OCR A Level Biology B (Advancing Biology)
OCR A Level Biology B (Advancing Biology) Transport Systems in Plants Exam Questions
Free OCR A Level Biology B (Advancing Biology) exam questions on Transport Systems in Plants, with mark schemes. Covers xylem, phloem, transpiration, translocation and the potometer.
Transport Systems in Plants exam questions
1 question pack of real past exam questions with its mark scheme. Answer every question without notes, then mark your answers line by line against the mark scheme.
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A Level Biology Flashcards
Every answer is written in mark scheme wording, so you learn exactly what examiners give marks for. Pick your exam board, then test yourself with the questions on this page.
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About OCR A Level Biology B (Advancing Biology) Transport Systems in Plants
This topic covers transport in plants.
What you need to know
- Xylem Lignified vessels transporting water and minerals.
- Transpiration Factors affecting rate and potometer use.
- Water movement Cohesion-tension, root pressure and pathways.
- Phloem Translocation by mass flow.
Common mistakes in Transport Systems in Plants
- Saying xylem cells are living.
- Confusing transpiration with translocation.
- Forgetting light affects stomata.
Try three Transport Systems in Plants exam-style questions
1. Name one factor that reduces transpiration. (1 mark)
Show the mark scheme answer
High humidity.
2. Explain the cohesion-tension theory. (2 marks)
Show the mark scheme answer
Water evaporates from leaves, creating tension (1); cohesion between water molecules pulls a continuous column up the xylem (1).
3. State the role of lignin. (1 mark)
Show the mark scheme answer
Strengthens xylem and makes it waterproof.
Transport Systems in Plants FAQs
What does this topic cover?
Xylem, phloem, transpiration and translocation.
Which practical links here?
Potometer investigations.
What is a sink?
Where sugars are used or stored, such as roots.
Revise this topic with flashcards: A Level Biology Flashcards, with mark scheme answers for Anki and Quizlet.
