PPT-PROTEINS Proteins are polymers of amino acids referred to as polypeptides.

Each amino acid aa shares a common structure ie an amine NH 2 group an acid group COOH and a central carbon atom bonded to hydrogen and to a side chain R The side chains qualify aas as acidic basic neutral aromatic and sulphurcontaining amino acids. The 20 different amino acids. 7.5.1: Explain the four levels of protein structure, indicating the significance of each level.. Peptide bonds link the amino acids together . Polypeptide with five amino acids. . The 411. Proteins account for more than 50% of the dry mass of most cells. Protein functions include structural support, storage, transport, cellular communications, movement, and defense against foreign substances. Essential idea: Proteins have a very wide range of functions in living organisms.. One of the central ideas in Biology is that structure dictates function. Above you can see insulin in its secondary, tertiary and quaternary structures. Polypeptides vary hugely in the combination and number of amino acids that they are composed from. Even if we consider a single polypeptide it's properties, and hence it's function, would vary greatly depending on it's level of structure. Insulin can exist in all these forms, but the active form, which controls blood glucose levels, is a the tertiary structure.. 2. : Molecular Biology. 2.4 Proteins. Learning objectives. U: amino acids are linked together by condensation to form polypeptides. U: There . are 20 different amino acids in polypeptides synthesized on ribosomes.. https://www.youtube.com/watch?v=hpaki7F4HR0. http. ://www.wisc-online.com/objects/index_tj.asp?objID=AP13304. Cells contain thousands of different proteins, each performing a specific task.. Examples: Enzymes, . Carbohydrates, lipids, proteins, and nucleic acids. Monomers. Glucose. Amino acids. Nucleotides . Fatty acids . Polymers. Carbohydrates . Nucleic acids. Lipids . Proteins . Carbohydrates. The word carbohydrate literally means “watered carbon.”. B.2. Properties of 2-amino acids . (B.2.2). Zwitterion. (dipolar) . amino acids contain both acidic and basic groups in the same molecule . therefore, are . amphoteric. in nature (capable of behaving as acids or bases). Proteins account for more than 50% of the dry mass of most cells. Protein functions include structural support, storage, transport, cellular communications, movement, and defense against foreign substances. Unit objectives:. Identify amino acid classifications based on nutritional use and chemical properties of side chains. Describe the primary, secondary, tertiary and quaternary structures of proteins. Polypeptides . are chains of amino acids linked together by condensation reactions. the main, or only, component in proteins. Some proteins are composed of only one polypeptide chain, while others are made of 2 or more. 2.4 Proteins. IB Biology SFP - Mark . Polko. 2. IB Biology SFP - Mark Polko. Understandings. :. Nature. . of science. 3. IB Biology SFP - Mark Polko. Applications. and . skills. Essential idea:.  Proteins have a very wide range of functions in living organisms. 6. 6.1 Differentiate . between essential amino acids and nonessential amino acids.. 6.2 List . the functions of protein in the body.. 6.3 List . the steps for protein digestion and absorption in the body. . Biocompatibility and Cellular Overview Part 2. Outline . Biocompatibility. Quick overview of cellular interaction. Scale, size, generic animal cell. Nanoscale materials . for biological interaction. Liposomes. 2017. Introducing proteins. Proteins. are a diverse group of large and complex polymer molecules, made up of long chains of . amino acids. .. They have a wide range of biological roles, including:. structural:.