AQA AS BIOLOGY 7401/1 Paper 1 / AQA A LEVEL BIO QUESTIONS Question Paper & Mark scheme Merged June 2023 VERIFIED
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Course
Nursing pharmacology
Institution
Nursing Pharmacology
AQA AS BIOLOGY 7401/1
Paper 1 / AQA A LEVEL BIO
QUESTIONS Question Paper &
Mark scheme Merged June
2023 VERIFIED
Q1.(a) Describe how you would test a piece of food for the presence of
lipid.
..................................................................................................
AQA AS BIOLOGY 7401/1
Paper 1 / AQA A LEVEL BIO
QUESTIONS Question Paper &
Mark scheme Merged June
2023 VERIFIED
,Q1.(a) Describe how you would test a piece of food for the presence of
lipid.
.......................................................................................................................
.
.......................................................................................................................
.
.......................................................................................................................
.
The figure below shows a phospholipid.
(2)
Page 2
(b)
(c)
XY
The part of the phospholipid labelled A is formed from a particular
molecule. Name
this molecule.
.......................................................................................................................
.
Name the type of bond between A and fatty acid X.
.......................................................................................................................
.
(1)
(1)
Page 3
,(d)
Which of the fat - ✔✔✔ANSWER-M1.(a)
(b)
(c)
(d)
(e)
(f)
(g)
M2.(a)
1. Dissolve in alcohol, then add water;
2. White emulsion shows presence of lipid.
Glycerol.
Ester.
Y (no mark)
Contains double bond between (adjacent) carbon atoms in hydrocarbon
chain.
2
1
1
1
2
1
2 max
, [10]
1. Divide mass of each lipid by total mass of all lipids (in that type of cell);
2. Multiply answer by 100.
Red blood cells free in blood / not supported by other cells so cholesterol
helps to maintain shape;
1. 2. 3.
1.
Allow converse for cell from ileum - cell supported by others in
endothelium so cholesterol has less effect on maintaining shape.
Cell unable to change shape;
(Because) cell has a cell wall;
(Wall is) rigid / made of peptidoglycan / murein.
Starch formed from α-glucose but cellulose formed from β-glucose; Page
2
2. Position of hydrogen and hydroxyl groups on carbon atom 1 inverted.
2
(b) 1.
2. Don't affect water potential; OR
3. Helical;
Accept form spirals
4. Compact;
OR
5. Large molecule;
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