DNA = Deoxyribonucleic acid (DNA) is a molecule that encodes the genetic instructions used in the development and functioning of all known living organisms

1. DNA Types
By Pankaj Kukreti

2. What Is DNA ?
• Deoxyribonucleic acid (DNA) is a molecule
that encodes the genetic instructions used in the
development and functioning of all known living
organisms and many viruses.

4. A-DNA
Right-handed
double helix
 Base Pair along
axis 2.4 Å

5. A-DNA Upper View
Diameter 23 Å
(2.3 nm)
Turn of helix
24.6 Å

6. B-DNA
Right-handed
double helix
 Base Pair
along axis 3.4 Å

7. B-DNA Upper View
Diameter 20 Å
(2.0 nm)
Turn of helix 33.2 Å
(3.32 nm)

8. Z-DNA
Left-handed
double helix
Base Pair
along axis 3.7 Å

9. Z-DNA Upper View
Diameter 18 Å
(1.8 nm)
Turn of helix
45.6 Å (4.56 nm)

10. C-DNA
Right handed
double helix
Having
relatively
low humidity

11. C-DNA Upper View
Presence of
certain ions like
Li+ or Mg2+

13. 1. These are Those DNA
In Which Both End are
Free
2. Present in Nucleus of
Eukaryotic Cell
Linear DNA

14. Circular DNA
1. DNA Which Doesn’t
have Free End
2. These DNA Present In
Nucleoid Region Of
Prokaryotic Cell

15. Trophic & Genetic DNA
In Some Animal Like
Paramecium .There
Are Two Type Of DNA
Found Trophic (Macro)
& Genetic (micro) DNA

16. Genetic DNA
Genetic DNA Present
In Micro-nucleus &
Transfer From One
Generation To
another Generation

17. Trophic DNA
Trophic DNA Present
In Macronucleus &
Not Tranfer From
One generation To
another