Biology

Biology

Biological molecules, cells, organisms and ecosystems

Resources›A Level›Biology

Biological Molecules & Cells

6 topics

Biological Molecules

AS

Monomers, polymers, carbohydrates, lipids, proteins, nucleic acids

carbohydrateslipidsproteins+3

Water and Inorganic Ions

AS

Properties of water, role of inorganic ions in biological processes

waterhydrogen bondinginorganic ions+2

Cell Structure

AS

Prokaryotic and eukaryotic cells, organelles, microscopy

prokaryoteseukaryotesorganelles+2

Cell Membranes

AS

Membrane structure, transport across membranes, osmosis, diffusion

phospholipid bilayerosmosisdiffusion+2

Cell Division

AS

Cell cycle, mitosis, meiosis, chromosome behaviour

mitosismeiosiscell cycle+2

Cell Diversity and Organisation

AS

Differentiation, specialisation, tissues, organs, organ systems

differentiationspecialisationtissues+2

Organisms & Ecosystems

12 topics

Exchange Surfaces

AS

Gas exchange in insects, fish, mammals, plants

gas exchangealveoligills+2

Transport in Animals

AS

Circulatory systems, heart, blood vessels, blood

heartblood vesselshaemoglobin+2

Transport in Plants

AS

Xylem, phloem, transpiration, translocation

xylemphloemtranspiration+2

Photosynthesis

A2

Light-dependent and light-independent reactions, limiting factors

photosynthesischloroplastsCalvin cycle+2

Respiration

A2

Glycolysis, Krebs cycle, oxidative phosphorylation

respirationglycolysisKrebs cycle+2

Energy and Ecosystems

A2

Energy transfer, food chains, nutrient cycles

energy transferfood chainspyramids+2

Stimuli and Response

A2

Receptors, neurones, reflex arc, nervous system

receptorsneuronesreflex+2

Nervous Coordination

A2

Action potentials, synapses, neurotransmitters

action potentialsynapseneurotransmitter+2

Skeletal Muscles

A2

Muscle structure, contraction, neuromuscular junction

musclesarcomeresliding filament+2

Homeostasis

A2

Negative feedback, thermoregulation, glucose regulation

homeostasisnegative feedbackthermoregulation+2

Biodiversity

A2

Classification, species diversity, investigating diversity

classificationspeciesbiodiversity+2

Populations in Ecosystems

A2

Population size, succession, conservation

populationsuccessionconservation+2

Genetics & Gene Expression

6 topics

DNA, Genes and Protein Synthesis

A2

DNA structure, replication, transcription, translation

DNAgenesreplication+3

Genetic Diversity

A2

Mutations, meiosis, variation, genetic diversity

mutationsmeiosisgenetic diversity+2

Inheritance

A2

Monohybrid and dihybrid crosses, linkage, epistasis

inheritancePunnett squareslinkage+2

Populations and Evolution

A2

Hardy-Weinberg, selection, speciation, genetic drift

Hardy-Weinbergnatural selectionspeciation+2

Control of Gene Expression

A2

Transcription factors, epigenetics, gene regulation

gene expressiontranscription factorsepigenetics+2

Recombinant DNA Technology

A2

Gene cloning, PCR, genetic engineering, gene therapy

genetic engineeringPCRgene cloning+2