6. What is the most simplest form of the R-group?
- H
- O
- CO
7. What kind of reaction produces the peptide bond?
- Condensation reaction
- Hydrolysis reaction
8. What is the primary structure of a protein?
- The primary structure of a protein is given by the specific sequence of amino acids that make up the protein.
- The primary structure refers to coiling and pleating parts of the polypeptide molecule.
9. Enzymes that catalyze the breaking of peptide bonds are know as ______________.
- Catalysts
- Protease enzymes
- Protein enzymes
10. What is the secondary structure?
- The secondary structure is formed when the chain of amino acid coils or folds to form an alpha helix or a beta pleated sheet. Hydrogen bonds hold the coils in place.
- The secondary structure is the sequence of amino acids in a protein.
11. What is the tertiary structure?
- The tertiary structure is the coiling and pleating of amino acids to form an alpha helix or beta pleated sheet.
- The tertiary structure is the final three dimensional shape of a protein is formed when these coils and pleats themselves coil or fold. This 3D shape is held in place by a number of different types of bonds and interactions.
- The tertiary structure is the sequence of amino acids in a protein.
12. An enzyme must have an ________, the shape of which is ____________ to that of its __________.
- Passive site, the same, substrate
- Active site, complementary, substrate
- Active site, the same, substrate
13. Heating a protein increases the kinetic.This causes the molecule to vibrate,most bonds are quite weak so easily broken. Whole tertiary structure can unravel and protein will no longer function. This is called?
- Denaturation
- Hydrolysis
- Tertiary structure breakage.
14. Globular proteins tend to roll up into a compact GLOBE. Any hydrophobic R-groups are turned inwards, while hydrophilic R-groups tend to be on the outside. This makes the proteins water-soluble, because water molecules can easily cluster around them.
- True
- False
15. Fibrous proteins form FIBRES. Most have regular, repetitive sequences of amino acids and are usually insoluble in water.
- True
- False
16. Fibrous proteins usually have structural roles while Globular usually have...
- Energy source roles
- Metabolic roles
- Storage roles
17. An example of a globular protein is ...?
- Enzymes found in all organisms. Plasma proteins and antibodies found in the blood of mammals.
- Collagen found in the bone and cartilage. Keratin found in fingernails and hair.
18. An example of a fibrous protein is?
- Collagen found in bone and cartilage. Keratin found in fingernails and hair.
- Enzymes found in all organisms. Plasma proteins and antibodies found in the blood of mammals.
19. Tertiary structure in proteins is stabilised by a number of bonds such as...?
- Disulfide bonds, Ionic bonds, Hydrogen bonds, Glycosidic bonds
- Disulfide bonds, Ionic bonds, Hydrogen bonds, Hydrophobic and hydrophilic interactions.
- Disulfide bonds, Ionic bonds, Covalent bonds and hydrophobic and hydrophilic interactions
20. What is the quaternary structure?
- Quaternary structure refers to the fact that some proteins are made up of more than one polypeptide subunit joined together, or polypeptide and an inorganic component.
- Quaternary structure is the sequence of amino acids in a protein.
- Quaternary structure refers to the coils and pleats of amino acids into a alpha helix or beta pleated structure.
