Question

Which of

the following statements is accurate regarding these protein structures?
Select one or more:
A.The most common secondary protein
structures are the alpha-helix and the beta-pleated sheet which are held in place by
hydrogen bonding. B. Interactions between the R groups in the amino C.The two types of primary structure both involve the protein consisting of more than one chained subunit.
D.proteins in tertiary structure consist of a simple polypeptide chain.

Answer 1

Statement A is correct as it identifies alpha-helix and beta-pleated sheet as common secondary protein structures held together by hydrogen bonding. Statements C and D have inaccuracies regarding primary and tertiary structures of proteins.

Step-by-step explanation:

The question relates to the accuracy of statements regarding protein structures. Analyzing the provided options:

• Statement A is correct, as it correctly identifies alpha-helix and beta-pleated sheet as the most common secondary protein structures, and they are indeed stabilized by hydrogen bonding.
• Statement B, which is incomplete in the question, seems to allude to interactions between R groups, which generally relate to tertiary structure rather than secondary.
• Statement C is incorrect as primary structure refers to the specific amino acid sequence in a polypeptide chain and does not involve subunits.
• Statement D describing tertiary structure is partly true; a tertiary structure can consist of a single polypeptide chain, but it is not always simple due to its complex folding.