AQA AS BIOLOGY 7401/2 PAPER 2 MARK
SCHEME JUNE 2021 ACTUAL EXAM 2026
QUESTIONS WITH ANSWERS 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
SCHEME JUNE 2021 ACTUAL EXAM 2026
QUESTIONS WITH ANSWERS 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
