Edexcel A-Level Biology AS 3.1 Cells As the Basis of Life Questions

Identify named plant cell types and distinguish their cell membranes, walls and specialised structures using complete diagrams and microscopy evidence.

Exam points

Identify plant cell types and specialised structures from diagrams or microscopy evidence.
Recognise cell membranes as shared boundaries and cell walls as additional plant or prokaryotic structures.
Distinguish xylem, phloem and sclerenchyma cells by their structural identity and context.

[Maximum number: 3]

The photograph shows two human cheek cells on a microscope slide. The mean diameter of human cheek cells is $60 \mu \mathrm{~m}$ .

Figure for Question Edexcel A-Level Biology AS 3.1 Cells As the Basis of Life Questions question 1 — Edexcel A-Level Biology AS

(a)

The photograph below shows part of a transverse section of a plant stem.

Three types of cell are labelled X, Y and Z.

Figure for Question (a) — Edexcel A-Level Biology AS

[ 3 ]

(i)

Identify the cell types labelled X, Y and Z. X Y Z

[ 2 ]

(ii)

The photograph shows a longitudinal section of where two plant cells meet.

Figure for Question (ii) — Edexcel A-Level Biology AS

State which of the cells labelled X, Y or Z is shown in this longitudinal section.

Cell

[ 1 ]

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Edexcel A-Level Biology AS 3.1 Cells As the Basis of Life Questions question 1

Question (a)

Question (i)

Question (ii)