- a protein is the specific sequence of the amino acids in a polypeptide. A single change in primary structure can significantly change the shape of a polypeptide. - The order and arrangement of amino acids within a polypeptide chain determines the shape of a protein.

- a protein is the regular pattern of local hydrogen bonding within the polypeptide chain. Examples of secondary structure within a polypeptide include the alpha helix and beta pleated sheet.

- Proteins are macromolecules that do much of the work of the cell. - The shape of a protein determines its function. The order and arrangement of amino acids within a polypeptide chain determine the shape of a protein. RNA, in turn, instructs the amino acids to bond in a particular sequence.

- one type of secondary structure. The polypeptide twists into a helix that is supported by hydrogen bonds between the amine group hydrogen and the carboxyl oxygen.

- another type of secondary structure. It is formed when the polypeptide chain folds, placing two chains next to each other. Hydrogen bonding occurs between the chains, forming a sheet-like region within the polypeptide

Which statement regarding the secondary structure of a protein is correct? a. It is maintained by disulfide bonds between cysteine molecules. b. It may be in either the alpha-helix or the beta-pleated sheet configuration. c. It is destroyed if the protein is placed in an atmosphere of 21% oxygen and 78% nitrogen. d. It refers to the manner in which two polypeptides coil and wrap around each other.

- b. It may be in either the alpha-helix or the beta-pleated sheet configuration

Two major types of secondary structure found in proteins are

- α-helices and β-pleated sheets

Which statement about the primary structure of a protein is not true? a. The primary structure of a protein determines the corresponding secondary structure. b. The primary structure of a protein is determined by the nucleotide sequence of the corresponding gene. c. The primary structure of a protein is determined by hydrogen bonding. d. The primary structure of a protein is the sequence of amino acids in that protein.

- c. The primary structure of a protein is determined by hydrogen bonding

Primary structure describes

- the order of amino acids in a protein

The secondary structure of a protein

- is influenced by hydrogen bonding - can assume an alpha-helix or beta-pleated sheet formation

2.7.3 Primary and Secondary Structure Flashcards by Irina Soloshenko

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2.7.3 Primary and Secondary Structure Flashcards

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