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. Also known as angina pectoris, angina occurs when an area of heart muscle does not get enough oxygen. The patient experiences chest discomfort, tightness or pain. Angina is not technically a disease, but rather a symptom of coronary artery disease.