Question

If one end of the DNA strand is sugar molecule the other end will have

a. RNA b. anti-sugar molecule

c. nitrogenous base d. phosphoric acid​

Answer 1

Answer:

a. RNA b. anti-sugar molecule

Answer 2

If one end of the DNA strand has a sugar molecule then the other end will have d) Phosphoric acid.

DNA structure

• The DNA is composed of three separate molecules namely:

        1) Phosphoric acid     2) Nitrogenous bases     3) Ribose sugar

• The DNA strand is formed by phosphodiester linkage of the sugar and phosphate group. This forms the sugar-phosphate backbone of DNA.
• The 3' carbon of ribose sugar bonds with the 5' carbon of the second nucleotide.

• Therefore, ribose sugar is present at the 3' end of the DNA while phosphoric acid will be present at the 5' end of the same DNA molecule.

Incorrect options

• a)RNA refers to a single strand of DNA and does not form a constituent of DNA molecule
• b) Anti sugar molecule does not exist.
• c)Nitrogenous bases protrude from the DNA backbone and do not exist at the ends.