Biology Notebook 1st Period By: Camilo Andrés Garzón 8B

FOR MORE INFORMATION CLICK ON THE IMAGES ALONG THE NOTEBOOK

TOPICS VIRUS – Definition Characteristics of Virus V.S. Characteristics of Living Things Types of Replication Types of Viruses Infectious Agents Vaccines Mentefacto

VIRUS - Definition A Virus is an ultramicroscopic particle (from 20-300 nm in diameter) metabolically inert, that is an infectious agent that replicates only within the cell of a living host, composed of an RNA or DNA core, a protein coat (capsid) and sometimes a surrounding envelope.

Characteristics of Viruses V.S. Characteristics of Living Things They Grow They Reproduce They are made up of Cells They Need and Use Energy They Develop They are Organized They have a Life Span They Adapt They don’t grow They don’t reproduce They aren’t made up of cells They don’t need or use energy They don’t develop They aren’t organized They don’t have a life span They Adapt

Types of Replication Lytic Cycle Lisogenic Cycle Penetration Replication of G.M. Transcription Protein Synthesis Viral Assembly Releasing Penetration G.M. is mixed with G.M. of the cell Cellular Division DNA Activation Replication of G.M. Transcription

Types of Viruses Viruses with RNA (single or double stranded) Viruses of protein + genetic material Viruses with DNA (single or double stranded) Viruses with a surrounding envelope + protein + genetic material

Icosahedron viruses Enveloped viruses Helical viruses Complex viruses

Infectious Agents Viroids Prions Are made only of Protein (they are neurotransmitters that were folded in a wrong way) Only attacks Animals’ nervous system Are made only of Genetic Material (DNA or RNA, Single or Double Stranded) Only attacks Plants

Vaccines Vaccines are viruses that are modified viruses that affect other viruses. They are only made of the protein coat (capsid) of the virus. It “tells” the genetic sequence of the virus, to the cells of the organism that is infected. Antibiotics cannot destroy viruses, because viruses are metabolically inert, they aren’t alive. They were discovered by Edward Jenner in order to fight against smallpox.

Vaccinia (Smallpox) Vaccine

VIRUS Ultramicroscopic Particle Viroid Prions DNA RNA SINGLE DOUBLE According to structure VIRUS Viroid Prions According to G.M. According to strands DNA RNA SINGLE DOUBLE

Characteristics Metabolically inert Only replicates within the cell of a living host Composed of a RNA or DNA, single or double stranded, and a protein coat named capsid It only fulfills one characteristic of living things, and that is that they adapt It varies from size 20-300 nm

FOR MORE INFORMATION Bibliography: BIOLOGY NOTEBOOK *1ST PERIOD UNIVERSITY OF SOUTH CAROLINA – MEDICINE http://pathmicro.med.sc.edu/book/video-mp.htm Bibliography: BIOLOGY NOTEBOOK *1ST PERIOD