Q.Describe classes of proteins with their importance.

Step 1. Simple proteins yield only amino acids on hydrolysis, e.g. histones (important structurally, combining with nucleic acid to form nucleoproteins) and albumins (e.g. egg albumin, serum albumin, legumelin — important as widely distributed, heat-coagulable nutrient/transport proteins).

Step 2. Conjugated proteins combine a simple protein with a non-protein prosthetic group, and this prosthetic group is usually what gives the protein its special function — e.g. haemoglobin (globin + iron-containing haem) is vital for oxygen transport in respiration; mucoproteins (protein + carbohydrate, e.g. salivary mucin) have lubricating/protective roles; lipoproteins (protein + lipid, e.g. in the plasma membrane) have transport/structural roles. …

Describe the three protein classes with their examples and state the biologica …

• Treating 'conjugated protein' and 'derived protein' as the same thing — conjugated proteins are intact native proteins with a bound prosthetic group, while derived proteins are hydrolysis breakdown products. …