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Aqa Biology A Level Paper 1 Exam Script 7402 Verified Questions

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AQA BIOLOGY A LEVEL PAPER 1 EXAM SCRIPT 7402 VERIFIED QUESTIONS

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AQA BIOLOGY A LEVEL PAPER 1 EXAM SCRIPT
7402 VERIFIED QUESTIONS
ANSWERS ALREADY PASSED

◉ condensation reaction. Answer: a chemical reaction in which two
or more molecules join and produces one water molecule


◉ hydrolysis reaction. Answer: A chemical reaction that breaks
apart a larger molecule by adding a molecule of water


◉ isomers. Answer: Compounds with the same chemical formulae
but different structures.


◉ carbohydrates. Answer: compounds made from carbon, hydrogen
and oxygen (monosaccharides, disaccharides and polysaccharides),
important energy store


◉ monosaccharide. Answer: simple sugars (glucose, fructose,
galactose)


◉ disaccharide. Answer: two monosaccharides joined together by a
glycosidic bond

, ◉ polysaccharide. Answer: many sugar units joined by a glycosidic
bond


◉ maltose. Answer: α glucose + α glucose


◉ lactose. Answer: glucose + galactose


◉ sucrose. Answer: glucose + fructose


◉ where is lactose found?. Answer: milk


◉ where is maltose found?. Answer: germinating seeds


◉ where is sucrose found?. Answer: table sugar


◉ cellulose. Answer: polymer of β glucose


◉ starch. Answer: polymer of α glucose (amylose + amylopectin)


◉ what is the structure of cellulose?. Answer: long, unbranched
chains of β glucose, insoluble

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