Question

Humulin is

• A. A form of chitin
• B. A human insulin
• C. A powerful antibiotic
• D. An enzyme

Answer 1

The correct option is B A human insulin

Humulin is a polypeptide hormone structurally identical to human insulin synthesized through rDNA technology in a special non-disease-producing laboratory strain of Escherichia coli bacteria. Humulin R (insulin human recombinant) U-100 has the empirical formula C${}_{257}$H${}_{383}$N${}_{65}$O${}_{77}$S${}_6$ and a molecular weight of 5808.

Humulin R (insulin human recombinant) U-100 is a sterile, clear, aqueous and colourless solution that contains human insulin (rDNA origin) 100 units/mL, glycerin 16 mg/mL and metacresol 2.5 mg/mL, endogenous zinc (approximately 0.015 mg/100 units) and water for injection. The pH is 7.0 to 7.8. Sodiumhydroxide and/or hydrochloric acid may be added during manufacture to adjust the pH. Thus, the correct answer is option B.