Double Award Science: Biology Exam Answers

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Sp N ec e ifi w ca tio n General Certificate of Secondary Education 2012–2013 Double Award Science: Biology Unit B1 Higher Tier [GSD12] MONDAY 12 NOVEMBER 2012 1.30 pm–2.30 pm MARK SCHEME 8341.01 1 (a) Fat Protein Ethanol Biuret Blue White [4] AVAILABLE MARKS (b) Energy intake/food intake is higher/too much food eaten/junk food/bad food is cheaper/cheap alcohol [1] Not enough exercise/sedentary lifestyle described [1] [2] (c) sodium/salt/fat/cholesterol [1] glucose/sugar [1] [2] (d) (i) Indicative Content: • Place DCPIP in test-tube • Add drops of juice to the DCPIP • Shake/mix • Count the number of drops of juice (needed to produce colour change in the DCPIP) • DCPIP goes colourless/clear or changes from…show more content…
They use good spelling, punctuation and grammar and the form and style are of a high standard. Candidates must use some appropriate specialist terms throughout using 3 or 4 of the above points to partially describe how they would compare the amounts of vitamin C in freshly squeezed orange juice and processed orange juice. They use satisfactory spelling, punctuation and grammar and the form and style are of a satisfactory standard. Candidates describe using 1 or 2 of the above points how they would compare the amounts of vitamin C in freshly squeezed orange juice and processed orange juice. However, these are not presented in a logical sequence. They use limited spelling, punctuation and grammar and they have made little use of specialist terms. Response not worthy of…show more content…
Answers must include the colour changes at the three times. They use good spelling, punctuation and grammar and the form and style are of a high standard. Candidates must use some appropriate specialist terms throughout using 3 or 4 of the above points to describe and explain the results. They use satisfactory spelling, punctuation and grammar and the form and style are of a satisfactory standard. Candidates describe and explain, using 1 or 2 of the above points, the results expected from this experiment. However, these are not presented in a logical sequence. They use limited spelling, punctuation and grammar and they have made little use of specialist terms. Response not worthy of credit. indicator is red photosynthesis and respiration are balanced/equal/ at same rate/compensation point carbon dioxide absorbed equals carbon dioxide given out indicator is purple photosynthesis is greater than rate of respiration more carbon dioxide taken in than is given out

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