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Which of the following is FALSE regarding the structure of DNA?
A) Nitrogenous bases are found on the interior of a DNA molecule.
B) Nucleotides within a single strand of DNA are joined together by peptide bonds.
C) The two strands of a DNA molecule are bound together via hydrogen bonds.
D) In a molecule of DNA, the 3' end of one DNA strand is directly across from the ' end of the other DNA strand.
E) A molecule of DNA has both major grooves and minor grooves.

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Answer:

The correct answer will be option- B.

Explanation:

DNA is a nucleic acid made up of nucleotides which joins to each other to form two strands of DNA. Each strand is made up of nucleotide composed of a 5C deoxy-ribose sugar, a phosphate group and nitrogenous base. The sugar and phosphate group joins together to make the backbone of the DNA molecule and the nitrogenous bases aligned perpendicular to this backbone.

The nitrogenous bases are joined to the bases of the complementary base pairs via hydrogen bond and two nucleotides are joined to each other by forming phosphodiester bonds between 5' phosphate group of one nucleotide to 3'-OH group of another nucleotide.

Thus, Option-B is the correct answer.

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