Very dumb question

[Transformers]

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sorry...but is bacterial and mitochondrial dna single-stranded or double?

 

[capn jazz]

double

 

[loveoforganic]

I thought they had circular DNA >.< hate bio!

 

[capn jazz]

You can have double-stranded circular DNA! I believe both bacteria and mitochondria have that, in fact.

 

[loveoforganic]

Oh, good news 😀 Just assumed circular DNA was single stranded for some reason, never really thought about it!

 

[sv3]

only time ive seen single stranded DNA is in viruses. Oh and fungi are haploid....(so they only have one copy meaning one strand.....i think)

 

[LoveWalk]

Ummm...haploid means having one set of each gene

each gene consists of a region of DOUBLE STRANDED DNA

so....

diploid cells have 23 pairs of chromosomes

Meaning 46 MOLECULES OF DOUBLE STRANDED DNA

comprende?

 

[sv3]

i'm beginning to hate myself a great deal....................

 

[FuturaDocta]

Isn't circular dna called plasmids?

 

[loveoforganic]

I believe so.

 

[G1SG2]

Isn't circular dna called plasmids?

It is only a plasmid if it can replicate independently of the bacterial genome (which is also circular).

 

[Charles_Carmichael]

It is only a plasmid if it can replicate independently of the bacterial genome (which is also circular).

Yup. Circular DNA doesn't automatically mean it's a plasmid.

 

[Doodl3s]

CIRCULAR double-stranded DNA is in prokaryotes, mitochondria and chloroplasts. A plasmid is a much smaller piece of circular DNA (although there is no specific cutoff as to what size constitutes) that gets replicated independently.

Haploid means one set of chromosomes (although it does not designate how many copies there are, it just means it only has one allele per gene) (a diploid has a mom and pop's version of each gene, homologous)
and yes fungi are haploid for MOST of the life cycle... they go diploid briefly for spore/reproductive purposes...

and lastly how come no has chimed in with

"there's no such thing as a stupid question" 😀