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.
Angina occurs when there is not enough blood flow to the heart. Angina can be dangerous. So it is important to pay attention to your symptoms, know what is typical for you, learn how to control it, and know when to call for help. Symptoms of angina include chest pain or pressure, or a strange feeling in the chest.ngina occurs when there is not enough blood flow to the heart. Angina can be dangerous. So it is important to pay attention to your symptoms, know what is typical for you, learn how to control it, and know when to call for help. Symptoms of angina include chest pain or pressure, or a strange feeling in the chest.