Biology 9700 · AS & A Level · Carbohydrates and lipids

Carbohydrates and lipids — practice question

Fig. 1.1 shows part of the cell surface membrane of an animal cell.
(a(i))[1]

State the approximate thickness of the membrane indicated by line G-H.

(a(ii))[4]

Complete Table 1.1 to show the names and functions of the components of the cell surface membrane, together with the letters of the labels in Fig. 1.1 that identify each component.

(b(i))[3]

Complete Fig. 1.2 by drawing and labelling a mitochondrion, rough endoplasmic reticulum and smooth endoplasmic reticulum. Your drawings should show the detail that can be seen in a transmission electron micrograph.

(b(ii))[2]

Identify the organelle labelled X and state one function that this organelle carries out.

Worked solution & mark scheme

This 10-mark question has a full step-by-step worked solution and mark scheme. One marking point: An acceptable range for membrane thickness, for example $5\text{-}10\,\text{nm}$, with the unit shown

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