Question

Two consecutive nucleotides of a nucleic acid are linked with ______________ bond.

• A. glycosidic
• B. phospho-di-ester
• C. peptide
• D. hydrogen

Hint:

Phospho-di-ester bonds form the sugar-phosphate backbone of DNA and RNA.

Answer 1

The Correct Option is B

Step 1: Structure of nucleic acids.
Nucleic acids are polymers made up of repeating nucleotide units linked together to form a long chain.
Step 2: Bond between nucleotides.
Each nucleotide is connected to the next through a phospho-di-ester bond between the phosphate group of one nucleotide and the sugar of the next.
Step 3: Elimination of incorrect options.
Glycosidic bonds join base to sugar.
Peptide bonds are found in proteins.
Hydrogen bonds occur between complementary bases, not between nucleotides.
Step 4: Conclusion.
Two consecutive nucleotides are linked by a phospho-di-ester bond.