AQA A-level Biology paper 1 2026
Questions and Answers
Benedict's test - Correct answer-Which food test is heated in a water bath?
Sucrose - Correct answer-Which disaccharide is not a reducing sugar?
Test for non-reducing sugars - Correct answer-Add acid. Neutralise. Add
Benedicts. Heat.
Hydrolysis - Correct answer-Reaction performed by dilute HCl in the non reducing
sugar test.
Glucose + fructose - Correct answer-During the non-reducing sugar test what is
sucrose hydrolysed into?
Alpha - Correct answer-Which type of glucose makes up starch?
amylose and amylopectin - Correct answer-Names of two types of starch
Amylose - Correct answer-Coiled, compact form of starch. Stored easily.
Amylopectin - Correct answer-Branched form of starch. More easily hydrolysed.
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,surface area - Correct answer-Branched carbohydrates have a higher _____ for
enzymes to work on.
Glycogen - Correct answer-Carbohydrate store in animals
branched - Correct answer-Glycogen is....
metabolic rate - Correct answer-Glycogen is more branched than amylopectin
because animals have a higher _____________
osmotically inactive. - Correct answer-Starch is insoluble and therefore ....
Beta - Correct answer-What type of glucose is cellulose made from?
Alpha and beta glucose - Correct answer-H and OH swapped on Carbon 1.
Fibrils - Correct answer-Cellulose forms long chains called...
H bonds - Correct answer-Cellulose molecules are crosslinked by
strength - Correct answer-Cross linking of cellulose molecules gives them...
Triglycerides - Correct answer-_______ are a good source of energy because they
have a high ratio of energy-storing carbon-hydrogen bonds
what are the roles of lipids? - Correct answer-1. source of energy
2. waterproofing
3. insulation
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, 4. protection
how does the structure of phospholipids relate to their properties? - Correct
answer-1. polar, therefore will position itself to form a bilayer
2. the structure allows them to form glycolipids by combining with carbohydrates
within the cell-surface membrane. these are important in cell recognition.
draw the structure of an amino acid - Correct answer-
draw how a dipeptide forms - Correct answer-
what is meant by 'primary sequence' of a protein - Correct answer-The unique
sequence of amino acids that make up a protein or polypeptide chain
what is meant by 'secondary sequence' of a protein - Correct answer-The way in
which the primary structure of a polypeptide chain folds e.g. alpha helix or beta
pleated sheets. shape is held by H bonds.
what is meant by 'tertiary sequence' of a protein - Correct answer-This is the
overall 3-D structure of the protein.
The shape of the protein is held together by H bonds and ionic bonds and disulfide
bridges.
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Questions and Answers
Benedict's test - Correct answer-Which food test is heated in a water bath?
Sucrose - Correct answer-Which disaccharide is not a reducing sugar?
Test for non-reducing sugars - Correct answer-Add acid. Neutralise. Add
Benedicts. Heat.
Hydrolysis - Correct answer-Reaction performed by dilute HCl in the non reducing
sugar test.
Glucose + fructose - Correct answer-During the non-reducing sugar test what is
sucrose hydrolysed into?
Alpha - Correct answer-Which type of glucose makes up starch?
amylose and amylopectin - Correct answer-Names of two types of starch
Amylose - Correct answer-Coiled, compact form of starch. Stored easily.
Amylopectin - Correct answer-Branched form of starch. More easily hydrolysed.
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,surface area - Correct answer-Branched carbohydrates have a higher _____ for
enzymes to work on.
Glycogen - Correct answer-Carbohydrate store in animals
branched - Correct answer-Glycogen is....
metabolic rate - Correct answer-Glycogen is more branched than amylopectin
because animals have a higher _____________
osmotically inactive. - Correct answer-Starch is insoluble and therefore ....
Beta - Correct answer-What type of glucose is cellulose made from?
Alpha and beta glucose - Correct answer-H and OH swapped on Carbon 1.
Fibrils - Correct answer-Cellulose forms long chains called...
H bonds - Correct answer-Cellulose molecules are crosslinked by
strength - Correct answer-Cross linking of cellulose molecules gives them...
Triglycerides - Correct answer-_______ are a good source of energy because they
have a high ratio of energy-storing carbon-hydrogen bonds
what are the roles of lipids? - Correct answer-1. source of energy
2. waterproofing
3. insulation
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, 4. protection
how does the structure of phospholipids relate to their properties? - Correct
answer-1. polar, therefore will position itself to form a bilayer
2. the structure allows them to form glycolipids by combining with carbohydrates
within the cell-surface membrane. these are important in cell recognition.
draw the structure of an amino acid - Correct answer-
draw how a dipeptide forms - Correct answer-
what is meant by 'primary sequence' of a protein - Correct answer-The unique
sequence of amino acids that make up a protein or polypeptide chain
what is meant by 'secondary sequence' of a protein - Correct answer-The way in
which the primary structure of a polypeptide chain folds e.g. alpha helix or beta
pleated sheets. shape is held by H bonds.
what is meant by 'tertiary sequence' of a protein - Correct answer-This is the
overall 3-D structure of the protein.
The shape of the protein is held together by H bonds and ionic bonds and disulfide
bridges.
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