What defines a chromosome in prokaryotes?

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Solution

Prokaryotes: These are single-celled organisms that lack membrane-bound organelles including a nucleus.
Chromosomes:
The chromosome is a thread-like structure that bears genes and is enclosed within a nucleus.
It is composed of DNA and proteins.
Prokaryotic chromosomes:
DNA in prokaryotes is in the form of a single, double standard loop as opposed to the linear eukaryotic chromosomes.
These naked loops of DNA attach to the inner membrane of the prokaryote.
These are also small, free-floating loops of DNA called plasmids in bacteria.

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Fill in the gaps in the following table illustrating differences between prokaryotic and eukaryotic cells.

	Prokaryotic cell		Eukaryotic cell
1.	Size: generally small ( 1-10 µm) 1 µm== 10^-6 m	1.	Size: generally large (5-100 µm)
2.	Nuclear region: _____________________________ and is known as ________.	2.	Nuclear region: well-defined and surrounded by a nuclear membrane
3.	Chromosome: single	3.	More than one chromosome
4.	Membrane-bound cell organelles are absent	4.	________________________________________________________________________________________________

Do Prokaryotes have a chromosome?

How many chromosomes are present in a prokaryotic cell?

Differentiate between prokaryotic and eukaryotic chromosomes?

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