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Circular dna

Circular dna

(Science: molecular biology) C.f. Linear dna.

Examples: plasmids, bacterial, mitochondrial, chloroplast and some viral genomes.


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How did endosymbionts coordinate replication?

Another question about mtDNA: what is the advantage to/role of having multiple copies of the same circular DNA molecule? Isn't that "too much of a dose" of the same given gene? Any mitochondria ...

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by kk
Fri Jun 06, 2014 12:16 pm
 
Forum: Cell Biology
Topic: How did endosymbionts coordinate replication?
Replies: 11
Views: 4837

Fossil rabbits in the Precambrian!

... animals cannot exist before the first animal. Easy. (Ignore the awful usage of animal when talking about Cambrian/Precambrian) But it also seems circular. It seems like one needs to assume evolution is true in order to make this claim. However, I see this claim used often as a potential way to ...

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by Steiner
Sun Dec 22, 2013 8:25 pm
 
Forum: Evolution
Topic: Fossil rabbits in the Precambrian!
Replies: 0
Views: 1990

I am having difficulty identifying this structure.

... images relate to the same structure but in a different perspective.) My instinct is telling me that it may be a part of stacks of grana being circular in structure on image C and has a stacked appearance on D. But I am not certain since I have not done this kind of identification on such a ...

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by omegad
Sun Dec 01, 2013 7:11 am
 
Forum: Cell Biology
Topic: I am having difficulty identifying this structure.
Replies: 6
Views: 2378

The question about TATA sequence flexibility

Good day :) We know that: The TATA box is the sequence in DNA found in the promoter region of genes in archaea and eukaryotes that is ... are stretched and contracted when bending the DNA molecule (in case of circular DNAs)? http://i.imgur.com/wjkrwzw.jpg

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by Fantomas
Sat Aug 31, 2013 10:57 am
 
Forum: Molecular Biology
Topic: The question about TATA sequence flexibility
Replies: 1
Views: 1781

MOLECULAR CLONING

... to mention, that synthesized oligos have 5'-OH and 3'-phosphate ends... DNA ligase removes 3'-phosphates and replaces it with -OH. Thus, synthesized ... on this? Will those nick be gone and will bacteria amplify intact circular dsDNA plasmids? tx

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by kk
Fri Jul 19, 2013 12:50 pm
 
Forum: Molecular Biology
Topic: MOLECULAR CLONING
Replies: 9
Views: 5573
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