This lesson describes the processes that take place during interphase, mitosis and cytokinesis and outlines how checkpoints regulate the cell cycle. The PowerPoint and accompanying resources have been designed to cover points 2.1.6 (a & b) of the OCR A-level Biology specification and prepares the students for the upcoming lessons on the main stages of mitosis and its significance in life cycles
The students were introduced to the cell cycle at GCSE so this lesson has been planned to build on that knowledge and to emphasise that the M phase which includes mitosis (nuclear division) only occupies a small part of the cycle. The students will learn that interphase is the main stage and that this is split into three phases, G1, S and G2. A range of tasks which include exam-style questions, guided discussion points and quick quiz competitions are used to introduce key terms and values and to describe the main processes that occur in a very specific order. There is also a focus on the checkpoints, such as the restriction point that occurs before the S phase to ensure that the cell is ready for DNA replication. Extra time is taken to ensure that key terminology is included and understood, such as sister chromatid and centromere, and this focus helps to show how it is possible for genetically identical daughter cells to be formed at the end of the cycle. Important details of mitosis are introduced so students are ready for the next lesson, before the differences in cytokinesis in animal and plant cells are described.
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Enzymes, biological membranes & cell division (OCR A-level Biology A)
This lesson bundle has been formed from the 13 detailed lesson PowerPoints and their accompanying resources that have been uploaded to cover a lot of the content in modules 2.1.4, 2.1.5 and 2.1.6 of the OCR A-level Biology A specification. Each lesson contains a wide range of tasks, which include exam-style questions (with mark schemes), guided discussion points, and quick quiz competitions, that will engage and motivate the students whilst covering the following specification points: Module 2.1.4: Enzymes * The role of enzymes in catalysing reactions that affect metabolism at a cellular and whole organism level * The role of enzymes in catalysing both intracellular and extracellular reactions * The mechanism of enzyme action * The effect of pH on enzyme activity * The effect of temperature on enzyme activity * The calculation of the temperature coefficient * The effect of enzyme and substrate concentration on enzyme activity * The need for coenzymes, cofactors and prosthetic groups in some enzyme-controlled reactions Module 2.1.5: Biological membranes * The fluid mosaic model of membrane structure and the roles of its components * Simple and facilitated diffusion as forms of passive transport * Active transport, endocytosis and exocytosis as processes requiring ATP as an immediate source of energy * The movement of water across membranes by osmosis and the effects that solutions of different water potential can have on plant and animal cells Module 2.1.6: Cell division, cell diversity and cellular organisation * The cell cycle * How the cell cycle is regulated * The main stages of mitosis * The significance of mitosis in life cycles * The significance of meiosis in life cycles * The main stages of meiosis * How cells of multicellular organisms are specialised for particular functions * The organisation of cells into tissues, organs and organ systems * The production of erythrocytes and neutrophils from stem cells in bone marrow If you would like to sample the quality of the lessons in this bundle, then download the following lessons as they have been uploaded for free: * The roles of enzymes and mechanism of action * Simple and facilitated diffusion * Cell specialisation and organisation
£20.00
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Module 2.1.6: Cell division, cell diversity and organisation (OCR A-level Biology A)
This lesson bundle contains 4 detailed lesson PowerPoints, which along with their accompanying resources have been designed to cover the majority of the content in module 2.1.6 of the OCR A-level Biology A specification. The lessons have been planned at length and include exam-style questions that will challenge the students on their current understanding, prior knowledge checks to encourage students to make links to previously covered topics, guided discussion points and quick quiz competitions to introduce memorable terms and values. The following specification points are covered by the resources in this bundle: * The cell cycle * How the cell cycle is regulated * The main stages of mitosis * The significance of mitosis in life cycles * The significance of meiosis in life cycles * The main stages of meiosis * How cells of multicellular organisms are specialised for particular functions * The organisation of cells into tissues, organs and organ systems * Stem cells as a renewing source of undifferentiated cells * The production of erythrocytes and neutrophils derived from stem cells in bone marrow If you would like to sample the quality of the lessons in this bundle, then download the cell specialisation and organisation lesson as this has been uploaded for free
£7.00
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