AQA A-LEVEL BIOLOGY EXAM SCRIPT TEST
BANK FULL SOLUTION 2026 VIEW AHEAD
EXAM.
⫸ unsaturated fatty acid. Answer: a fatty acid with one or more
double bonds between the carbons (mono or poly)
⫸ phospholipid. Answer: 1 glycerol + 2 fatty acids + 1 phosphate
⫸ polar. Answer: molecule with partial charges due to a difference in
electronegativity
⫸ hydrophobic. Answer: water repulsion
⫸ hydrophillic. Answer: attracted to water
⫸ what is the test for lipids?. Answer: emulsion test
⫸ describe the emulsion test. Answer: mix with ethanol and add
water, white cloudy emulsion = lipid
⫸ amino acid. Answer: monomer of proteins
, ⫸ amino acid structure. Answer: central carbon atom, hydrogen atom,
variable (R) group, carboxyl group (COOH) and amine group (NH2)
⫸ amine group. Answer: -NH2
⫸ carboxyl group. Answer: -COOH
⫸ protein. Answer: polymer of amino acids linked by peptide bonds
⫸ dipeptide. Answer: product of the condensation of two amino acids
⫸ polypeptide. Answer: long chain of amino acids joined by peptide
bonds
⫸ disulphide bridges. Answer: a strong covalent bond formed with
the sulfur of cysteine monomers
⫸ R group. Answer: a variable/functional group that defines an
amino acid
⫸ primary structure. Answer: sequence of amino acids, coded by
DNA
⫸ secondary structure. Answer: local folding of the chain to form
either an α-helix or β-pleated sheet
BANK FULL SOLUTION 2026 VIEW AHEAD
EXAM.
⫸ unsaturated fatty acid. Answer: a fatty acid with one or more
double bonds between the carbons (mono or poly)
⫸ phospholipid. Answer: 1 glycerol + 2 fatty acids + 1 phosphate
⫸ polar. Answer: molecule with partial charges due to a difference in
electronegativity
⫸ hydrophobic. Answer: water repulsion
⫸ hydrophillic. Answer: attracted to water
⫸ what is the test for lipids?. Answer: emulsion test
⫸ describe the emulsion test. Answer: mix with ethanol and add
water, white cloudy emulsion = lipid
⫸ amino acid. Answer: monomer of proteins
, ⫸ amino acid structure. Answer: central carbon atom, hydrogen atom,
variable (R) group, carboxyl group (COOH) and amine group (NH2)
⫸ amine group. Answer: -NH2
⫸ carboxyl group. Answer: -COOH
⫸ protein. Answer: polymer of amino acids linked by peptide bonds
⫸ dipeptide. Answer: product of the condensation of two amino acids
⫸ polypeptide. Answer: long chain of amino acids joined by peptide
bonds
⫸ disulphide bridges. Answer: a strong covalent bond formed with
the sulfur of cysteine monomers
⫸ R group. Answer: a variable/functional group that defines an
amino acid
⫸ primary structure. Answer: sequence of amino acids, coded by
DNA
⫸ secondary structure. Answer: local folding of the chain to form
either an α-helix or β-pleated sheet
