What are the four basic levels of organization of a protein?

Answer 1

Levels of Protein structure:

1. Primary: refers to the unique sequence of amino acids in the protein. All proteins have a special sequence of amino acids, this sequence is derived from the cell's DNA.

2. Secondary : the coiling or bending of the polypeptide into sheets is referred to the proteins secondary structure. alpha helix or a beta pleated sheet are the basic forms of this level. They can exist separately or jointly in a protein.

3. Tertiary: The folding back of a molecule upon itself and held together by disulfide bridges and hydrogen bonds. This adds to the proteins stability.

4. Quaternary: Complex structure formed by the interaction of 2 or more polypeptide chains.

Answer 2

The four basic levels of organization of a protein are primary structure (sequence of amino acids), secondary structure (local folding patterns like alpha helices and beta sheets), tertiary structure (overall 3D arrangement of the protein), and quaternary structure (arrangement of multiple protein subunits if applicable).

Answer 3

• Primary_structure: the Peptide_sequence.
• Secondary_structure: regularly repeating local structures stabilized by Hydrogen_bond. The most common examples are the Alpha_helix, Beta_sheetand Turn_(biochemistry). Because secondary structures are local, many regions of different secondary structure can be present in the same protein molecule.
• Tertiary_structure: the overall shape of a single protein molecule; the spatial relationship of the secondary structures to one another. Tertiary structure is generally stabilized by nonlocal interactions, most commonly the formation of a Hydrophobic_core, but also through Salt_bridge_(protein), hydrogen bonds, Disulfide_bond, and even Post-translational_modification. The term "tertiary structure" is often used as synonymous with the term fold. The Tertiary structure is what controls the basic function of the protein.
• Quaternary_structure: the structure formed by several protein molecules (polypeptide chains), usually called Protein_subunitin this context, which function as a single Protein_complex.

Answer 4

1. Primary - the sequence of amino acids

2. Secondary - the local structures (such as coils and loops - mainly caused by H-bonds)

3. Tertiary - the 3D structure of the protein

4. Quaternary - when more than one polypeptide chain is joined to make a complex protein

Answer 5

primary structure-sequence of amino acid linked

secondary structure-folding of amino acids to stabilize the sequence(alpha-helix or beta-pleated)

tertiary structure-spatial arrangement of protein

quaternary structure-how two or more proteins are spatially oriented.

Answer 6

There are an unlimited number of levels of organization in the world. Most people choose to use a 3 or 5 level chart.

Answer 7

There are 4 levels of protein structure

Answer 8

3