of these ways and explain how they aid digestion.
b) Give two places where this enzyme is produced.
5) Give two things that the body does with the products of digestion.
6) This question is all about bile.
a)
i) Where is bile produced?
ii) Where is bile stored?
b) Bile aids digestion in two ways. Describe both of these ways and explain how they aid digestion.