The Human Digestive System (OCR GCSE Biology A (Gateway Science Suite)): 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 & insoluble
What is the main purpose of hydrochloric acid in the stomach?
What is the main purpose of hydrochloric acid in the stomach?
Kill bacteria & create acidic environment
Where does absorption of soluble molecules like glucose occur?
Where does absorption of soluble molecules like glucose occur?
Small intestine
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 forms when substrate binds to enzyme?
In the lock and key hypothesis, what forms when substrate binds to enzyme?
Enzyme-substrate complex
What is the optimum temperature for most enzymes in the body?
What is the optimum temperature for most enzymes in the body?
37°C
What happens to an enzyme when it is denatured?
What happens to an enzyme when it is denatured?
Active site shape changes
What does amylase break starch down into?
What does amylase break starch down into?
Maltose
What products do lipases produce from lipids?
What products do lipases produce from lipids?
Fatty acids & glycerol
What colour change indicates a positive Benedict's test for sugars?
What colour change indicates a positive Benedict's test for sugars?
Brick red
How does bile help in lipid digestion?
How does bile help in lipid digestion?
Breaks large fat droplets into smaller ones