Question 1
Which feature is found in plant cells but NOT in animal cells?
Correct Answer:
Cell wall
Question 2
Which organelle is the main site of aerobic respiration in a eukaryotic cell?
Correct Answer:
Mitochondrion
Question 3
Enzymes are biological catalysts. What does a catalyst do to a chemical reaction?
Correct Answer:
Speeds up the reaction without being used up
Question 4
According to the 'lock and key' model, why does an enzyme usually act on only one type of substrate?
Correct Answer:
The active site has a specific shape complementary to the substrate
Question 5
An enzyme works fastest at 40 degrees Celsius. At 70 degrees Celsius its activity falls almost to zero. The best explanation is that at 70 degrees Celsius the enzyme has been:
Correct Answer:
Denatured, changing the active site shape
Question 1
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About this Exam

Prepare with the LC Biology Practice Questions - Leaving Certificate Biology (Ireland) Exam practice quiz. This question bank includes 100 questions covering enzyme, called, cells, respiration, and because. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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LC Biology Practice Questions - Leaving Certificate Biology (Ireland) Exam

This practice set contains 100 questions from the matching question bank and focuses on enzyme, called, cells, respiration, and because. 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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