Match List I with List II and select the correct answer by using codes given below the lists: List I - List II 1. I. Vitamin - A) Pepsin 2. II. Enzyme - B) Carotene 3. III. Hormone - C) Keratin 4. IV. Protein - D) Progesterone Codes:

1. Match the biological molecules/substances (List I) with their examples or types (List II). 2. I. Vitamin: Carotene (Beta-carotene) is a precursor to Vitamin A. So, I matches B. 3. II. Enzyme: Pepsin is a digestive enzyme found in the stomach. So, II matches A. 4. III. Hormone: Progesterone is a steroid hormone involved in the menstrual cycle, pregnancy, and embryogenesis. So, III matches D. 5. IV. Protein: Keratin is a fibrous structural protein found in hair, nails, feathers, horns, etc. So, IV matches C. 6. The correct matching is I-B, II-A, III-D, IV-C.