Describe the cohesion–tension theory of water movement in xylem.
From Mock B · Paper 1 (topics 1–4)
8.22 marks
In a potometer, an air bubble moved 24 mm in 5 minutes along a capillary tube of radius 0.5 mm. Calculate the rate of water uptake in mm³ min⁻¹. (Volume = πr²l)
From Mock B · Paper 1 (topics 1–4)
8.33 marks
Describe the mass flow hypothesis for translocation in phloem.
From Mock B · Paper 3 (all topics, practical skills and essay)
3.13 marks
Describe how you would cut a transverse section of a plant stem and prepare it to observe xylem.
From Mock C · Paper 1 (topics 1–4)
11.13 marks
In a ringing experiment, a ring of bark (including phloem) was removed from a tree trunk. The bark above the ring swelled. Explain what this shows about translocation.
From Mock C · Paper 1 (topics 1–4)
11.22 marks
Give two pieces of evidence against the mass flow hypothesis.
Score 0 / 16 · 0 of 6 marked
This paper is written by Plasmo in the style of the AQA A-Level Biology exam. It is not a past paper and is not produced or endorsed by the exam board.
Mass transport in plants Exam Questions: AQA A-Level Biology | Plasmo