AQA A LEVEL BIOLOGY UPDATED ACTUAL
EXAM QUESTIONS AND CORRECT
ANSWERS FULL SOLUTION GRADED A+
◉ 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
◉ where is cellulose found?. Answer: plant cell walls
EXAM QUESTIONS AND CORRECT
ANSWERS FULL SOLUTION GRADED A+
◉ 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
◉ where is cellulose found?. Answer: plant cell walls
