Differences Between Bacteria And Viruses Essay - 771 Words.

In comparison, viruses are not even considered living organisms. They require a host cell to carry out life processes, such as replication and carrying out genetic instructions, etc. Bacteria are.

One difference between the two is that bacteria contain ribosomes and viruses do not. Another difference is that bacteria can reproduce in many different places while viruses need a living cell to.

Virus represents acellular reproduction and makes copies of itself through one of the two cell cycles, either the lysogenic cycle or the lytic cycle. The first step of the lytic cycle is adsorption, the virus attaches to a host cell.

Bacteria are intercellular organisms (i.e. they live in-between cells); whereas viruses are intracellular organisms (they infiltrate the host cell and live inside the cell). They change the host cell's genetic material from its normal function to producing the virus itself. There are some useful bacteria but all viruses are harmful.

Independent of a host cell, a virus is called a virion. When just the nucleic acid is present, it is called a viroid. Viruses can infect cells, including human cells, in two ways. Both start out similarly: a virus particle attaches to a cell and injects nucleic acid.

DNA viruses enter a host cell,usually when the membrane of the virus fuses with the cell’s membrane. The contents of the virus enter the cell, travel to the nucleus and take over the cell’s biochemical machinery for DNA replication and transcription into RNA. The RNA controls the formation of proteins needed by the virus to coat the viral DNA.

The simplest cells such as bacteria are known as Prokaryotic cells, and human cells are known as Eukaryotic cells. The main difference between each of these cells is that a eukaryotic cell has a nucleus and a membrane bound section in which the cell holds the main DNA which are building blocks of life.

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Prokaryotic cells. Prokaryotes do not have a nucleus like eukaryotes do. Their DNA is not membrane-bound, just free in the cytoplasm. The extra features of prokaryotic cells vs. eukaryotic cells you must learn are: -the cytoplasm overall does not contain membrane-bound organelles such as mitochondria and endoplasmic reticulum-prokaryotic ribosomes are smaller than their eukaryotic.

There are only two types of prokaryotic cell: the bacteria and the blue-green bacteria. Examples of the eukaryotic cell include animal cells, plant cells and fungi. Viruses are neither prokaryotic nor eukaryotic. During this essay I will explore the structure of both the prokaryote and the eukaryote, and consider which is the more primitive.

Destroys the host cell releasing new viruses. SIZE Larger Super tiny QUICK RECALL FACTS: (The biggest difference between viruses and bacteria is that viruses must have a living host - like a plant or animal - to multiply, while most bacteria can grow on non-living surfaces. (There are some useful bacteria but all viruses are harmful.