This is most often used in biology to refer to the topology of nucleic acid strands. The direction of DNA strands is determined by their 5' phosphate to 3' hydroyl linkages. The strands are said to be antiparrallel because the 5' to 3' linkages point in opposite directions. This definition is simplistic-not all energy generating processes in bacteria involve the break down of larger molecules. A complementation analysis asks if two putative alleles, when in the same cell and acting independently, can supply all functions necessary for a wild-type phenotype.
Complementation is therefore a test of function.
A mutant that it is known to display its mutant phenotype only under certain conditions. One dalton weight 1.066 x 10 -24 grams. It is a convenient way of representing the weight of atoms and molecules. The genetic, biochemical, and structural features of a pathogen that enable it to inflict damage on a host. The relationships between host and parasite are dynamic, since each modifies the activities and functions of the other.