2.4 Proteins
Understandings:
• Amino acids are linked together by condensation to form polypeptides.
• There are 20 different amino acids in polypeptides synthesized on ribosomes.
• Amino acids can be linked together in any sequence giving a huge range of possible polypeptides.
• The amino acid sequence of polypeptides is coded for by genes.
• A protein may consist of a single polypeptide or more than one polypeptide linked together.
• The amino acid sequence determines the three-dimensional conformation of a protein.
• Living organisms synthesize many different proteins with a wide range of functions.
• Every individual has a unique proteome.
Applications and skills:
• Application: Rubisco, insulin, immunoglobulins, rhodopsin, collagen and spider silk as examples of the range of protein functions.
• Application: Denaturation of proteins by heat or by deviation of pH from the optimum.
• Skill: Drawing molecular diagrams to show the formation of a peptide bond.
• Amino acids are linked together by condensation to form polypeptides.
• There are 20 different amino acids in polypeptides synthesized on ribosomes.
• Amino acids can be linked together in any sequence giving a huge range of possible polypeptides.
• The amino acid sequence of polypeptides is coded for by genes.
• A protein may consist of a single polypeptide or more than one polypeptide linked together.
• The amino acid sequence determines the three-dimensional conformation of a protein.
• Living organisms synthesize many different proteins with a wide range of functions.
• Every individual has a unique proteome.
Applications and skills:
• Application: Rubisco, insulin, immunoglobulins, rhodopsin, collagen and spider silk as examples of the range of protein functions.
• Application: Denaturation of proteins by heat or by deviation of pH from the optimum.
• Skill: Drawing molecular diagrams to show the formation of a peptide bond.
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