pptx, 2.35 MB
pptx, 2.35 MB
docx, 62.52 KB
docx, 62.52 KB
docx, 14.8 KB
docx, 14.8 KB
docx, 17.87 KB
docx, 17.87 KB

This fully-resourced lesson describes the process of DNA replication and explains how this ensures genetic continuity between generations. Both the detailed PowerPoint and accompanying resources have been designed to cover point 1.5.2 of the AQA A-level Biology specification and also explains why it is known as semi-conservative.

The main focus of this lesson is the roles of DNA helicase in the breaking the hydrogen bonds between nucleotide bases and DNA polymerase in forming the growing nucleotide strands. Students are also introduced to DNA ligase to enable them to understand how this enzyme functions to join the nucleic acid fragments. Time is taken to explain key details, such as the assembly of strands in the 5’-to-3’ direction, so that the continuous manner in which the leading strand is synthesised can be compared against that of the lagging strand. The students are constantly challenged to make links to previous topics such as DNA structure and hydrolysis reactions through a range of exam questions and answers are displayed so that any misconceptions are quickly addressed. The main task of the lesson asks the students to use the information provided in the lesson to order the sequence of events in DNA replication before discussing how the presence of a conserved strand and a newly built strand in each new DNA molecule shows that it is semi-conservative.

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A bundle is a package of resources grouped together to teach a particular topic, or a series of lessons, in one place.

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Topic 1: Biological molecules (AQA A-level Biology)

The biological molecules topic is incredibly important, not just because it is found at the start of the course, but also because of its detailed content which must be well understood to promote success with the other 7 AQA A-level Biology topics. Many hours of intricate planning has gone into the design of all of the 20 lessons that are included in this bundle to ensure that the content is covered in detail, understanding is constantly checked and misconceptions addressed and that engagement is high. This is achieved through the wide variety of tasks in the PowerPoints and accompanying worksheets which include exam-style questions with clear answers, discussion points, differentiated tasks and quick quiz competitions. The following specification points are covered by the lessons within this bundle: * Monomers and polymers * Condensation and hydrolysis reactions * Common monosaccharides * Maltose, sucrose and lactose * The structure and functions of glycogen, starch and cellulose * Biochemical tests using Benedict's solution for reducing sugars and non-reducing sugars and iodine/potassium iodide for starch * The structure and properties of triglycerides and phospholipids * The emulsion test for lipids * The structure of amino acids * The formation of dipeptides and polypeptides * The levels of protein structure * The biuret test for proteins * Enzymes act as biological catalysts * The induced-fit model of enzyme action * The properties of an enzyme * The effect of temperature on the rate of an enzyme-controlled reaction * The effect of enzyme and substrate concentration on the rate of an enzyme-controlled reaction * The effect of competitive and non-competitive inhibitors on the rate of an enzyme-controlled reaction * The structure of DNA and RNA * The semi-conservative replication of DNA * ATP as the universal energy currency * The properties of water and its importance in Biology * Inorganic ions Due to the detail of each of these lessons, it is estimated that it will take in excess of 2 months of allocated teaching time to cover the content. If you would like to see the quality of the lessons, download the monomers and polymers, polysaccharides, triglycerides, dipeptides and polypeptides and inorganic ions lessons as these have been shared for free

£24.50

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