A: Nucleic acids are made up of monomers called nucleotides. Each nucleotide consists of a five-carbon sugar, a phosphate group and a nitrogenous base. Repeating nucleotides create nucleic acids such as DNA, or deoxyribonucleic acid, and RNA, or ribonucleic acid.
Pain and discomfort are the main symptoms of angina. Angina often is described as pressure, squeezing, burning, or tightness in the chest. The pain or discomfort usually starts behind the breastbone.Pain from angina also can occur in the arms, shoulders, neck, jaw, throat, or back.ngina often is described as pressure, squeezing, burning, or tightness in the chest. The pain or discomfort usually starts behind the breastbone. Pain from angina also can occur in the arms, shoulders, neck, jaw, throat, or back.
The typical symptoms of angina are described as: 1  Chest âtightness,â âsqueezing,â or âheaviness.â People describe this feeling as a weight or as a band being tightened around their chest. 2  Shortness of breath. 3  Sweating, nausea, and an anxious feeling.  Radiation of the chest pain into the left arm, neck, and jaw.