AQA AS & A (7401, 7402) Biology

Here you will find all AQA AS & A-Level Biology Periodicity questions to revise by topic and exam board

3.1 Biological molecules

Monomers and polymers

Carbohydrates

Lipids

Proteins

Structure of DNA and RNA

ATP

Water

Inorganic ions

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3.2 Cells

Cell structure

All cells arise from other cells

Transport across cell membranes

Cell recognition and the immune system

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3.3 Organisms exchange substances with their environment

Surface area to volume ratio

Gas exchange

Digestion and absorption

Mass transport

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3.4 Genetic information, variation and relationships between organisms

DNA, genes and chromosomes

DNA and protein synthesis

Genetic Diversity via Mutation

Genetic diversity and adaptation

Species and taxonomy

Investigating diversity

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3.5 Energy transfers in and between organisms (A-level only)

Photosynthesis

Respiration

Energy and ecosystems

Nutrient cycles

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3.6 Organisms respond to changes in their internal and external environments (A-level only)

Survival and response

Nervous coordination

Skeletal muscles are stimulated to contract by nerves and act as effectors

Homeostasis is the maintenance of a stable internal environmen

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3.7 Genetics, populations, evolution and ecosystems

Inheritance

Populations

Evolution may lead to speciation

Populations in ecosystems

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3.8 The control of gene expression

Alteration of the sequence of bases in DNA can alter the structure of proteins

Gene expression is controlled by a number of features

Using genome projects

Recombinant DNA technology

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