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Cambridge International Examinations Cambridge International (0610... · PDF file 2019-10-05 · *8859812661* Cambridge International Examinations Cambridge International General

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    Cambridge International Examinations Cambridge International General Certificate of Secondary Education

    BIOLOGY 0610/42

    Paper 4 Theory (Extended) February/March 2018

    1 hour 15 minutes

    Candidates answer on the Question Paper.

    No Additional Materials are required.

    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 an HB pencil for any diagrams or graphs.

    Do not use staples, paper clips, glue or correction fluid.

    DO NOT WRITE IN ANY BARCODES.

    Answer all questions.

    Electronic calculators may be used.

    You may lose marks if you do not show your working or if you do not use appropriate units.

    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.

    This syllabus is approved for use in England, Wales and Northern Ireland as a Cambridge International Level 1/Level 2 Certificate.

    This document consists of 17 printed pages and 3 blank pages.

    DC (SC/FC) 145585/4

    © UCLES 2018 [Turn over

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    0610/42/F/M/18© UCLES 2018

    1 (a) (i) Fig. 1.1 is a branching key used to identify different species of bacteria.

    Do the bacteria have flagella?

    Do the bacteria have

    more than one flagellum?

    Do the bacteria have flagella

    attached at one end only?

    Do the bacteria form

    a chain?

    Do the bacteria have

    a spiral shape?

    NoYes

    NoYes NoYes

    NoYes NoYes

    D

    A

    C FE

    B

    Fig. 1.1

    Fig. 1.2 shows six different species of bacteria.

    Use the key to identify the six different species of bacteria.

    Write the letters on the lines in Fig. 1.2.

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    [5] Fig. 1.2

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    0610/42/F/M/18© UCLES 2018 [Turn over

    (ii) State the name of the kingdom that bacteria belong to.

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

    (b) State one similarity between the structure of bacteria and the structure of viruses.

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    (c) Fig. 1.3 is a photomicrograph of Vibrio cholerae, the bacterium that causes cholera.

    magnification ×17 300

    45 mm45 mm

    Fig. 1.3

    (i) Write the formula that would be used to calculate the actual length of the bacterium (not including the flagellum) in Fig. 1.3.

    [1]

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    0610/42/F/M/18© UCLES 2018

    (ii) The actual length of the bacterium shown in Fig. 1.3 is 0.0026 mm.

    Convert this value to micrometres (µm).

    Space for working.

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

    (d) (i) Describe and explain the effects of cholera bacteria on the gut.

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    (ii) Suggest one treatment for cholera.

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

    [Total: 14]

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    0610/42/F/M/18© UCLES 2018 [Turn over

    BLANK PAGE

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    0610/42/F/M/18© UCLES 2018

    2 A study estimated the number of people with chronic obstructive pulmonary disease (COPD) in India. Data were collected from two groups of people, those who lived in cities and those who lived in villages.

    Fig. 2.1 shows the results.

    1996 0

    2

    4

    6

    8

    10

    estimated numbers

    of people with

    COPD / million

    12

    14

    16

    18

    2001 2006

    year

    city

    Key:

    village

    2011 2016

    Fig. 2.1

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    0610/42/F/M/18© UCLES 2018 [Turn over

    (a) Compare the number of people with COPD in cities with the number of people with COPD in villages and suggest reasons for the differences.

    Use the data in Fig. 2.1 to support your answer.

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    ...............................................................................................................................................[6]

    (b) (i) Explain how the body prevents particles in inspired air from reaching the gas exchange surfaces.

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    .......................................................................................................................................[4]

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    0610/42/F/M/18© UCLES