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.
As heart disease progresses, you may have tightness, pressure or discomfort in your chest during physical activity or when stressed. But it goes away shortly after you stop the activity or get rid of the stress. Angina symptoms in women can also include feeling out of breath, nausea, vomiting, abdominal pain or sharp chest pain. Once the extra demand for blood and oxygen stops, so do the symptoms.