Question

Nucleotides in RNA are connected to one another in the polynucleotide chain by A. covalent bonds between bases. B. covalent bonds between sugars. C. covalent bonds between sugar and phosphate. D. hydrogen bonds between purines. E. hydrogen bonds between any bases.

Answer 1

Nucleotides in RNA are connected by covalent bonds between sugar and phosphate.

Step-by-step explanation:

Nucleotides in RNA are connected to one another in the polynucleotide chain by covalent bonds between sugar and phosphate. The sugar molecule of one nucleotide binds to the phosphate group of the next nucleotide, forming a phosphodiester bond. These bonds create a strong backbone for the RNA molecule.

Answer 2

C

Step-by-step explanation:

A ribonucleotide is very similar to a deoxyribonucleotide with the major difference being that they have a H instead of an OH in the 1’ carbon. Each ribonucleotide also has a phosphate molecule in their 5’ carbon like DNA. It is this phosphate that bonds with the 1’ carbon of the next monomer to form a phosphodiester bond through a condensation process – that releases a water molecule.