Final answer:
Proteins' structure and function are determined by distinct levels of organization, which can be disrupted, leading to ineffective protein functions. The DNA sequence determines a protein's structure through the encoding of amino acid sequences.
Explanation:
The levels of organization that determine the shape and function of a protein:
- Primary structure: The sequence of amino acids.
- Secondary structure: Regular repeating patterns like alpha helices or beta sheets.
- Tertiary structure: Overall 3D shape of the protein.
- Quaternary structure: Interaction between multiple protein subunits.
A protein's functions can become ineffective due to:
- Denaturation caused by changes in temperature or pH.
- Changes in the protein's structure affecting its active site.
- Mutations altering the protein's sequence leading to loss of function.
- How DNA determines a protein's structure:
- The sequence of nucleotides in the gene (DNA) encodes the sequence of amino acids, which dictates the protein's primary structure and ultimately, its function.
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