what are the major parts of a virus?
160936
The simplest virions consist of two basic components: nucleic acid (single- or double-stranded RNA or DNA) and a protein coat, the capsid, which functions as a shell to protect the viral genome from nucleases and which during infection attaches the virion to specific receptors exposed on the prospective host cell.
1204497
Many viruses follow several stages to infect host cells. These stages include attachment, penetration, uncoating, biosynthesis, maturation, and release.
693793
While there some advanced viruses that seem fancy, viruses don't have any of the parts you would normally think of when you think of a cell. They have no nuclei, mitochondria, or ribosomes. Some viruses do not even have cytoplasm. We've already established what viruses aren't.
1218864
['Nucleic acid -contains 3-400 genes. ... ', 'Capsid -The capsid accounts for most of the virion mass. ... ', 'Envelope -this is an amorphous structure composed of lipid, protein and carbohydrate which lies to the outside of the capsid. ... ', 'Spikes. ... ', 'Icosahedral -The protomeres aggregate in groups of five or six to form the capsomere.']
1156563
Non-enveloped viruses are composed of capsid protein and nucleic acid (DNA or RNA), viz. nucleocapsid., which constitute an infectious unit, the virion, whereas enveloped viruses are composed of an envelope and nucleocapsid.
490550
In general, the shapes of viruses are classified into four groups: filamentous, isometric (or icosahedral), enveloped, and head and tail.
222229
['Cell Membrane (Plasma Membrane)', 'Cytoplasm.', 'Nucleus.']
354258
They are acellular, that is, they contain no cytoplasm or cellular organelles. They carry out no metabolism on their own and must replicate using the host cell's metabolic machinery. In other words, viruses don't grow and divide. Instead, new viral components are synthesized and assembled within the infected host cell.
1073613
Structure. Because most viruses are extremely well adapted to their host organism, virus structure varies greatly. However, there are some general structural characteristics that all viruses share. All viruses have a capsid or head region that contains its genetic material.
1289376
['Cell.', 'Life.', 'Blood.', 'Connective tissue.', 'Fluid.', 'Lymph.', 'Epithelium.', 'Membrane.']
503975
Most viruses have either RNA or DNA as their genetic material. The nucleic acid may be single- or double-stranded. The entire infectious virus particle, called a virion, consists of the nucleic acid and an outer shell of protein. The simplest viruses contain only enough RNA or DNA to encode four proteins.
919378
Classification of Viruses. Morphology: Viruses are grouped on the basis of size and shape, chemical composition and structure of the genome, and mode of replication. Helical morphology is seen in nucleocapsids of many filamentous and pleomorphic viruses.
407080
['cell membrane.', 'cytoplasm.', 'nucleus.', 'mitochondria.']
1009790
Characteristics of bacteriophages Like all viruses, phages are simple organisms that consist of a core of genetic material (nucleic acid) surrounded by a protein capsid. The nucleic acid may be either DNA or RNA and may be double-stranded or single-stranded.
204053
['5 parts of a computer. ... ', 'The motherboard. ... ', 'The Central Processing Unit (CPU) ... ', 'The Graphics Processing Unit (GPU) ... ', 'Random Access Memory (RAM) ... ', 'Storage.']
809489
Proteins and lipids are the major components of the cell membrane.
64838
Viruses do, however, show some characteristics of living things. They are made of proteins and glycoproteins like cells are. They contain genetic information needed to produce more viruses in the form of DNA or RNA. They evolve to adapt to their hosts.