BIOLOGY 0610/6/O/N/01 1 Fig.1.1 shows a strip of ‘Irish’ potato tuber, A, immersed in water....

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TIME 1 hour INSTRUCTIONS TO CANDIDATES Write your name, Centre number and candidate number in the spaces at the top of this page. Answer all questions. Write your answers in the spaces provided on the question paper. Use a sharp pencil for your drawings. Coloured pencils or crayons should not be used. INFORMATION FOR CANDIDATES The intended number of marks is given in brackets [ ] at the end of each question or part question. International General Certificate of Secondary Education UNIVERSITY OF CAMBRIDGE LOCAL EXAMINATIONS SYNDICATE BIOLOGY 0610/6 PAPER 6 Alternative to Practical OCTOBER/NOVEMBER SESSION 2001 1 hour Candidates answer on the question paper. No additional materials are required. This question paper consists of 10 printed pages and 2 blank pages. SPA (NH) S07291/1 © UCLES 2001 [Turn over Candidate Centre Number Number Candidate Name FOR EXAMINER’S USE 1 2 3 4 TOTAL

Transcript of BIOLOGY 0610/6/O/N/01 1 Fig.1.1 shows a strip of ‘Irish’ potato tuber, A, immersed in water....

Page 1: BIOLOGY 0610/6/O/N/01 1 Fig.1.1 shows a strip of ‘Irish’ potato tuber, A, immersed in water. Fig.1.2 shows a similar strip, B, in a concentrated sugar solution. Both strips are

TIME 1 hour

INSTRUCTIONS TO CANDIDATES

Write your name, Centre number and candidate number in the spaces at the top of this page.

Answer all questions.

Write your answers in the spaces provided on the question paper.

Use a sharp pencil for your drawings. Coloured pencils or crayons should not be used.

INFORMATION FOR CANDIDATES

The intended number of marks is given in brackets [ ] at the end of each question or part question.

International General Certificate of Secondary Education

UNIVERSITY OF CAMBRIDGE LOCAL EXAMINATIONS SYNDICATE

BIOLOGY 0610/6PAPER 6 Alternative to PracticalOCTOBER/NOVEMBER SESSION 2001 1 hour

Candidates answer on the question paper.No additional materials are required.

This question paper consists of 10 printed pages and 2 blank pages.

SPA (NH) S07291/1© UCLES 2001 [Turn over

CandidateCentre Number Number

Candidate Name

FOR EXAMINER’S USE

1

2

3

4

TOTAL

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1 Fig. 1.1 shows a strip of ‘Irish’ potato tuber, A, immersed in water.

Fig. 1.2 shows a similar strip, B, in a concentrated sugar solution. Both strips are fixed to asupport at one end and have identical masses firmly attached to the other end.

Fig. 1.1 Fig. 1.2

(a) (i) Complete the diagrams below to show how the potato strips would appear after theapparatus had been left for five hours.

[2]

(ii) Explain what has happened to potato strip B.

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potato strip Bpotato strip A

supportpotato strip A

10 g mass

water

10 g mass support

concentratedsugar solution

potato strip B

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(iii) Sketch a single cell from potato strip B as it might appear when viewed under themicroscope. Labels are not required.

[1]

(b) Describe what would happen to red blood cells if they were placed in water for fivehours. Explain your answer.

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[Total : 10]

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2 Fig. 2.1 shows the external features of a five-year old cod.

Fig. 2.1

(a) (i) In the space below, make a drawing to show the main external features of the cod.Your drawing should be as large as the fish shown in Fig. 2.1. Do not shade yourdrawing.

[4]

(ii) Label, with the letters X and Y, two external features on your drawing that showthat the cod is adapted for movement in an aquatic environment. [2]

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(iii) Explain the roles of X and Y in the process of movement.

X ................................................................................................................................

...................................................................................................................................

Y ................................................................................................................................

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(iv) Indicate clearly on your drawing where the structures that carry out gaseousexchange are located. [1]

(b) A five-year old cod measures 70 cm in length.

Measure the length of the fish in Fig. 2.1.

length ..................................................

Calculate the magnification of Fig. 2.1. Show your working.

magnification .............................................[2]

[Total : 11]

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3 Four similar leaves were removed from the lower branches of a tree and a piece of threadwas attached to each leaf stalk (petiole), as shown in Fig. 3.1. A thin, waterproof covering ofVaseline was applied to the leaf surfaces, as shown below, and over the exposed end ofeach leaf stalk.

Fig. 3.1

Each leaf was then weighed and its mass was recorded.The leaves were suspended from stands to allow air to circulate freely.The mass of each leaf was recorded every 2 hours, as shown in Table 3.1.

Table 3.1

lower surfaceonly

upper surfaceonly

both upper andlower surfaces

neithersurface

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mass (g)

0 hours

6.8

6.8 6.8

6.7 6.6 6.6 6.5

6.26.9

6.97.0 7.0

5.8 5.1 4.9 4.7

5.5 5.35.8

6.5

2 hours 4 hours 6 hours 8 hours

surface to whichVaseline wasapplied

lower surface only

upper surface only

both surfaces

neither surface

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(a) On the grid below, plot mass against time for each leaf. The four sets of data should beplotted on the same axes. Each curve should be distinct and clearly labelled.

[4]

(b) (i) Calculate which leaf lost the most mass.

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(ii) Explain how this loss of mass occurred.

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(iii) Describe a simple procedure to investigate why the leaf Vaselined only on thelower surface still lost mass.

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[Total : 11]

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4 Under suitable conditions, yeast cells grow and produce daughter cells so rapidly that theyform short chains or clumps, as shown in Fig. 4.1.

Fig. 4.1

(a) Name the process that results in the formation of new cells, as shown in Fig. 4.1.

......................................................................................................................................[1]

(b) (i) Suggest two requirements for the rapid growth of yeast.

1. ...............................................................................................................................

2. ...........................................................................................................................[2]

(ii) When yeast grows, it produces a gas.

Draw a labelled diagram of the apparatus that you might use to collect this gas.

[3]

(x7100)

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(iii) Describe a simple test to identify the gas collected and the result you would expect.

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[Total : 8]

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