Question

All four statements in the table below might describe the same type of secondary structure in a protein. If they do, check the no errors box under the table, and then write the name of the secondary structure all four statements describe.

But one of the statements might be inconsistent. That is, three of the statements might correctly describe a certain type of structure, and the fourth might say something wrong about that structure. If this is what you find, check the error box next to the statement that doesn't fit.

statement error?
Within it, several strands of the protein backbone are held parallel to each other, like pencils in a box.

The hydrogen bonds that hold it together go between backbone amide and carbonyl groups on two stretches of the protein chain that lie next to each other.

Overall, it has the shape of a soda can.

The specific interactions that hold it together are between atoms on the main chain of the protein, not the atoms in polar or acidic side chains.


No errors. Name of secondary structure described:

Answer 1

The statements in the table all describe the beta-pleated sheet as the secondary structure in a protein.

The statements in the table all describe the same type of secondary structure in a protein, which is the Beta-pleated sheet.

The secondary structure of a protein is a highly regular substructure, and the beta-pleated sheet is formed by alternating rows of amino acids that line up in a side-by-side fashion.

It is held together by hydrogen bonds between the oxygen atom in the carbonyl group of one amino acid and another amino acid that is four amino acids farther along the chain.