Respiration
Overview
Everything a living thing does, from a heartbeat to a growing root, costs energy. That energy does not come from nowhere: it is released inside cells by a process called respiration, which happens in every living cell every second of your life.
In this lesson you will learn the many jobs that energy is used for in living organisms, and you will investigate how temperature changes the rate of respiration using yeast. By the end you should be able to list what energy powers and explain why warming a cell speeds respiration up, but only up to a point.
Objectives
- State the uses of energy in living organisms, including: muscle contraction, protein synthesis, cell division, active transport, growth, the passage of nerve impulses and the maintenance of a constant body temperature
- Investigate and describe the effect of temperature on respiration in yeast
Lesson Note
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Lesson Evaluation
Congratulations on completing the lesson on Respiration. Now that youve explored the key concepts and ideas, its time to put your knowledge to the test. This section offers a variety of practice questions designed to reinforce your understanding and help you gauge your grasp of the material.
You will encounter a mix of question types, including multiple-choice questions, short answer questions, and essay questions. Each question is thoughtfully crafted to assess different aspects of your knowledge and critical thinking skills.
Use this evaluation section as an opportunity to reinforce your understanding of the topic and to identify any areas where you may need additional study. Don't be discouraged by any challenges you encounter; instead, view them as opportunities for growth and improvement.
- Which of these is NOT a use of energy released by respiration? A. muscle contraction B. active transport C. diffusion of oxygen into a cell D. protein synthesis Answer: C
- Respiration is best described as: A. breathing air in and out B. the chemical release of energy from nutrients in cells C. gas exchange in the alveoli D. the loss of water from leaves Answer: B
- As temperature rises towards the optimum, the rate of respiration in yeast: A. stays the same B. increases C. decreases D. stops Answer: B
- Above the optimum temperature the rate of yeast respiration falls because the enzymes: A. are used up B. are denatured C. multiply D. stop being made Answer: B
- Yeast gives off 30 cm3 of carbon dioxide in 5 minutes. The rate is: A. 5 cm3/min B. 6 cm3/min C. 35 cm3/min D. 150 cm3/min Answer: B
Available on the Green Bridge App
Download the Green Bridge CBT app on your phone or computer to access full lesson notes, practice questions, and more.
Available on the Green Bridge App
Download the Green Bridge CBT app on your phone or computer to access full lesson notes, practice questions, and more.
Recommended Books
Practice Mock Questions
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