Question

question 10
for each of the statements below, determine whether they apply best to primary, secondary, tertiary or quaternary structure.
it is the number of a - helices and b - pleated sheets in the complete protein
it is the sequence of amino acids in the complete protein.
results from the covalent and non - covalent interactions between side chains within one polypeptide chain
results from the covalent and non - covalent interactions between 2 different polypeptide chains
it results primarily from local interactions between backbone atoms.

Explanation:

1. The number of α - helices and β - pleated sheets is characteristic of secondary structure as these are the local, repetitive structures formed by the polypeptide backbone.
2. The sequence of amino acids is the primary structure which is the linear order of amino - acids in a protein.
3. Tertiary structure results from covalent and non - covalent interactions between side chains within a single polypeptide chain, giving the protein its three - dimensional shape.
4. Quaternary structure involves interactions between different polypeptide chains in a multi - subunit protein.
5. Local interactions between backbone atoms primarily contribute to secondary structure, not primary structure. The last statement is incorrect as written in the original.

Answer:

1. Secondary Structure
2. Primary Structure
3. Tertiary Structure
4. Quaternary Structure
5. Secondary Structure (corrected from the incorrect Primary Structure in the original)