The Human Digestive System (AQA GCSE Biology): Quizzes
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12 questions from this quiz
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Practise the questions
12 questions from this quiz
Why does food need to be broken down in the digestive system?
Why does food need to be broken down in the digestive system?
It is large and insoluble
What are the two main purposes of hydrochloric acid in the stomach?
What are the two main purposes of hydrochloric acid in the stomach?
Kills bacteria & creates acidic pH
Where does absorption of soluble molecules like glucose and amino acids occur?
Where does absorption of soluble molecules like glucose and amino acids occur?
Small intestine
Which organ produces bile?
Which organ produces bile?
Liver
What does the large intestine absorb from undigested food?
What does the large intestine absorb from undigested food?
Water
What are enzymes?
What are enzymes?
Biological catalysts
In the lock and key hypothesis, what fits into the enzyme's active site?
In the lock and key hypothesis, what fits into the enzyme's active site?
The substrate
What is the optimum temperature for most human enzymes?
What is the optimum temperature for most human enzymes?
What is the optimum pH for pepsin?
What is the optimum pH for pepsin?
Acidic
Where is amylase produced?
Where is amylase produced?
Salivary glands, pancreas, small intestine
What do lipases convert lipids into?
What do lipases convert lipids into?
Fatty acids and glycerol
What colour does Benedict's test turn if sugars are present?
What colour does Benedict's test turn if sugars are present?
Brick red