University:
University of Nebraska-Lincoln
Course:
BIOS 101 | General Biology
Academic year:

2019
Views:

366

Pages:

4
Author:

esfredint7qo

Chapter 21 Viruses While all living things are made of one or more cells, viruses ARE NOT cells Viruses are classified as a LIVING THING - Bacteria (not virus) Medications like antibiotics attack bacteria which are living things too - Fungi (not virus) Anti-fungal Medication can be used on fungi which are living things too Structure -Viruses are much smaller than cells. Electron microscope in order to see a virus - Viruses come in different shapes. EX: Bacteriophage (attack bacteria) GENETICS - All viruses have some type of genetic material. Either in the form of DNA or RNA - Viruses have some kind of protein code also known as capsid -Capsid can protect DNA or RNA genetic material ADDITIONS useful to virus in replication - Some viruses package special enzymes with them - Others have an outer envelope Virus Replication - Reproduction with a host - Viruses tend to be very specific for the host they infect, but anything alive can be a host - Cells have the machinery necessary in order to replicate Viral Replication Cycles Lysogenic Cycle Lytic Cycle • • • • • 1.- Virus, very selective, attaches to a host cell by binding to a receptor that the cell gives it access to dock there +The virus injects either its DNA or RNA, depending on what kind of genetic material it has, into the cell +Some viruses are taken inside the cell themselves 2.- Cells DO NOT notice the virus, bur. takes the genetic material. and starts following instructions 3.- Cells use its own resources to replicate the virus until it explode the cell membrane and get out of the cell to infect others • • • • • • 1.- SAMEE +The genetic material stays hidden in the host’s genetic material +Some viruses are taken inside the cell themselves 2.- When the host makes new cells, it replicates its own genetic material mutated with the viral genetic material 3.- All the replicated/ mutated cell with the viral DNA can start assembling viruses. FROM RNA TO DNA REVERSE TRANSCRIPTION HIV DO WE NEED TO UNDERSTAND IT? IF SO, CAN YOU EXPLAIN IT BENEFITS GENE THERAPY - A virus that targets pest insects could be an alternative to a chemical pesticide Nuclear Polyhedrosis Virus - When we talk about any chemical pesticide, or viral there could be consequences in the ecosystem CORONAVIRUS -December 2019 in China - In the following months, it spread to other countries doubling the Cases Within days Virus: Severe Acute Respiratory Syndrome-Related 2 Disease: Covid-19 - Virus is a hull around genetic material and a few proteins Corona might spread by the surfaces, but it is uncertain how long it can survive on them - Main way of spreading seems to be droplet infection When people cough, or if someone touch an ill person and then it faces Vaccines. Teach our immune system how to respond to a threat 4 TYPES OF VACCINES Weaken/ liveetenueted Dead inactive Recombinan protein mrna SUBUNI=RECOMBINAN PROTEIN

Chapter 21 Viruses - Lecture Notes

Related Documents

Description

Related Documents

Almost There!

Free up your schedule!

Take 5 seconds to unlock