Bacteria-virus-types of procaryotes, Biology

Bacteria:

Bacteria have a protective covering called 'cell wall'. Beneath this. there is a plasma membrane which encloses protoplasm of the bacterium containing various types of RNA, DNA, proteins and organic molecules. In bacteria, DNA molecule and enzymes involved in oxidation of food are found associated with th-e plasma membrane (Figure shown below).

1903_bacteria.jpg

Bacteria, though simple in their structure, are the most abundant of all the life forms on earth today. This is due to their rapid rate of multiplication and the ability to adapt to any nutrient and environment.

Viruses:

Viruses are on the borderline of life between non-living and the living organisms. They have some characteristics of a living organism such as the ability to reproduce while some of non-living objects, like the absence of metabolic processes and ability to crystallise. Viruses are very simple organisms with a circular nucleic acid molecule (DNA or RNA) surrounded by a protein coat (Figure shown below).

 

2081_virus.jpg

Posted Date: 12/8/2012 8:09:18 AM | Location : United States







Related Discussions:- Bacteria-virus-types of procaryotes, Assignment Help, Ask Question on Bacteria-virus-types of procaryotes, Get Answer, Expert's Help, Bacteria-virus-types of procaryotes Discussions

Write discussion on Bacteria-virus-types of procaryotes
Your posts are moderated
Related Questions
Determine Effect of Inadequate calcium intake and iron deficiency anaemia? The requirement of iron and calcium is at its peak in adolescence due to an increase in the skeletal

Q. How does the vegetal stratification of an ecosystem influence the biological diversity? The vegetal stratification of the ecosystem like the strata of the Amazon Rainforest,

Define Preterm and Low Birth Weight? The foetal and neonatal health is mainly dependent on the birth weight and it has been well recognized that perinatal (from birth upto one

a) What is biological magnification? b) Describe how DDT as a water pollutant undergoes biological magnification?

Explain Xeno-transplantation Xeno-transplantation could enable individuals to survive and contribute their alleles to the gene pool who might not have already done so thus inc

Explain the Sampling and Analysis of Microbial Load? A food or equipment can be free of visible dirt and still be carrying microorganisms or chemicals that can cause food borne

Erysipeloid A zoonosis called erysipelas in animals, rose disease in pig, erysipaloid in man is caused by Erysipelothrix rhusiopathiae (insidiosa). Other names given to this co

Convert 3.5°F to Celsius Four hundred pounds is how many kilograms?

Q. If a person eats raw or badly cooked meat infected by Taenia solium or Taenia saginata will this person develop taeniasis or cysticercosis? If a person eats badly cooked or

What is signified by saying that in relation to a given trait conditioned by a gene with two different alleles the gametes are always "pure"? To say so that the gametes are pur