3.Are the bases on the interior or the exterior of the double helix? Are they randomly arranged or neatly stacked?
2.Are the phosphate groups on the interior or the exterior of the DNA molecule?
3.Are the sugar groups on the interior or the exterior of the DNA molecule?
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http://ircamera.as.arizona.edu/Astr2016/text/nucleicacid1.htm
To answer your questions about the placement of bases, phosphate groups, and sugar groups in the DNA molecule:
1. Bases: The bases (adenine, thymine, cytosine, and guanine) are located on the interior of the DNA double helix structure. They form hydrogen bonds with each other in a specific pattern: adenine pairs with thymine and cytosine pairs with guanine. This arrangement is known as complementary base pairing.
2. Phosphate Groups: The phosphate groups are located on the exterior of the DNA molecule. They are attached to the sugar backbone of each strand. The negatively-charged phosphate groups help to stabilize the structure of the DNA molecule.
3. Sugar Groups: The sugar groups (deoxyribose) are also located on the exterior of the DNA molecule. They are connected to the phosphate groups, forming the sugar-phosphate backbone of the DNA strands.
In summary, the bases are on the interior of the double helix, while the phosphate groups and sugar groups are on the exterior. The bases are neatly stacked and arranged in a specific pairing pattern, while the phosphate and sugar groups form the structural backbone of the DNA molecule.
1. The bases of a double helix DNA molecule are on the interior. They are neatly stacked in pairs, with adenine (A) paired with thymine (T), and guanine (G) paired with cytosine (C).
2. The phosphate groups are on the exterior of the DNA molecule. They form the "backbone" of the DNA strand, along with the sugar groups.
3. The sugar groups are also on the exterior of the DNA molecule. They are connected to the phosphate groups, forming the alternating sugar-phosphate backbone of the DNA strand.