The bases are at the interior of the double helix and are neatly stacked.
The phosphate groups groups are at the exterior of the DNA molecule
The sugar groups are at the interior of the DNA molecule
Answer:
Models are used for understanding a process or phenomenon.
Explanation:
Advantages of using models:
1) It gives some information about the human impacts on earth's systems and carbon cycle.
2) It also helps in discovering the defects and errors.
Disadvantages of using models:
1) It did not fully explain the human impact on both earth and carbon cycle.
2) It is the simplified version not an actual version of the real situation of carbon cycle.
Bicarbonate ion is important organic molecule in the buffering system of blood.
