Module 1 · Practice
Practice questions
Three difficulty levels. Have a proper go before checking the answers.
Section A — Easy
Recall and definitions
Name the three types of variable in a fair test.
State which nutrient is the body's main source of energy.
Match each food test to the nutrient it tests for: iodine, Benedict's, Biuret, ethanol.
Put these in order, from first to last: small intestine, mouth, stomach, oesophagus, large intestine.
Name the three harmful substances in tobacco smoke and one effect of each.
Which deficiency causes anaemia?
Section B — Medium
Short application
A pupil tests a sample of bread with iodine and it turns blue-black. With Benedict's, the colour stays blue. What does this tell you about the bread?
Explain how the structure of the small intestine helps it absorb nutrients efficiently.
State which enzyme breaks down each food group and what it produces.
Why does carbon monoxide reduce a smoker's ability to exercise?
A student is investigating how temperature affects amylase activity. Identify the independent, dependent and one control variable.
Section C — Hard
Extended thinking
Explain why someone with a damaged liver may have problems digesting fatty food.
A friend says, "I'll just skip breakfast — I'll save energy and lose weight." Use what you know about a balanced diet to evaluate this.
Explain how alcohol affects driving. Use ideas about the nervous system in your answer.
A scientist measures the surface area of a healthy small intestine as roughly 30 m². Suggest how a disease that flattens the villi would affect a person's nutrition, and why.