Navigation Links
Lytic cycle


The lytic cycle is one of the two cycles of viral reproduction, the other being the lysogenic cycle. These cycles should not, however, be seen as discrete and separate, but rather as somewhat interchangeable. The lytic cycle is typically thought of as the main method of viral replication, since it results in the destruction of the infected cell, which is how viruses cause damage to their hosts.

Contents

Description

The lytic cycle is a three-stage process.

Infection

When a virus infects a cell, it first binds with the cell membrane using receptor molecules on the virus's surface. The virus then injects its genetic material, which can be either DNA or RNA, into the cell.

Growth

The viral nucleic acid takes over and uses the host cells organelles to make many copies of the virus. In the case of DNA viruses, the DNA transcribes itself into messenger RNA (mRNA) molecules that are then used to direct the ribosome. In retroviruses, or RNA viruses, a unique enzyme called reverse transcriptase transcribes the viral RNA into DNA, which is then transcribed again into mRNA.

Replication and lysis

After many virus copies are made, they are assembled into complete viruses. The cell eventually becomes filled with viruses (typically 100-200) until it bursts, or lyses; this end process gives the cycle its name. The new viruses are free to infect other cells.


'"/>


(Date:7/11/2014)... Using spider toxins to study the proteins that let ... say they have stumbled upon a biological tactic that ... insect plagues in a safe and environmentally responsible way. ... be lethal for one species and harmless for a ... target specific pests without harming beneficial species like bees. ...
(Date:7/10/2014)... In Santa Fe, Albuquerque, and other major cities in ... watered with treated municipal wastewater rather than precious potable ... more than 40% of all golf courses receive treated ... courses. , Additionally, golf courses and homeowners alike ... nutrient in fertilizer is nitrate. A New Mexico State ...
(Date:7/10/2014)... NEW YORK , June 27, 2014 /PRNewswire/ ... against Provectus Biopharmaceuticals, Inc. ("Provectus" or the "Company")(NYSE-MKT: ... action, filed in United States District Court, Middle ... Division, is on behalf of a class consisting ... otherwise acquired Provectus securities between December 17, 2013 ...
Breaking Biology News(10 mins):Potent spider toxin 'electrocutes' German, not American, cockroaches 2Potent spider toxin 'electrocutes' German, not American, cockroaches 3'Tailored' water -- the latest in lawn care 2SHAREHOLDER ALERT: Pomerantz Law Firm Announces the Filing of a Class Action against Provectus Biopharmaceuticals, Inc. and Certain Officers - PVCT 2SHAREHOLDER ALERT: Pomerantz Law Firm Announces the Filing of a Class Action against Provectus Biopharmaceuticals, Inc. and Certain Officers - PVCT 3
... by a discovery about how chickens regulate their appetites. ... the signals sent from its stomach to its brain that ... Poultry farmers often have to restrict food for chickens ... can overeat, affecting their ability to reproduce. The ...
... has shown that obesity runs in families, and twin studies ... heritability estimates over 50%. 32 genes have been identified as ... genes alone cannot fully explain the high level of heritability ... individual differences in childhood body weight. This has led to ...
... to convention, vegetation, when well-maintained, can lower the rates ... robbery and burglary, in cities, according to a Temple ... Evidence from Philadelphia, PA," published in the journal, ... longstanding principle, particularly in urban planning, that you don,t ...
Cached Biology News:Appetite genes are key to better diets for poultry, study shows 2Study finds strong genetic component to childhood obesity 2Urban vegetation deters crime in Philadelphia 2
Other biology definitionOther Tags