What this topic covers
Biological molecules has 8 subtopics, including:
- Monomers and polymers
- Carbohydrates
- Lipids
- Proteins
- Nucleic acids are important information-carrying molecules
- ATP
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AS Level AQA Biology · Topic 1 of 4
Biological molecules – AS Level AQA Biology revision notes
Choose a subtopic. Biological molecules covers Monomers and polymers, Carbohydrates, Lipids, and Proteins in AS Level AQA Biology. 24 lessons in 8 subtopics.
Revise Biological molecules for AS Level AQA Biology, including Monomers and polymers, Carbohydrates, Lipids, and Proteins. 24 lessons across 8 subtopics.
24
Lessons
8
Subtopics
Biological molecules lessons by subtopic
24 lessons, grouped by subtopic.
Monomers and polymers
Carbohydrates
- Monosaccharides and Disaccharides
- Polysaccharides: Structure and Function
- Testing for Sugars and Starch
Lipids
Proteins
- Amino Acids, Dipeptides, and Polypeptides
- Protein Structure and Function
- The Biuret Test for Proteins
- Enzyme Action: Specificity and Mechanisms
- Factors Affecting Enzyme Activity
Nucleic acids are important information-carrying molecules
- Nucleotide Structure: DNA vs RNA
- DNA and RNA: Structure, Bonding, and Function
- Unwinding and Preparing DNA for Replication
- Building New DNA Strands
- Semi-Conservative Replication and its Validation
ATP
Water
Inorganic ions
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Frequently asked questions
What is Biological molecules?
Biological molecules covers Monomers and polymers, Carbohydrates, Lipids, and Proteins in AS Level AQA Biology. 24 lessons in 8 subtopics.
What is a polypeptide?
A polypeptide is a chain formed by the condensation of many amino acids joined by peptide bonds. The Amino Acids, Dipeptides, and Polypeptides notes cover this in full.
What is lactose intolerance?
Lactose intolerance is experienced by individuals who do not produce sufficient lactase, the enzyme needed to hydrolyse lactose. The Monosaccharides and Disaccharides notes cover this in full.
What is the general structure of an amino acid?
An amino acid has a central carbon atom bonded to an amine group (-NH2), a carboxyl group (-COOH), a hydrogen atom and a variable R group, or side chain. The Amino Acids, Dipeptides, and Polypeptides notes cover this in full.
What is a polymer?
A polymer is a large molecule made from a large number of monomers joined together by covalent bonds. The Monomers, Polymers, and Life's Biochemical Basis notes cover this in full.
What is the test for starch?
The test for starch is to add 2–3 drops of iodine/potassium iodide solution to the sample. The Testing for Sugars and Starch notes cover this in full.
What is the structure of ATP?
ATP (adenosine triphosphate) is a nucleotide derivative made of three components: the pentose sugar ribose, the nitrogenous base adenine and three phosphate groups arranged in a chain. The ATP: Structure and Hydrolysis notes cover this in full.
What is the difference between saturated and unsaturated fatty acids?
Saturated fatty acids have only single C-C bonds in their R-group and the maximum number of hydrogen atoms, giving a straight chain. The Introduction to Lipids: Triglycerides notes cover this in full.
How is a phosphodiester bond formed?
A phosphodiester bond forms by a condensation reaction between the phosphate group of one nucleotide and the 3'-OH group of the pentose sugar of the preceding nucleotide, releasing a water molecule. The DNA and RNA: Structure, Bonding, and Function notes cover this in full.