Deficiencies in this vitamin can lead to adrenal stress and high cortisol levels or cortisol depletion as your body attempts to make up for the vitamin deficiency by using this hormone's overdrive mechanism, which is usually reserved for emergencies, illness and other stressful events.
The reason why it is advantageous to have weak hydrogen bonds between complementary base pairs and strong covalent bonds between phoshate and deoxyribose groups in a DNA molecâ¦ule is because the strong covalent bonds running along the  ladder  of the DNA molecule ( the phospate and deoxyribose units ) keep the molecule together during its ...
In DNA, however, it loses two of these phosphate groups, so that only one phosphate is incorporated into a strand of DNA. When nucleotides are incorporated into DNA, adjacent nucleotides are linked by a phosphodiester bond: a covalent bond is formed between the 5â phosphate group of one nucleotide and the 3â-OH group of another (see below). In this manner, each strand of DNA has a âbackboneâ of phosphate-sugar-phosphate-sugar-phosphate. The backbone has a 5â end (with a free phosphate) and a 3â end (with a free OH group). In the structure below, each nucleotide is drawn in a different color, for clarity.