Biology 9700/22 — October/November 2015
Cambridge AS Level · AS Level Structured Questions · worked solutions for every part, with the mark scheme
Topics Transport in Mammals · Cell Membranes and Transport · Transport in Plants · Cell Structure · Gas Exchange · Immunity · +6 more
A student compared an image of a plant cell with an image of an animal cell. Both images were at the same magnification.
Parts (a) to (c) are four correct comparative statements about these images.
Both cells contain large numbers of an organelle, bound by a double membrane. The inner membrane of these organelles is folded. These organelles all have a similar structure but do not always appear to have the same shape.
State the name of the organelles described.
Suggest one reason why the organelles described do not always seem to have the same shape.
Both cells contain cell structures that are approximately in diameter and are not bound by a membrane.
State the name of the cell structures described.
Draw a circle around the measurement that has the same value as .
There are strands of cytoplasm passing through channels in the cell wall of the plant cell. These are not visible in the animal cell.
State the name of the cell structures described.
Explain one advantage to the plant cell of having these structures.
Fig. 1.1 is a transmission electron micrograph of part of an epithelial cell from the small intestine of a mammal.
Name the cell structures labelled X in Fig. 1.1 and state their function.
The rest of this paper
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