This engaging lesson acts as an introduction to topic 1.3 (proteins) by introducing the general structure of an amino acid. The PowerPoint lesson has been designed to cover point 1.3 (i) as detailed in the Edexcel A-level Biology B specification and provides a clear introduction to the following lesson on the formation of polypeptides, protein structures and globular and fibrous proteins.
The lesson begins with a prior knowledge check, where the students have to use the 1st letters of 4 answers to uncover a key term. This 4-letter key term is gene and the lesson begins with this word because it is important for students to understand that these sequences of bases on DNA determine the specific sequence of amino acids in a polypeptide. Moving forwards, students are given discussion time to work out that there are 64 different DNA triplets and will learn that these encode for the 20 amino acids that are common to all organisms. The main task of the lesson is an observational one, where students are given time to study the displayed formula of 4 amino acids. They are not allowed to draw anything during this time but will be challenged with 3 multiple choice questions at the end. This task has been designed to allow the students to visualise how the 20 amino acids share common features in an amine and an acid group. A quick quiz round introduces the R group and time is taken to explain how the structure of this side chain is the only structural difference, before cysteine is considered in greater detail due to the presence of sulfur atoms. Students are briefly introduced to disulfide bridges so they will recognise how particular bonds form between the R groups in the tertiary structure which is covered in the next lesson. One more quiz round called LINK TO THE FUTURE is used to conclude the lesson and demonstrates the range of roles performed by amino acids in the latter part of the course including translation at the ribosomes.
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Topic 1: Biological molecules (Edexcel A-level Biology B)
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 9 Edexcel A-level Biology B topics. Many hours of intricate planning has gone into the design of all of the 18 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: * The differences between monosaccharides, disaccharides and polysaccharides * The structure of glucose and ribose * The formation of disaccharides and polysaccharides from monosaccharides * The structure of starch, glycogen and cellulose * The synthesis of a triglyceride * The differences between saturated and unsaturated lipids * The relationship between the structure of lipids and their roles * The structure and properties of phospholipids * The structure of an amino acid * The formation of polypeptides and proteins * The role of ionic, hydrogen and disulphide bonding in proteins * The levels of protein structure * The structure of collagen and haemoglobin * The structure of DNA * The semi-conservative replication of DNA * A gene is a sequence of bases on DNA that codes for an amino acid sequence * The structure of mRNA * The structure of tRNA * The process of transcription * The process of translation * Base deletions, insertions and substitutions as gene mutations * The effect of point mutations on amino acid sequences * The structure of enzymes as globular proteins * The concept of specificity and the induced-fit hypothesis * Enzymes are catalysts that reduce activation energy * Understand how temperature affects enzyme activity * Enzymes catalyse a wide range of intracellular reactions as well as extracellular ones * The importance of water for living organisms Due to the detail included in these lessons, it is estimated that it will take in excess of 2 months of allocated A-level teaching time to complete. If you would like to see the quality of the lessons then download the monosaccharides, disaccharides and polysaccharides, glucose and ribose, triglycerides, structure of DNA and transcription lessons as these have been uploaded for free.
£20.00
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Topics 1.1, 1.2 & 1.3: Carbohydrates, Lipids & Proteins (Edexcel A-level Biology B)
Carbohydrates, lipids and proteins are the key biological molecules and the specification points covering the relationship between their structures and functions are found in the very first three topics of Edexcel A-level Biology B course. With this in mind, hours of intricate planning has gone into each of the 9 lessons that are included in this bundle to ensure that students are continually engaged whilst the detailed content is covered by the variety of tasks. These tasks include exam-style questions with accompanying mark schemes so that students can assess their understanding, guided discussion periods and quiz competitions to introduce key values and terminology in a memorable way
£9.00
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