Skip to main content

Coronavirus (COVID19)

                                       Coronavirus  (COVID-19)   
                                              
Coronavirus disease (COVID-19) is an infectious disease caused by a newly discovered coronavirus.
Most people infected with the COVID-19 virus will experience mild to moderate respiratory illness and recover without requiring special treatment.  Older people, and those with underlying medical problems like cardiovascular disease, diabetes, chronic respiratory disease, and cancer are more likely to develop serious illness.
The best way to prevent and slow down transmission is be well informed about the COVID-19 virus, the disease it causes and how it spreads. Protect yourself and others from infection by washing your hands or using an alcohol based rub frequently and not touching your face. 
The COVID-19 virus spreads primarily through droplets of saliva or discharge from the nose when an infected person coughs or sneezes, so it’s important that you also practice respiratory etiquette (for example, by coughing into a flexed elbow).
Coronaviruses constitute the subfamily Orthocoronavirinae, in the family Coronaviridae,   order nidovirles, and realm ribovirea. They are enveloped virus with a positive-sence single standred RNA genome and a nucleocapsidof helical symmetry. The genome size of coronaviruses ranges from approximately 27 to 34 kilobases, the largest among known RNA vieuses The name coronavirus is derived from the Latin corona, meaning "crown" or "halo", which refers to the characteristic appearance reminiscent of a crown or a solar corona around the virions (virus particles) when viewed under two-dimensional transmission electron microscopy, due to the surface being covered in club-shaped protein spikes.
The genome organization for a coronavirus is 5'-leader UTR-replicase/transcriptase-spike (S)-envelope (E)-membrane (M)-nucleocapsid (N)-3'UTR-poly (A) tail. The open reading frames 1a and 1b, which occupy the first two-thirds of the genome, encode the replicase/transcriptase polyprotein. The replicase/transcriptase polyprotein self cleaves to form the nonstructural proteins (nsps).
The later reading frames encode the four major structural proteins: spike, envelope, membrane, and nucleocapsid. Interspersed between these reading frames are the reading frames for the accessory proteins. The number of accessory proteins and their function is unique depending on the specific coronavirus.


Comments

Post a Comment

Popular posts from this blog

Periodic table

                                   Periodic table ELEMENTS- Elements are pure from of matter that are made up of one type of atom. ·        DOBEREINER- Grouped all elements in three (triads). ·        NEWLAND- Observed that when elements are arranging in increasing order of their atomic mass. Every eighteen element beginning from any element resemble the first element in its physical and chemical properties. ·        DMITRI MENDLEVE- He is a Russian chemist gave the first periodic table of elements based on his law which states that “The properties of elements are the periodic functions of their atomic mass.”   ·        Modern periodic table was given by HENERY MOSELEY. Periodic table- A tabular form of elements in group and periods highlighting the regular trends in...
2 comments
Read more

ALBERT EINSTEIN

                    ALBERT EINSTEIN Albert Einstein was born on 14 March 1879 in the German city of Ulm, without any indication that he was destined for greatness. On the contrary, his mother thought Albert was a freak. To her, his head seemed much too large. At the age of two-a-half, Einstein still wasn't talking. When he finally did learn to speak, he uttered everything twice. Einstein did not know what to do with other children, and his playmates called him "Brother Boring." So the youngster played by himself much of the time. He especially loved mechanical toys. Looking at his newborn sister, Maja, he is said to have said: "Fine but where are her wheels?" A headmaster once told his father that what Einstein chose as a profession wouldn't matter, because"he'll never make a success at anything." Einstein began learning to play the violin at the age of six, because his mother wanted him to;  he later became a violinist, m...
2 comments
Read more

CA chapter 2 notes class 10

COMPUTER APPLICATION.. CLASS-10... CHPATER -2 INTERNET     SERVICES                                             1)Fill in the blanks.   a.        Google is a good example of a Search Engine .   b.       Search engines broadly consist of three components: The Crawler , The Index , The Search Algorithm .   c.        An E-mail program enables you to send, receive and manage your message through the World Wide Web.   d.        Download means to transfer files from the system you have called to the computer you are using. e.        Upload means to transfer files from your hard disk to the Computer System you have accessed by a modem.   f.   News Group   provide a good way to exchang...
1 comment
Read more