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 ...
Co-ordinate (dative covalent) bonding. A covalent bond is formed by two atoms sharing a pair of electrons. The atoms are held together because the electron pair is attracted by both of the nuclei. In the formation of a simple covalent bond, each atom supplies one electron to the bond - but that doesn't have to be the case. A co-ordinate bond (also called a dative covalent bond) is a covalent bond (a shared pair of electrons) in which both electrons come from the same atom.