#84 Question 7

Beetroot cells contain a red pigment that cannot normally escape from the cells through the cell surface membrane. A student carried out an investigation into the effect of temperature on the permeability of the cell surface membrane of beetroot cells.

#83 Question 6

The diagram below shows pressure changes in the left atrium and left ventricle of
the heart and the aorta during the cardiac cycle.

#82 Question 5

The diagram below shows a small part of a human lung as it appears through a microscope.

#81 Question 4

The diagrams below show five molecules found in living organisms.

#80 Question 3

(a) The diagrams show a cell in various stages ofthe mitotic cell cycle.

#79 Question 2

The diagram shows the bacterium Mycobacterium tuberculosis, which causes tuberculosis (TB).

#78 Question 1

(a) The diagram shows a small part of a cell, as seen using an electron microscope.

#77 Questions and answers

In this section is a practice examination paper, similar to the Cambridge International AS Level Biology paper 2. All of the questions are based on the topic areas described in the previous sections.