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.
Symptoms of angina. The most common symptom of angina is a feeling of pain or discomfort in your chest. The pain can feel tight, dull or heavy. The pain can spread from your chest to your left arm, neck, jaw and back. In some cases, the pain is similar to indigestion. Chest pain may also occur with: 1  breathlessness.2  feeling sick (nausea).he most common symptom of angina is a feeling of pain or discomfort in your chest. The pain can feel tight, dull or heavy. The pain can spread from your chest to your left arm, neck, jaw and back. In some cases, the pain is similar to indigestion. Chest pain may also occur with: 1  breathlessness. 2  feeling sick (nausea).