Trying Is Better Than Crying

UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level

* 7 4 8 7 5 2 9 1 0 5 *

BIOLOGY Paper 3 Practical Test Candidates answer on the Question Paper. Additional Materials: As specified in the Confidential Instructions.

5090/32
May/June 2013 1 hour 15 minutes

READ THESE INSTRUCTIONS FIRST Write your Centre number, candidate number and name on all the work you hand in. Write in dark blue or black ink. You may use a soft pencil for any diagrams, graphs or rough working. Do not use red ink, staples, paper clips, highlighters, glue or correction fluid. DO NOT WRITE IN ANY BARCODES. Answer all questions. At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question. Electronic calculators may be used.

For Examiner’s Use 1 2 3 Total

This document consists of 8 printed pages.
DC (NF/CGW) 73661 © UCLES 2013

[Turn over

2 In order to plan the best use of your time, read through all the questions on this paper carefully before starting work.
For Examiner’s Use

1

The movement of food molecules from the intestines can be investigated using a length of Visking tubing to represent a part of the digestive system. This tubing is made of a flexible transparent material. You will investigate the movement of starch and glucose through the walls of this tubing into water. Fig. 1.1 shows the apparatus you will use. clip

Visking tubing containing solution A large test-tube of water

end of tubing securely tied Fig. 1.1

beaker to support large test-tube

(a) Describe how you will carry out a test for a reducing sugar. .......................................................................................................................................... .............................................................................................................................................