The insulin molecule is composed of two polypeptide chains, one consisting of 20 amino acids and the other consisting of 31.What is the minimum number of base pairs of DNA required to code for this molecule?
Correct answer: D. 153
- A. 20
- B. 51
- C. 102
- D. 153
Explanation
Each amino acid is coded by a codon of 3 nucleotides bases. Hence, the least number of base pairs 20 x 3 + 31 × 3 = 153.
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The chapter covers water's polarity and biological roles, carbohydrates, lipids, proteins and nucleic acids, including their monomers, bonds, structures and functions. It also distinguishes RNA from DNA and explains conjugated molecules such as glycoproteins, glycolipids and nucleoproteins, which combine organic molecules with a non-protein component.
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