Protein structure

Which of the following describes the secondary structure of proteins?

• The sequence of amino acids

• The α-helix and β-pleated sheet folding

• The folding of the polypeptide chain due to the 'R' groups

• The joining of different protein molecules to make one big molecule

What is one of the functions of a protein?

• cell energy

• enzymes

• long term energy storage

• contain genetic information

The name of the initial chain of monomers in a protein is called.....

• polypeptide
• polysaccharide
• polyester
• polynucleotide

Why is folding so important in proteins?

• It gives them a unique, functional shape

• It makes them look tidier

• It makes every protein molecule different from the next even if they are the same type

• The folding is random so is not that important at all

The main bonding in the secondary structure of a protein is due to.....

• covalent bonding

• ionic bonding

• hydrogen bonding

• polar bonding

What gives a protein its unique shape?

• the unique sequence of amino acids in its polypeptide chain

• the unique folding due to the sequence of amnio acids in the polypeptide chain

• hydrogen bonding & unique interactions between the 'R' groups

• all of these

The chain of amino acids folds and coils on itself

• Primary

• Secondary

• Tertiary

• Quaternary

The entire polypeptide forms a three-dimensional structure

• Primary

• Secondary

• Tertiary

• Quaternary

Two or more polypeptides attached together and work as one unit

• Primary

• Secondary

• Tertiary

• Quaternary

What is a peptide bond?

• Bond that holds two amino acids together.
• A bond that holds hydrogen and oxygen molecules together.
• A bond that holds the phosphate group of one nucleotide and a sugar of a neighboring nucleotide.
• A bond that is formed by the sharing of electrons.