White, an inherently positive color, is associated with purity, virginity, innocence, light, goodness, heaven, safety, brilliance, illumination, understanding, cleanliness, faith, beginnings, sterility, spirituality, possibility, humility, sincerity, protection, softness, and perfection.his post is part of the Color Meaning Blog Series, detailing the meanings associated with colors such as red, orange, yellow, green, blue, purple, grey, black, white, brown, pink, turquoise, gold, silver, and beige.
The last class of organic molecules are the nucleic acids. There are two varieties: ribonucleic acid, or RNA, and deoxyribonucleic acid, or DNA. These polymers are long chains of components called bases, of which there are only five types. RNA is a single-strand molecule; DNA is a spiral of two cross-connected strands. DNA carries information. Part of the DNA in a cell is genes, which code for protein molecules. Each type of receptor, or enzyme, or neurotransmitter, has a stretch of DNA in which its sequence of amino acids is coded.
DNA molecules are carriers of an organism's genetic information. A cell's chromosomes are made from DNA molecules and associated proteins. This chapter looks at the discovery and structure of DNA-the molecule of life.ucleotides are made of one nitrogenous base, one phosphate molecule and one sugar molecule (deoxyribose in DNA and ribose in RNA) There are four different types of nucleotides found in DNA. When drawing the DNA molecule model these nucleotides are referred to by their 'initials': 1  A is for adenine.