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.
What is Angina? Angina pectoris is caused by an insufficient supply of oxygen to the heart muscle. Angina usually precedes a heart attack. What are the Signs and Symptoms of Angina? The characteristic symptoms are a squeezing or pressure-like pain in the chest occurring immediately after exertion. Angina can also be triggered by emotional tension, cold weather or large meals. Pain may radiate to the left shoulder blade, left arm or jaw.