Part E - Protein Overview Proteins account for over 50% of the organic matter in the body, and they have the most varied functions of any macromolecules. In order to be functional, each protein must reach a three-dimensional level of structural organization cases, several three-dimensional proteins must interact with one another to perform their individual functions. Match the level of protein folding on the left and features of each on the diagram. ? View Available Hint(s) Alpha-helix Levels of Organizatio Beta-pleated sheet Group 2 Group 1 Group 1 Protein Amino acids Group 2 Hydrogen bonds Group 1 Polypeptide subunit Group 1 Secondary structure Group 2 Group 1 Quaternary Reset Help
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Proteins need the correct sequence of amino acids and a distinct shape to function properly: • Compare the levels of protein structure (shape) below • Describe the shape of the structure • Give examples of substances that display each main protein shape LEVEL OF PROTEIN STRUCTURE | DESCRIPTION OF PROTEIN SHAPE | EXAMPLES OF SUBSTANCES PRIMARY | Amino acid sequence | SECONDARY | Portions of chain form helices or pleated sheets | TERTIARY | Overall three-dimensional shape of interacting secondary structures. | QUATERNARY | More than one polypeptide chain interacting. |
Josee P.
Part A Complete the following vocabulary exercise relating to the level of structure in proteins. Match the words in the left-hand column with the appropriate blank in the sentences in the right-hand column. 1. structure is the sequence of amino acids in a protein. 2. structure is the result of two or more protein subunits assembling to form a larger, biologically active protein complex. 3. structure describes the alpha-helices and beta-sheets that are formed by hydrogen bonding between backbone atoms located near each other in the polypeptide chain. 4. structure is achieved when a protein folds into a compact, three-dimensional shape stabilized by interactions between side-chain R groups of amino acids.
Sri K.
Each description below at left represents a possible major basis for a particular level of protein structure. Match each of these descriptions with the correct protein structural level, by selecting from the drop-down menus (not all options will be used, but those that are will be used only once): [ Choose ] quaternary structure secondary structure tertiary structure resonance within the peptide group presence of residues with aliphatic and aromatic side chains in the primary sequence of a single polypeptide
Dominador T.
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