Question

microbial genetics*

what is the difference between plasmaids and chromosomes?

who has chromosomes?

who has plasmids.?

who has organellular DNA.?

Answer 1

1. Difference between plasmid and chromosome -

PLASMID	CHROMOSOME
A small circular , double stranded DNA molecule that is distinct from a cell chromosomal DNA.	Chromosome is a thread like structures composed of DNA and proteins
Small in size	Large in size
For the survival not important	For the survival extremely important
Bacteria have variable number of plasmid DNA	Only one chromosome in bacteria and many in eukaryotes
Always circular	Can be circular or linear
Always double stranded	Double stranded or single stranded
Shows self replication , independently to genomic DNA replication	Replicate during cell division
Introns , exons and vital genes are absent .	Introns , exons and vital genes are present
Plasmids are used as gene carriers to an alien cell . hence used in genetic engineering.	Chromosomes are not used as gene carrier

2. Mainly eukaryotic organisms have chromosomess.

3. Bacteria contains plasmid

4. Organellular DNA is DNA contained in organelles, outside the nucleus of eukaryotic cells .