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Science teacher. Biology specialist with 22 years of experience teaching A level.

Science teacher. Biology specialist with 22 years of experience teaching A level.
Introduction to biological molecules. AQA AS 3.1.1
bg1974

Introduction to biological molecules. AQA AS 3.1.1

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An introduction to the new 2015 AQA A level biology. This lesson includes explanations of the key words monomers, polymers and polymerisation. Types of chemical bonds, condensation and hydrolysis and Mole and molar solutions with worked examples.
Structure and Contraction of Skeletal Muscle. AQA A2 Biology 3.6.3
bg1974

Structure and Contraction of Skeletal Muscle. AQA A2 Biology 3.6.3

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The lesson covers the following learning outcomes: Be able to describe the gross and microscopic structures of a skeletal muscle. Describe and label the arrangement of actin and myosin within a myofibril. Describe the main properties of slow and fast twitch fibres. List the differences between slow and fast twitch fibres Describe how the sliding filament theory of muscle contraction cause muscle to contract and relax. Summarise the evidence that supports the sliding filament theory. Describe the cross bridge cycle. State where the energy for muscle contraction comes from. Please visit my shop where I will be regularly adding new powerpoints to cover the NEW (2015) AS and A2 AQA Biology spec.
Enzyme action - AQA AS 3.1.4.2
bg1974

Enzyme action - AQA AS 3.1.4.2

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This presentation covers the new AQA specification 3.1.4.2. Enzyme action, Model of enzyme action and the induced fit vs lock and key model. Includes starter activity, learning outcomes, specification reference, diagrams and animations, notes and exam question plenary.
Predation. 3.7.4. AQA. A2
bg1974

Predation. 3.7.4. AQA. A2

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Predator prey relationship. Cyclic fluctuations in population size. Examples of predator prey relationships. Also, includes, starter, summary questions, exam question, mark scheme and crossword plenary. Originally made for A2 class but can be easily adapted for a GCSE class.
Competition. AQA A2 3.7.4
bg1974

Competition. AQA A2 3.7.4

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Competition. Factors organisms compete for. Intraspecific and interspecific competition with examples. Includes a starter and exam question with mark scheme.
Factors affecting enzyme action AQA AS 3.1.4.2
bg1974

Factors affecting enzyme action AQA AS 3.1.4.2

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This lesson covers the theory behind factors affecting enzyme action. Temperature, concentration and pH and how they affect enzymes. There is an explanation of how to measure rates of reaction from a graph and how to go about explaining the shape of enzyme controlled reaction graphs.