hydrogen bonds
Base pairs in DNA molecules are held together by hydrogen bonds between the nitrogenous bases.
hydrogen bonds
The nitrogen bases are held together by hydrogen bonds.
A tuft is a bunch of feathers, grass, or hair held together at the base.
The backbone of the nucleotides are composed of repeating ribose (in RNA) or deoxyribose (in DNA) and phosphates held together by phosphodiester bonds between the 5's and 3's of the ribose/deoxyribose.
The two chains of a DNA double helix are held together by hydrogen bonds between complementary base pairs. Adenine pairs with thymine, and cytosine pairs with guanine. These hydrogen bonds form the base pairs that hold the two strands of DNA together.
The DNA strands are held together by hydrogen bonds between complimentary base pairs.
They are held together by ligaments.
hydrogen bonds between complementary nitrogenous bases.
On a single strand of DNA the nucleotides are held together by covalent bonding between the phosphate group bonded to the 5' end of the deoxyribose, which bonds to another deoxyribose molecule attached to the next nucleotide on the strand at the 3' end of the sugar. This is what holds together a single strand. When two strands of DNA that have exactly complementary base pairing (Adenine bonds with only Thymine, and Cytosine with Guanine) the base forms a hydrogen bond to the base on the opposite strand, only if the base pairing is complementary. So, in short the double helix form is held together by hydrogen bonds between the bases present on the strand.
The two strands of DNA are held together by hydrogen bonds.
they are not held together.