Explain ATP use in energy-requiring processes
Cells use ATP supplied by respiration to power processes that require an energy input.
AS Level · Cambridge International Biology 9700, 2028–2030. Interpret only the structures supported by the provided image or description. Written practice is self-checked; it does not demonstrate practical microscopy competence.
Before you begin
- Recognise that organisms are made of cells and that a light microscope produces a magnified image.
Work on paper. Try each question before revealing help, and explain why your method works.
Quick readiness check
What supplies ATP for energy-requiring cell processes?
What you will learn
- State that cells use ATP from respiration for energy-requiring processes
- Give examples of cellular processes that require energy
ATP transfers energy for cell work
Cells use ATP from respiration for energy-requiring processes. ATP can transfer energy to cellular reactions and activities; its use is coupled to processes that need an energy input.
Examples include active transport across membranes, synthesis of large molecules and movement by cellular structures. Respiration provides energy used to regenerate ATP. Do not say that ATP is created from nothing or that one ATP molecule is a long-term energy store.
Match energy use to an example
When a cell transports a substance against its concentration gradient, energy is required. ATP use can be coupled to the transport mechanism. Protein synthesis also requires energy to join amino acids and process the product.
The syllabus outcome asks for the connection between respiration, ATP and energy-requiring processes. Detailed pathways of respiration are covered separately; here focus on how ATP links energy supply to cell work.
Pause and explain
Which process is a clear example of an energy-requiring activity?
Worked example
A cell accumulates ions against a concentration gradient. State the energy source link expected for this process.
Show the worked solution
- Movement against a gradient requires energy.
- Cells use ATP supplied by respiration.
Answer The cell uses ATP from respiration to support the energy-requiring transport of ions against their concentration gradient.
Try a topic test
Choose Easy, Normal or Difficult. Save your answers and open worked review after finishing.
Test this topic →From guided practice to a new situation
Write your answer and reasoning first. Use a hint only if you are stuck. The model solution is for self-checking; your written work is not automatically marked.
State the relationship among respiration, ATP and active transport.
Give me a hint
Include the source, carrier and process.
Compare my reasoning
- Respiration supplies energy used to regenerate ATP.
- ATP is used in active transport against a gradient.
Energy from respiration is used to regenerate ATP, and cells use ATP to support active transport of substances against a concentration gradient.
Look for these in your work
- Respiration connected to ATP
- ATP connected to active transport
Name one other energy-requiring cellular process besides active transport.
Give me a hint
Think about building or moving cell components.
Compare my reasoning
- Protein synthesis requires energy.
- Use ATP from respiration as the energy link.
Protein synthesis is an energy-requiring process. Cells use ATP from respiration to support the synthesis of large molecules such as proteins.
Look for these in your work
- Valid process
- ATP link stated
A student writes “ATP stores all the energy in a cell indefinitely.” Improve the statement.
Give me a hint
Describe ATP as a transferable energy link.
Compare my reasoning
- ATP transfers energy to cellular processes.
- Respiration provides energy used to regenerate ATP.
Cells use ATP from respiration to transfer energy to processes that require it. ATP is continually used and regenerated rather than storing all cellular energy indefinitely.
Look for these in your work
- ATP role accurately stated
- Regeneration noted
Common mistakes
- Saying ATP is produced without a connection to respiration
- Claiming every cellular process uses ATP in exactly the same way
- Confusing energy transfer with matter being created or destroyed
What can you explain now?
What supplies ATP for energy-requiring cell processes?
Compare with the explanation
Respiration
Cells use ATP from respiration.
After trying it yourself, choose your next review. This is your self-assessment.
Your review choice appears on Today. Sign in to sync it across devices.
Make it stick
How does ATP link respiration to active transport and other energy-requiring cell processes?
If you needed the solution, close it and solve the problem again from a blank page. A correct answer is stronger when you can explain the reason for each step.