Tipuri de ADN Flashcards

1
Q

Unde gasim ADN de tip A?

A

1.in concentratii saline mari si in cazul deshidratarii partiale
2.prezent ,,in vivo’’ -> in regiunea dublu
catenara din mol de ARN (prezenta
grupei hidroxil-2’ impiedica adoptarea
tipului B) -> duplexuri ADN-ARN`

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2
Q

Unde gasim ADN de tip Z?

A
  1. intalnim in polimerii care au secventa de baze purinice si pirimidinice alterate
  2. in conditii ‘‘in vitro’’, folosind c% ridicata de saruri
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3
Q

Cate nucleotide se afla pe pas la ADN de tip A?

A

11pb/tur

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4
Q

Cate nucleotide se afla pe pas la ADN de tip Z?

A

12pb/tur

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5
Q

Cate grade sunt pe tur complet de ADN de tip B?

A

34 grade pe tura

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6
Q

Cate grade se afla pe pas la ADN de tip A?

A

28 grade pe tura

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7
Q

Cate grade se afla pe pas la ADN de tip Z?

A

-30 grade pe tura

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8
Q

Diametrul ADN de tip A

A

23 A

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9
Q

Diametrul ADN de tip B

A

19 A

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10
Q

Diametrul ADN de tip Z

A

18 A

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11
Q

Proprietati ADN de tip Z

A
  1. este posibila tranzitia B->Z
  2. dubletele G-c pot fi convertite Z, A-T nu
  3. caracterizat prin existenta unor baze purinice si pirimidinice alaturate, repetate
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