mari belajar sains

sains sangat penting dalam kehidupan seharian kita , sesebuah negara maju disebabkan ramai masyarakat yang  mempelajari ilmu sains. Negara tidak akan maju tanpa sains. Jika dilihat pada zaman dahulu , ekonomi sesebuah negara mula berkembang dengan terciptanya teknologi - teknologi canggih untuk kegunaan harian mereka. Ilmu sains berkembang melalui orang islam seperti ibnu sina, ibnu khaldun, ibnu bathuta, al-kawarizmi dan ramai lagi. Didalam al-quran  membuktikan banyak kandungan ilmu sains, yang mana pada hari ini orang barat sibuk mengkajinya untuk untuk perkembangan teknologi. selain itu, mempelajari ilmu sains ini menjadikan seseorang itu lebih beriman kepada Allah SWT. Di blog ini penulis ingin berkongsi banyak ilmu sains yg masih belum kita pelajari, atau sudah pelajari, dan membuktikan kekuasaan Allah. sedikit sebanyak menambahkan ilmu pengetahuan kita . Moga Allah memberkhati. aminnn..

STRUCTURE OF VIRUS

Structure of Virus

 

All viruses contain nucleic acid, either DNA or RNA ( but not both ), and a protein coat known as CAPSID

Capsid - is the protein shell that encloses that nucleic acid : with it enclosed the nuclei acid, it is called the nucleocapsid.

This shell is composed of protein organized in subunits known as copsomers. Viral capsids normally have a helical or polyhedral structure or combination of both.

The Capsids has three function.

a. it protects the nucleic acid from digestion by enzyme

b. contains special site on its surface that allow the virus to attach to a host cell,

c. provide protein that enable the virus to penetrate the host cell membrane and, in some cases, to inject the infectious nucleic acid into cells cytoplasm.

Introduction To Virus

VIRUS are not plants, animals, or bacteria, but they are typical parasites of the living kingdoms. virus are not living organisms.

How Virus Reproduce ?

- without a host cell, viruses cannot carry out their life-sustaining function. They cannot synthesize protein, because they lack ribosomes and must use the ribosomes of their host cell to translate viral messenger RNA (ribonucliec acid).

- Virus cannot generate or store energy in the form of adenosine triphosphate (ATP), but have to derive their energy and all metabolic functions, from the host cell. 

- viruses are generally classified by organisms they infect, animal, plant, or bacteria. Viruses cannot penetrate plant cell walls, virtually all plant viruses are transmitted by insect or other organisms that feed on plant, based on figure 2.

figure 2 : one of the type of nematode that penetrate the leave cell wall to get the food.

In its infective form, outside the cell wall, a virus particle is called a virion. virion is a tiny, infectious particle containing a nucleic acid core with a protein coat known as a capsid. Each virion contains at least one unique protein synthesized by specific genes in its nucleic acid. Viroids ( meaning virus like ) are diseases causing organisms that contain only nucleic acid and have no structural proteins.

other viruslike particles called prions are composed primarily of a protein tightly integrated with small nucleic acid molecule.

science is fun