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6. ------- can be easily broken if PH or temperature conditions change.
- sulphur bridges
- ionic bond
- hydrogen bond
- peptidebond
7. globular proteins are :
- round, compact , insoluble
- long, tightly coiled, soluble
- round, compact ,soluble
- long, tightly coiled, insoluble
8. which bond can be formed when O- AND NH3+ get close in polypeptide chains ?
- ionic bond
- disulfide bond
- hydrogen bond
- covalent bond
9. this level occurs in proteins of more than one polypeptide chain.
- secondary
- tertiary
- quaternary
- primary
10. ------ can link together with ------ bonds to form a polypeptide chain.
- amino acids - peptide
- amino acids - hydrogen
- glucose - hydrogen
- cellulose - peptide
11. collagen is a strong protein that forms connective tissue in animals. which type of 3D shape does it have ?
12. globular proteins are easily transported, because:
- they are rope shape.
- they are insoluble.
- they are soluble.
- they are long and tightly coiled.
13. haemoglobin is a ------ protein made of ----- polypeptide chain.
- globular-four
- fibrous-three
- globular-one
- fibrous-two
14. polypeptides are formed by :
- hydrolysis - a molecule of water is formed
- condensation reaction - a molecule of water is released
- condensation reaction - a molecule of water is formed
- hydrolysis - a molecule of water is released
15. a protein's ------ structure determines its 3D structure and properties.
- tertiary
- quaternary
- primary
- secondary