This lesson covers the differences between structural and regulatory genes, and repressible and inducible enzymes. It progresses to cover genetic control protein production in prokaryotes using the lac operon , and the to describe and explain the use of transcription factors in plants.

This lesson recalls Darwin’s Theory of Evolution and discusses how DNA sequences can be used to show evolutionary relationships between species. The lesson then looks at how speciation occurs as a result of Allopatric speciation and Sympatric speciation.

This lesson starts with a recall KS4 chromosome structure. The lesson then progresses into the structure and functions of: DNA; Histones; Chromatids; Centromeres, and Telomeres.

This lesson is the class practical outlined in the CIE specification. The lesson starts by recalling how to calculate surface area and volume, calculating surface area to volume ratios and then the Investigation into diffusion in different sized cells using agar blocks. The lesson concludes by explaining the relationship between cell size and diffusion rate.

This lesson starts by recalling the definition of osmosis and the structure of the cell membrane. The lesson then covers passive transport, active transport, endocytosis and exocytosis and explains the use of carrier and channel proteins in cell membranes.

This less starts with a recall the structure of cell membranes and then progresses into how the fluid mosaic model of membrane structure is used to explain the structure and properties of cell membranes. Later the lesson looks at how the components of the membrane contribute to it´s physical and chemical properties. All resources included.

This lesson starts by reviewing the role of the musculoskeletal system and the roles of the skeleton, tendons, ligaments and muscles to bring about movement. Antagonistic muscles and the three types of muscle are also explained, then focusing on straited muscle. Structure of the muscle cell following with details of the myofibrils, T-tubles and sacoplasmic reticulum (covered in more detail in the next lesson. The lesson concludes with an introduction to the roles of actin and myosin, in preparation for the sliding filament theory (next lesson). ).

This lesson revisits the role of chemoreceptors in the tongue and then progresses into how resting potential is maintained until a stimulus reaches threshold. The lesson introduces the membrane sodium potassium pump using active transport and the voltage gated channels using facilitated diffusion. There are videos included and a short quiz as a plenary.

This lesson starts be recalling differences between hormonal and nervous control then revisits KS4 learning on the neurone and the CNS. Sensory, relay and motor neurones are covered, including the finer ultrastructures. All resources included.

This lesson starts with recall of how resting potential is maintained and the functions of the sodium potassium pump and voltage gated channels. The lesson then progresses into the the generation of an AP and the all or nothing response. Repolarisation and hyperpolarisation is covered. PPT is visual and includes videos to embed concepts. All resources are included in the PPT.

This lesson starts with a review of resting and action potential and then progresses into how the impulse moves along the axon using saltatory conduction. Later, factors affecting speed of transmission is covered using diagrams and videos. All resources included.

This lesson starts by recalling the role of receptor cells and then looks at the structure of chemoreceptors on the tongue. The lesson progresses into how an action potential is generated following salt detection. A lot of visuals to embed understanding.

A sort lesson outlining two methods for testing blood sugar concentrations: Urine dipsticks and blood biosensors.

This lesson starts with a review of different glands, their hormones and roles that they have in cell communication. The first learning episode looks at the principles of cell signaling and then uses insulin as a worked example. There is a practise exam question included and resources for the starter activity.

This lesson reviews KS4 learning on limiting factors then progresses into the higher level concepts using their learning on the LDR and ILR.

This lesson provides guidance for AS students to complete all food testing including extra help with the non-reducing sugar test. Consolidation exam questions are also included.

This lesson provides students with the opportunity to analyse the relationship two variables and how biotic and abiotic factors affect distribution and abundance of species. Fill worked examples of Pearson’s Linear Correlation included.

This lesson starts with a recall of the structure of phloem tubes and their companion cells. Students then learn of the process of translocation from source to sink. Finally, the lesson covers why some parts of the plant may be a source and sink at different times of the year. Fully resourced, exam questions included.

In this lesson, students learn about transpiration in terms of water potential how water moves from the soil through a plant and into the air. They learn of the three pathways by which water is transported from soil to xylem and the three mechanisms by which water is moved from roots to leaves. Exam questions included.