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Leaving Cert Biology: Plant transport

How often Plant transport comes up on the Biology papers, every year it was asked, and questions to try.

HL Asked on 6 of the last 10 Higher Level papers, most recently in 2026. most years

OL Asked on 3 of the last 10 Ordinary Level papers, most recently in 2026.

June 2027 is the first exam on the new Biology course. These come from the 2016–2026 papers, so read them as a guide.

Plant transport, Higher Level(6 marks)

Quick ones on Plant transport.

(a)Loss of water vapour from the leaves?
  1. Translocation
  2. Transpiration
  3. Guttation
(b)Cells that open and close stomata?
  1. Palisade cells
  2. Companion cells
  3. Guard cells
(c)Openings for gas exchange in woody stems?
  1. Lenticels
  2. Root hairs
  3. Stomata
Show the answers

(a) Transpiration

(b) Guard cells

(c) Lenticels

Your turn: Higher Level questions on Plant transport.

Higher Level

Asked on 6 of the last 10 Higher Level papers, most recently in 2026. most years

Every paper, year by year

YearWhere it came up
2026Q4, Q14
2025Not asked
2024Q4
2023Q17
2022Q15
2021Q14
2019Not asked
2018Not asked
2017Q11
2016Not asked

Links open the State Examinations Commission’s paper for that year.

More Plant transport questions

Plant transport, 2 marks

Effect of increasing light intensity on the rate of transpiration?

  1. It decreases
  2. No effect
  3. It increases
Show the answer

It increases

In brighter light the stomata open wider, so more water vapour escapes. Wind and higher temperature also increase transpiration.

Plant transport, 2 marks

Apparatus used to measure water uptake by a leafy shoot?

  1. Respirometer
  2. Potometer
  3. Spirometer
Show the answer

Potometer

A bubble moving along a capillary tube shows how fast the shoot takes up water, which is close to the transpiration rate.

Ordinary Level

Asked on 3 of the last 10 Ordinary Level papers, most recently in 2026.

Every paper, year by year

YearWhere it came up
2026Q16
2025Not asked
2024Q16
2023Not asked
2022Not asked
2021Q15
2019Not asked
2018Not asked
2017Not asked
2016Not asked

Links open the State Examinations Commission’s paper for that year.

More Plant transport questions

Plant transport, 2 marks

The loss of water vapour from the leaves of a plant is called?

  1. Translocation
  2. Respiration
  3. Transpiration
Show the answer

Transpiration

Water evaporates from the leaves and escapes through the stomata. This pull drags more water up the xylem.

Plant transport, 2 marks

Which cells take in water from the soil?

  1. Palisade cells
  2. Root hair cells
  3. Guard cells
Show the answer

Root hair cells

The root hair is long and thin, which gives a huge surface area for absorbing water and minerals.

Plant transport, 2 marks

By which process does water enter a root hair cell?

  1. Osmosis
  2. Active transport
  3. Transpiration
Show the answer

Osmosis

The soil water is more dilute than the cell sap, so water moves in by osmosis across the selectively permeable membrane.

Other Biology topics

All of Leaving Cert Biology