What is biliary atresia? Biliary atresia is a relatively rare disease that begins in early infancy and affects about one in every 10,000 to 20,000 infants. In biliary atresia the bile duct that leads from the liver to the intestine becomes damaged preventing bile from leaving the liver. In the early stages the bile duct outside the liver is mainly affected, but in later stages bile ducts inside the liver are also damaged.
Section 6.3 Viruses: Structure, Function, and Uses. A virus is a small parasite that cannot reproduce by itself. Once it infects a susceptible cell, however, a virus can direct the cell machinery to produce more viruses. Most viruses have either RNA or DNA as their genetic material.The nucleic acid may be single-or double-stranded.he T phages of E. coli are large lytic phages that contain a single molecule of double-stranded DNA. This molecule is about 2âÃâ10 5 base pairs long in T2, T4, and T6 viruses and about 4âÃâ10 4 base pairs long in T1, T3, T5, and T7 viruses.
Evidence that DNA is the Genetic Material. DNA and the Genetic Code ... Genetic material. Two different kinds of genetic material exist: deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).Most organ isms use DNA for their long-term information storage, but some virus es (e.g., retrovirus es) have RNA as their genetic material. gene, a part of a gene, a group of genes, or fragments of many genes, on a molecule of dna, a fragment of dna, a group of dna molecule s, or fragments of many dna molecule s. Could refer to anything from a small fragment of dna to the entire genome of an organ ism.