AQA A LEVEL BIOLOGY EXAM SCRIPT
VERIFIED QUESTIONS WITH ACCURATE
ANSWERS
●● What are polymers?
Answer: Polymers are molecules made from *many monomers* joined
together.
●● What are examples of monomers?
Answer: *Monosaccharides, amino acids* and *nucleotides*
●● What are examples of polymers?
Answer: *Polysaccharides, polypeptides* and *polynucleotides*
●● What reaction allows two monomers to bond together?
Answer: A *condensation reaction* allows *two monomers* to be
joined together by a chemical bond, *releasing a water molecule*.
●● What reaction breaks the chemical bond between two molecules?
Answer: A *hydrolysis reaction* allows the chemical bond to break
between two molecules and this happens due to the *addition of water*.
,●● What are carbohydrates?
Answer: Carbohydrates are molecules which consist only of *carbon,
hydrogen and oxygen*.
●● What is the small unit that makes up a carbohydrate.
Answer: Monosaccharides
●● What is formed when two monosaccharides go through condensation
reaction?
Answer: A *disaccharide* is formed.
●● What is the special bond that is formed during the condensation
reaction between two monosaccharides?
Answer: A *glycosidic bond*
●● What is formed when many monosaccharides go through
condensation reaction?
Answer: A *polysaccharide* is formed.
●● What are examples of monosaccharides?
Answer: - *Glucose* (*α-glucose* and *β glucose*)
- *Galactose*
- *Fructose*
, ●● What is the structure of both α-glucose and β glucose?
Answer: They both have *6 carbon atoms*, α-glucose has its OH group
attached at the *bottom right* and β glucose has its OH group attached
at the *top right*.
●● Which disaccharide is formed when two α-glucose molecules join
together?
Answer: Maltose
●● Which disaccharide is formed when a glucose molecule and fructose
join together?
Answer: Sucrose
●● Which disaccharide is formed when a glucose molecule and
galactose join together?
Answer: Lactose
●● What are the three polysaccharides that are formed from glucose
monomers?
Answer: - *Glycogen* (formed by the condensation of α-glucose)
- *Starch* (formed by the condensation of α-glucose)
VERIFIED QUESTIONS WITH ACCURATE
ANSWERS
●● What are polymers?
Answer: Polymers are molecules made from *many monomers* joined
together.
●● What are examples of monomers?
Answer: *Monosaccharides, amino acids* and *nucleotides*
●● What are examples of polymers?
Answer: *Polysaccharides, polypeptides* and *polynucleotides*
●● What reaction allows two monomers to bond together?
Answer: A *condensation reaction* allows *two monomers* to be
joined together by a chemical bond, *releasing a water molecule*.
●● What reaction breaks the chemical bond between two molecules?
Answer: A *hydrolysis reaction* allows the chemical bond to break
between two molecules and this happens due to the *addition of water*.
,●● What are carbohydrates?
Answer: Carbohydrates are molecules which consist only of *carbon,
hydrogen and oxygen*.
●● What is the small unit that makes up a carbohydrate.
Answer: Monosaccharides
●● What is formed when two monosaccharides go through condensation
reaction?
Answer: A *disaccharide* is formed.
●● What is the special bond that is formed during the condensation
reaction between two monosaccharides?
Answer: A *glycosidic bond*
●● What is formed when many monosaccharides go through
condensation reaction?
Answer: A *polysaccharide* is formed.
●● What are examples of monosaccharides?
Answer: - *Glucose* (*α-glucose* and *β glucose*)
- *Galactose*
- *Fructose*
, ●● What is the structure of both α-glucose and β glucose?
Answer: They both have *6 carbon atoms*, α-glucose has its OH group
attached at the *bottom right* and β glucose has its OH group attached
at the *top right*.
●● Which disaccharide is formed when two α-glucose molecules join
together?
Answer: Maltose
●● Which disaccharide is formed when a glucose molecule and fructose
join together?
Answer: Sucrose
●● Which disaccharide is formed when a glucose molecule and
galactose join together?
Answer: Lactose
●● What are the three polysaccharides that are formed from glucose
monomers?
Answer: - *Glycogen* (formed by the condensation of α-glucose)
- *Starch* (formed by the condensation of α-glucose)
