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.
Back to Top Symptoms. Symptoms of angina may include: 1  Chest pain that you may also feel in the shoulder, arm, jaw, neck, back, or other area.2  Discomfort that feels like tightness, squeezing, crushing, burning, choking, or aching. 3  Discomfort that occurs at rest and does not easily go away when you take medicine. 4  Shortness of breath.5  Sweating.ith stable angina, the chest pain or other symptom only occurs with a certain amount of activity or stress. The pain does not occur more often or get worse over time. Unstable angina is chest pain that is sudden and often gets worse over time.