Transcription of two genes. (a) RNA polymerase moves from the 3â² end of the template strand, creating an RNA strand that grows in a 5â² â 3â² direction (because it must be antiparallel to the template strand).
The atoms in sugar do not form ions; instead, they share their electrons. The type of bond that forms from the sharing of electrons between the atoms of the table sugar is a covalent bond. Table sugar has a much more complex chemical structure than salt.
Within a strand - via phosphates which link carbon 3 of deoxyribose on one nucleotide with carbon 5 on the deoxyribose of the next nucleotide producing a sugar- phosphate backbone to the chain. Across strands - via base pairing - H bonds between A & T; G & C. Bonds Between Nucleotides. The nucleotide backbone is held together with covalent bonds called phosphodiester bonds. The bond is comprised of C-O-P-O-C. The bond across the strand is comprised of hydrogen bonds. For A-T links, there are 2 H bonds and for G-C links, there are 3 H bonds.