AQA
A-Level
BIOLOGY
3.1 | Biological Molecules
1.3 | Lipids
Time allowed
62 minutes
QUESTION PAPER
Score Percentage
/52 %
4.1 | CELL BIOLOGY | QUESTION PAPER 1 1
,(a) The table shows some substances found in cells. Complete the table to show the
properties of these substances. Put a tick in the box if the statement is correct.
Substance
Statement DNA
Starch Glycogen Deoxyribose
helicase
Substance contains only
the elements carbon,
hydrogen and oxygen
Substance is made from
amino acid monomers
Substance is found in
both animal cells and
plant cells
(4)
(b) The diagram shows two molecules of β-glucose.
On the diagram, draw a box around the atoms that are removed when the two
β-glucose molecules are joined by condensation. (2)
(c) (i) Hydrogen bonds are important in cellulose molecules. Explain why.
.............................................................................................................
.............................................................................................................
.............................................................................................................
............................................................................................................. (2)
(ii) A starch molecule has a spiral shape. Explain why this shape is important to
its function in cells.
.............................................................................................................
.............................................................................................................
(1)
............................................................................................................. (Total 9 marks)
, (a) Omega-3 fatty acids are unsaturated. What is an unsaturated fatty acid?
......................................................................................................................
......................................................................................................................
......................................................................................................................
......................................................................................................................
(2)
(b) Scientists investigated the relationship between the amount of omega-3 fatty acids
A-Level
BIOLOGY
3.1 | Biological Molecules
1.3 | Lipids
Time allowed
62 minutes
QUESTION PAPER
Score Percentage
/52 %
4.1 | CELL BIOLOGY | QUESTION PAPER 1 1
,(a) The table shows some substances found in cells. Complete the table to show the
properties of these substances. Put a tick in the box if the statement is correct.
Substance
Statement DNA
Starch Glycogen Deoxyribose
helicase
Substance contains only
the elements carbon,
hydrogen and oxygen
Substance is made from
amino acid monomers
Substance is found in
both animal cells and
plant cells
(4)
(b) The diagram shows two molecules of β-glucose.
On the diagram, draw a box around the atoms that are removed when the two
β-glucose molecules are joined by condensation. (2)
(c) (i) Hydrogen bonds are important in cellulose molecules. Explain why.
.............................................................................................................
.............................................................................................................
.............................................................................................................
............................................................................................................. (2)
(ii) A starch molecule has a spiral shape. Explain why this shape is important to
its function in cells.
.............................................................................................................
.............................................................................................................
(1)
............................................................................................................. (Total 9 marks)
, (a) Omega-3 fatty acids are unsaturated. What is an unsaturated fatty acid?
......................................................................................................................
......................................................................................................................
......................................................................................................................
......................................................................................................................
(2)
(b) Scientists investigated the relationship between the amount of omega-3 fatty acids
