Biology 9700 · AS & A Level · The immune system

The immune system — practice question

Fig. 2.1 presents a transmission electron micrograph of a plasma cell. Plasma cells are antibody-secreting cells that develop from B-lymphocytes.
(a)[6]

Complete Table 2.1 by giving the full names of structures A, B and C, and by stating how each structure works to support the plasma cell’s specific role.

(b(i))[3]

Explain why the production of many identical plasma cells is important.

(b(ii))[4]

B-lymphocytes contain centrioles, and a spindle can be seen during mitosis. Describe and explain how the actions of the centrioles and spindle in a cell undergoing mitosis are linked to chromosome behaviour. You may use the space below for labelled diagrams.

Worked solution & mark scheme

This 13-mark question has a full step-by-step worked solution and mark scheme. One marking point: Structure A identified as nucleus / euchromatin and linked to genetic material and transcription

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI