Which protein is found in the maximum amount:
1.  Catalase
2.  Zinc carbonic anhydrase
3.  Transferase
4.  RUBISCO

The secondary structure of protein, which is attached to lipid layer and lining the pores of cell membrane will be:
1.  α-Helix
2.  β-Strand
3.  β-Chain
4.  Random

Collagen is a:

1. Fibrous protein

2. Globular protein

3. Lipid

4. Carbohydrate

Enzymes, vitamins, and hormones can be classified into a single category of biological chemicals because all of these: