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 pectoris is the medical term for pain or other discomfort in the chest that is due to coronary heart disease. The chest pain or discomfort associated with angina occurs when an area of the heart muscle does not receive enough oxygen-rich blood.ngina pectoris is the medical term for pain or other discomfort in the chest that is due to coronary heart disease. The chest pain or discomfort associated with angina occurs when an area of the heart muscle does not receive enough oxygen-rich blood.