Question 1
What is the main role of enzymes in digestion?
Correct Answer:
They act as biological catalysts that speed up the breakdown of food molecules
Question 2
According to the lock-and-key model, why is an enzyme specific for a substrate?
Correct Answer:
The active site has a complementary shape to the substrate
Question 3
A learner investigates how temperature affects catalase activity by measuring oxygen volume produced from hydrogen peroxide. At 80 °C the volume is much lower than at 37 °C. What is the best explanation?
Correct Answer:
The enzyme was denatured so the active site shape changed
Question 4
Which mineral is especially important for strong bones and teeth and is listed as essential for physical activity in the Made-for-Wales Integrated Science content?
Correct Answer:
Calcium
Question 5
Word equation for aerobic respiration in humans is best written as:
Correct Answer:
glucose + oxygen → carbon dioxide + water (+ energy/ATP)
Question 1
Exam overview

About this Exam

Prepare with the Wales GCSE Integrated Science Practice Questions - Made-for-Wales GCSE Integrated Science (Single Award) (WJEC) Exam practice quiz. This question bank includes 100 questions covering because, carbon, energy, volume, and distance. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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Wales GCSE Integrated Science Practice Questions - Made-for-Wales GCSE Integrated Science (Single Award) (WJEC) Exam

This practice set contains 100 questions from the matching question bank and focuses on because, carbon, energy, volume, and distance. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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