Cambridge A Level Biology 9700 — 2004 May/June Paper 3 · Variant 1

This document consists of 5 printed pages, 2 blank pages and a Report Form. SP (SC/GR) S64477/3 © UCLES 2004 [Turn over UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Subsidiary Level and Advanced Level BIOLOGY 9700/03 Paper 3 Practical Test AS May/June 2004 1 hour 15 minutes Candidates answer on the Question Paper. Additional Materials: As listed in Instructions to Supervisors. READ THESE INSTRUCTIONS FIRST Write your Centre number, candidate number and name in the spaces provided at the top of this page. Write in dark blue or black pen in the spaces provided on the Question Paper. You may use a soft pencil for any diagrams, graphs or rough working. Do not use staples, paper clips, highlighters, glue or correction fluid. Answer all questions. The number of marks is given in brackets [ ] at the end of each question or part question. You are advised to spend 40 minutes on Question 1 and 35 minutes on Question 2. Centre Number Candidate Number Name For Examiner’s Use If you have been given a label, look at the details. If any details are incorrect or missing, please fill in your correct details in the space given at the top of this page. Stick your personal label here, if provided. 1 2 Total

2 9700/03/M/J/04 1 You are provided with three solutions, S1, S2 and S3. One of the solutions contains glucose, one contains another carbohydrate and the third contains a protein. The solutions may not be in that order. You are required, using only the reagents provided, to identify each of the solutions, S1, S2 and S3. (a) (i) Complete the table below giving the test that you used which positively identified each of the solutions. [4] (ii) Describe the method that you used to identify the carbohydrate solution that was not glucose. … … … … …[3] For Examiner’s Use © UCLES 2004 solution reagent(s) used observations conclusion S1 S2 S3

3 9700/03/M/J/04 [Turn over (iii) Describe how the test you used for glucose can be used as a semi-quantitative test. … … … … … …[4] [Total : 11] For Examiner’s Use © UCLES 2004

4 9700/03/M/J/04 2 K1 is a stained, longitudinal section of a young root tip. Some cells are undergoing mitosis. Use your microscope to examine carefully the regions labelled X and Y in Fig. 2.1. Fig 2.1 (a) Make a large, labelled, high-power drawing of a single cell in either anaphase or metaphase. Identify the stage shown. [4] root cap region X region Y For Examiner’s Use © UCLES 2004

5 9700/03/M/J/04 [Turn over (b) (i) Make a labelled, high-power drawing of two cells, to the same scale, from region X. One cell should be at interphase, the other at or just after telophase. [6] (ii) Make a large, high-power drawing of one cell from region Y, to the same scale as you used in (b)(i). Annotate your drawing to indicate how it differs from the cells you drew in (b)(i). [4] [Total : 14] For Examiner’s Use © UCLES 2004

6 9700/03/M/J/04 BLANK PAGE University of Cambridge International Examinations is part of the University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge.

8 9700/03/M/J/04 REPORT FORM The teacher responsible for this subject is asked to answer the following questions. (a) Was the candidate physically handicapped in drawing or in using a microscope or is the candidate colourblind? If so, give brief details. (b) Was the candidate handicapped by deficient material or apparatus? If so, give brief details. (c) Was it necessary to make any substitutions for the materials sent from Cambridge? If so, give brief details of the circumstances. (d) Any comments. Signed ……………………………………………… N.B. Information that applies to all candidates need be given on the first candidate’s answer book only. © UCLES 2004