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.
In general, there are two types of bonds. Sigma-bonds and pi-bonds. The electrons in a sigma bonds are concentrated along the line directly connecting two atoms. The electrons in a pi bond follow arc shaped geometry (above and below) the two bonded atoms. Because of this shape, pi bonds are sometimes called banana bonds.