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 ...
The covalent bond that joins the nucleotides is called a phosphodiester bond (def). Each DNA strand has what is called a 5' end and a 3' end. This means that one end of each DNA strand, called the 5' end (def) , will always have a phosphate group attached to the 5' carbon of its terminal deoxyribonucleotide (see Fig.