UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONSGeneral Certificate of Education Ordinary Level
BIOLOGY 5090/02Paper 2
October/November 2005
1 hour 45 minutesAdditional Materials: Answer Paper
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 pen.You may use a soft pencil for any diagrams, graphs or rough working.Do not use staples, paper clips, highlighters, glue or correction fluid.
Section AAnswer all questions.Write your answers in the spaces provided on the question paper.
Section BAnswer all the questions including questions 6, 7 and 8 Either or 8 Or.Write your answers on the separate answer paper provided.At the end of the examination,1. fasten all your work securely together;2. write an E (for Either) or an O (for Or) next to the number 8 in the grid below to indicate which question
you have answered.
INFORMATION FOR CANDIDATES
The number of marks is given in brackets [ ] at the end of each question or part question.
You are advised to spend no longer than one hour on Section A and no longer than 45 minutes on Section B.
Centre Number Candidate Number Name
FOR EXAMINER’S USE
Section A
Section B
6
7
8
TOTAL
2
5090/02/O/N/05
Section A
Answer all questions.
Write your answers in the spaces provided.
1 Fig. 1.1 is a flow diagram which shows some of the stages in the manufacture of a type of cheese.
Fig. 1.1
Fig. 1.2 shows the changes in pH which occur during the first few hours of this process.
Fig. 1.2
(a) Identify the type of microorganism added to the milk. ..................................................[1]
(c) The enzyme which curdles milk can be obtained from the alimentary canal of a youngmammal. Suggest from which part of the alimentary canal the enzyme is obtained.State a reason for your answer.
part of alimentary canal ....................................................................................................
(d) Fig. 1.3 shows how milk is treated before it is used to make a cheese-like product P.After this treatment, it undergoes a process similar to the one shown in Fig. 1.1. Theend-product has a flavour and texture similar to cheese, but it is considered to behealthier to eat.
Fig. 1.3
(i) Suggest which feature of the manufacturing process in Fig. 1.3 may make product Phealthier to eat than cheese.
(a) (i) Identify blood vessels M, N and O in Fig. 5.1.
M ......................................................
N .......................................................
O ....................................................... [3]
(ii) Name the type of tissue which forms the major part of the heart and name theblood vessel which supplies this tissue with oxygen unless it is blocked by heartdisease.
type of tissue ....................................
(c) The four statements below describe some of the events that occur during the flow ofblood through the heart. By placing the numbers 1 to 4 in the boxes, indicate the correctsequence of these events, starting immediately after deoxygenated blood has enteredthe heart and ending as the blood is sent to the lungs.
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University of Cambridge International Examinations is part of the University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department ofthe University of Cambridge.
