Q1. [3] medium thorough-understanding
The chapter mentions that ATP is like a 'battery' that can provide energy for many different cellular uses. Using information from the chapter, explain what ATP is, how it is produced during respiration, and give two examples of cellular processes it powers.
Generated by claude-sonnet-4-6 · 2026-06-15 06:45 · grounding rag
Model Answer
ATP (Adenosine Triphosphate) is a molecule that stores and supplies energy for cellular activities.
Production: During respiration, organic compounds like glucose are broken down through a series of chemical reactions. The energy released is stored in the form of ATP molecules.
Two examples of cellular processes powered by ATP:
- Muscle contraction — muscle proteins change shape and arrangement using ATP energy to produce movement.
- Maintenance of life processes such as active transport of materials within cells.
Source: Chapter 5 – Life Processes, Section 5.1; "What You Have Learnt"
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Explanation
- The question has three parts: what ATP is, how it is produced, and two examples — address all three to score full marks.
- The passage directly states: "organic compounds such as glucose are broken down to provide energy in the form of ATP. ATP is used to provide energy for other reactions in the cell." Quote or paraphrase this.
- For examples, the chapter mentions muscle proteins using energy (Chapter 6) and general cellular maintenance. Any two valid cellular uses will earn the mark.
- Avoid over-explaining; this is 3 marks ≈ 60–90 words total.