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Questions tagged [dna-helix]

The structure formed by the double-stranded DNA molecules.

28
votes
3answers
3k views

Does any molecule other than DNA have a double-helical structure?

DNA is known to have a double-helical structure. Do any other molecules have this structure?
1
vote
1answer
69 views

At what point, when connected, do DNA strands become a helix?

When synthesizing DNA strands and beginning to "connect" them, how quickly does it become a helix? In this answer, canadianer says The helical structure is more stable than the "straight" form (...
6
votes
2answers
1k views

Twist in the DNA double-helix

DNA, has a deoxyribose sugar — phosphate backbone with the purine and pyrimidine bases, adenine, cytosine, thymine, and guanine connected to the deoxyribose sugar. (The base–sugar molecules are ...
6
votes
2answers
715 views

Sections Of DNA

I know what major (2.2 nm) and minor (1.2 nm) groves are, but what is then name for: a 360-degree rotation of DNA (3.4 nm) the gap between each base pair (0.34 nm)?
2
votes
0answers
83 views

Do mutations come in pairs? [closed]

As DNA is organized in a double-helix, a change in one strand must be accompanied by a corresponding change in the other strand. Let's say an original sequence CATCAT mutates into CATGAT. The other ...
13
votes
1answer
448 views

What limits chromosomal length?

What are the upper and lower limits for chromosome length? Are these limits different in different species or kingdoms? If there is any limit, which cellular or molecular factors are reasons?