The condensation reaction that forms nucleic acid polymers occurs between a group on one nucleotide and a group on a second nucleotide. a. phosphate, hydroxyl b. carbon, carbonc. nitrogenous base, sugar d. nitrogenous base, nitrogenous base

a. Posphate and hydroxyl

Explanation:

Hydroxyl group on carbon No.5 of ribose or deoxyribose on one nucleotide will react with hydroxyl group on phosphate on another nucleotide. Phosphodiester bond is formed by condensation reaction which is called as esterification.

Enzymes involved are DNA polymerase and DNA ligase in DNA replication

and RNA polymerase and ligase in RNA transcription

DNA has deoxyribose

RNA has ribose

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.