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First off - it is important to understand that a nucleotide (the monomer of DNA) is composed of 3 things: a sugar, a phosphate group, and a nitrogenous base. Next - understand that the "backbone" of DNA is composed of the sugars and phosphates.

That leaves you with nitrogenous bases. Hydrogen bonds form between the nitrogenous bases off opposite strands in the double helix. THIS is what holds the double helix together.

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15y ago
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12y ago

Deoxyribose sugars and phosphate groups that are connected by phosphodiester bonds.

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Q: What holds the two helixes in a DNA molecule together?
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Related questions

What is a single helix molecule?

A DNA molecule has the shape of a double-stranded helix.


What holds together 2 strands of a DNA molecule?

Hydrogen bonds.


What hold the side of DNA ladder together?

what holds the sides of the DNA ladder together


What kind of bond holds the two strands of a DNA molecule together?

hydrogen bonds. The other bonds are covalent bonds.


What holds two strands of dna molecule to each other?

The two strands of DNA are held together by hydrogen bonds between the nitrogen base pairs.


The types of helixes found in DNA?

a double helix


Which organelle holds genetic information in the molecule DNA?

Vacuole


What holds the strands of a DNA molecule to each other?

Hydrogen bonds


What holds the two strands of DNA molecule each other?

hydrogen bonds


What holds the two strands of a DNA molecule of each other?

Hydrogen bonds


How is a DNA molecule held together and separated by?

A DNA molecule is held together by its hydrogen bonds. The bonds are in between the bases of the molecule, for example cytosine and guanine. Because hydrogen bonds are weak, they are able to break apart easily and split when the molecule needs to be separated to bond with another DNA molecule for reproduction.


What holds a single DNA strand together?

the nucleus