14Proteins Amino AcidsMedium1 mark
Which row about the primary structure, secondary structure and quaternary structure of proteins is correct?
| primary structure | secondary structure | quaternary structure | |
|---|---|---|---|
| A | the sequence of amino acids in a protein coded by a DNA molecule | the result of attraction between hydrogen and oxygen atoms associated with the peptide bonds | formed by the linking together of more than one polypeptide to form a protein |
| B | the sequence of amino acids that is determined by the codon sequence of an mRNA molecule | the coiling of a chain of amino acids to form a -pleated sheet or -helix | always contains at least two different types of polypeptide that interact to form the shape of a protein |
| C | the result of translation of an mRNA molecule by a ribosome into a chain of amino acids | formed by hydrogen bonding between the R-groups of the amino acids that form the primary structure | formed by four polypeptides and an additional reactive group attached to the protein |
| D | the number of amino acids present in a protein | the left-handed spiral formed by the primary structure | formed by two or more subunit polypeptides that link together to form a protein |