Biology · 2005 · November · Paper 2 · SL · Question paper
BiologyQuestion paper2005SLNovember
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This question paper is listed under Biology in the 2005 examination archive. Its catalogue level is SL. The catalogue session is November. The information below helps you identify the document before opening the complete PDF. Subject, year and session labels come from the archive catalogue; the original cover remains the reference if a label differs. A file is not automatically suitable for your current syllabus simply because its subject name matches.
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8805-6005 8 pages
N05/4/BIOLO/SP2/ENG/TZ0/XX
Thursday 10 November 2005 (afternoon)
BIOLOGY
STANDARD LEVEL
PAPER 2
IB DIPLOMA PROGRAMME
PROGRAMME DU DIPLÔME DU BI
PROGRAMA DEL DIPLOMA DEL BI
INSTRUCTIONS TO CANDIDATES
• Write your session number in the boxes above.
• Do not open this examination paper until instructed to do so.
• Section A: answer all of Section A in the spaces provided.
• Section B: answer one question from Section B. Write your answers on answer sheets. Write
your session number on each answer sheet, and attach them to this examination
paper and your cover sheet using the tag provided.
• At the end of the examination, indicate the numbers of the questions answered in the candidate box
on your cover sheet and indicate the number of sheets used in the appropriate box on your cover
sheet.
1 hour 15 minutes
[Personal identifier removed]
[Personal identifier removed]
0108
8805-6005
– 2 – N05/4/BIOLO/SP2/ENG/TZ0/XX
SECTION A
Answer all the questions in the spaces provided.
1. Potatoes with more starch have a lower percentage water content. This has an advantage in the
transport, cooking and processing of potatoes.
In a strain of Escherichia coli scientists found an enzyme which increases the production of starch.
Using biotechnology, the gene for this enzyme was transferred to potatoes, increasing their starch
content (transgenic potatoes). The gene was transferred to three potato varieties to create three
transgenic lines. The table shows the mean amount of starch and sugar contained in three lines of
transgenic potatoes and normal potatoes (control), after storage for four months at 4 °C.
Carbohydrate / % of fresh weight
Potato Line Sugar Starch
Transgenic
I 0.60 11.07
II 1.56 11.61
III 1.46 12.74
Mean 1.21 11.81
Control
I 5.14 5.88
II 5.61 3.70
III 4.32 6.35
Mean 5.02 5.31
[Source: Stark et al., (1999), Annals of the New York Academy of Sciences, 792, pages 26–36]
(a) State which line of transgenic potato has the greatest amount of starch.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
[1]
(b) (i) Compare the levels of carbohydrate between
File information
Subject
Biology
Document type
Question paper
Year
2005
Session
November
Level
SL
Paper
2
Examination zone
Not labelled in the archive
Language
Not labelled in the archive
File size
411 KB
Pages
8
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