Differences Between Plasmid and Chromosomal Dna in Bacteria

Only available on StudyMode
  • Download(s) : 492
  • Published : April 12, 2013
Open Document
Text Preview
DIFFERENCES BETWEEN PLASMID AND CHROMOSOMAL DNA IN BACTERIA.

Eukaryotes have two or more chromosomes, prokaryotes such as bacteria possess a single chromosome composed of double-stranded DNA in a loop. DNA is located in the nucleoid of the cell and is not associated with protein A plasmid is an extra-chromosomal DNA molecule separate from the chromosomal DNA which is capable of replicating independently of the chromosomal DNA. Plasmids usually occur naturally in bacteria. A chromosome is an organized structure of DNA and protein that is found in cells. A chromosome is a single piece of coiled DNA containing many genes, regulatory elements and other nucleotide sequences. Chromosomes also contain DNA-bound proteins, which serve to package the DNA and control its functions. 1. Plasmids are circular and double stranded.

2. Plasmids have much less base pairs than chromosomes 3. Plasmids are rarely organized by chaperone proteins 4. Plasmids are easily transferred
- Plasmids are considered transferable genetic elements, or "replicons", capable of autonomous replication within a suitable host. Plasmids can be removed from the host cell in the process of curing. Curing may

occur spontaneously or may be induced by treatments such as ultraviolet light. Certain plasmids, called episomes, may be integrated into the bacterial chromosome. Others contain genes for certain types of pili and are able to transfer copies of themselves to other bacteria. Such plasmids are referred to as conjugative plasmids. 5. Plasmids usually contain non-essential genes

- Plasmids have relatively few genes (fewer than 30). The genetic information of the plasmid is usually not essential to survival of the host bacteria. 6. Plasmids function can be lost or gained without harming the organis GENOMIC DNA VS PLASMID IN BACTERIA.

1. Genomic DNA contains genes necessary

for...
tracking img