How are dna and rna molecules alike?

- DNA and RNA both contain pentose sugars.

- DNA and RNA both have 3 nitrogenous bases: Adenine, Cytosine and Guanine.

- DNA and RNA both have a phosphate groups in their nucleotides.  Sometimes called phosphoric acid.

- They both have the base pair of Guanine and Cytosine.

- They are both necessary for the cell to produce proteins.

- DNA makes mRNA which then is translated into protein

the alkaline earth metals (beryllium (be), magnesium (mg), calcium (ca), strontium (sr), barium (ba), and radium (ra)) are a group of chemical elements in the s-block of the periodic table with very similar properties: shiny. silvery-white. hopefully this ? i didn't fully understand the question