Cell Structure & Organisation (Edexcel International A Level (IAL) Biology): Exam Questions

All organisms contain one or more cells.

(i) In which of the following is a cell membrane present?

(1)

(ii) In which of the following is a cell wall present?

(1)

Sailor’s eyeball (Valonia ventricosa) is a single-celled, spherical organism.

The diagram shows one of these cells. A ruler scale has been provided to show the diameter of the diagram when viewed on a screen.

(i) The diameter of this cell is 25 μm.

Calculate the magnification of the diagram.

(2)

(ii) This cell contains chloroplasts.

State the function of these chloroplasts.

(1)

(iii) This cell is not a prokaryotic cell as it contains chloroplasts.

Give one other reason why this organism is not a prokaryotic cell.

(1)

The image shows part of two adjoining plant cells, as seen using an electron microscope.

(i) Name the part labelled X.

(1)

(ii) Explain the function of the part labelled X.

   (2)

Eukaryotic cells contain cell organelles.

The diagram shows part of a eukaryotic cell, as drawn by a student.

The nuclear envelope, nuclear pores and rough endoplasmic reticulum are labelled.

(i) Which of the following is a correct statement about rough endoplasmic reticulum?

(1)

☐ A it has 70S (small) ribosomes
☐ B it has 80S (large) ribosomes
☐ C it forms vesicles surrounding phospholipids only 
☐ D it forms vesicles surrounding polysaccharides only

(ii) Name a substance synthesised by the organelle labelled A in the diagram.

(1)

(iii) Name two structures that could be present inside the nucleus in the diagram.

(2)

1........................................................... 2...........................................................

After cell division, the plant cells produced increase in size.

Explain how these plant cells increase in size.

Woese classified organisms into a three‐domain system.

Plant cells were classified into the Eukarya domain.

The diagram shows an incomplete cell from a plant.

Complete the diagram by drawing an amyloplast, a chloroplast and the tonoplast to show their location and relative size in this cell.

Label these three structures.

The photograph shows an organelle found in a plant cell, as seen using an electron microscope.

State the function of this organelle.

The other domains in the three‐domain system are Archaea and Bacteria.

Complete the table to show in which of the domains the following structures would be found.

Place an X in each appropriate box.