quiz 1

Question 1

Which enzyme breaks down carbohydrate?

Answer 1

carbohydrase

Question 2

Define ‘’ absorption’’ in biology

Answer 2

When small nutrient molecules diffuse across the small intestine wall into the bloodstream

Question 3

Where in the human body is amalyse produced

Answer 3

salivary glands,pancreas and small intestine

Question 4

Which enzyme breaks down lipids?

Answer 4

Lipase

Question 5

What is the function of the large intestine?

Answer 5

absorb water from undigested food

Question 6

Give examples of mechanical digestion

Answer 6

chewing by teeth and churning by stomach

Question 7

What is the name given to the molecule that is broken down or built up by enzymes?

Answer 7

substrates

Question 8

Where in the human body is protease produced?

Answer 8

stomach,pancreas and small intestine

Question 9

Why is digestion important?

Answer 9

so nutrients are small enough to diffuse through the small intestine wall

Question 10

What is the active site of an enzyme?

Answer 10

The active site is the part which binds to a substrate and where the reaction happens

Question 11

What do lipases digest and what is the product?

Answer 11

Lipids to fatty acids and glycerol

Question 12

In the human body, where does chemical digestion happen

Answer 12

Mouth, stomach and small intestine

Question 13

What is an enzyme?

Answer 13

a protein that speeds up a reaction without being used up itself

Question 14

What role does bile have in digestion?

Answer 14

emulsifies fats, neutralises the pH of stomach acid

Question 15

What are the 2 main types of carbohydrates?

Answer 15

starch and sugar

Question 16

Explain how enzymes break down substrates. Answer in terms of the lock and key theory

Answer 16

substrate binds to the active site of the enzyme
shape of the active site and the substrate are complementary
chemical bonds in the substrate are broken down to produce smaller molecules

Question 17

In order show the order in which food passes the digestive system

Answer 17

Mouth,oesphagus,stomach,small intestine,large intestine,rectum and anus

Question 18

Where is bile stored?

Answer 18

in the gall bladder

Question 19

What is pH?

Answer 19

How acidic or alkaline a solution is

Question 20

What happens when an enzyme is denatured

Answer 20

its active site permanently changes shape so it cant bind to its substrate