Question

Select the true statements about protein secondary structure.

a-The secondary level of protein structure refers to the spatial arrangements of short segments of the protein.
b-Peptide bonds stabilize secondary structure.
c-In a Beta-pleated sheet, the side chains extend above and below the sheet.
d-In an a-helix, the side chains are located inside the helix.
e-The alpha-pleated sheet is held together by hydrogen bonds between adjacent segments.

Answer 1

The true statements about protein secondary structure include the spatial organization of short segments, hydrogen bonds stabilization, and side chains extending above and below the beta-pleated sheet.

Step-by-step explanation:

Among the given statements about protein secondary structure, the following are true:

• The secondary level of protein structure refers to the spatial arrangements of short segments of the protein.
• In a Beta-pleated sheet, the side chains extend above and below the sheet.
• Hydrogen bonds stabilize secondary structure.

The secondary structure includes organized regions like the alpha-helix and beta-pleated sheet, both held together by hydrogen bonds occurring along the peptide backbone. In an alpha-helix, the side chains extend outward from the helix, not inside. There is no alpha-pleated sheet, it is an incorrect term; the correct term is beta-pleated sheet.