Alternating deoxyribose sugar and phosphate groups.
Each strand is made up of a chain of nucleotides.The two strands are held together by hydrogen bonds between adenine and thymine and between guanine and cytosine. The hydrogen bonds of DNA are analogous to the rungs of a twisted ladder. The sugar-phosphate backbones of the double helix are analogous to the sides of a twisted ladder.
Nucleotides are found on the DNA twisted ladder as segments of the uprights and rungs.
In biology, a DNA molecule is offen compared to a twisted rope ladder. The two sides of the ladder are connected by "rungs" made from pairs of the four nucleotide bases, either adenine and thymine (A and T) or guanine and cytosine (G and C). These pairs provide a chemical "code" that stores genetic information.
A molecule of DNA consists of two strands of various chemical compounds that other chemicals carrying genetic information join together, much like ladder rungs hold ladder rails apart. The two strands joined with thousands of rungs look like a long rope ladder that has been twisted into the shape of a spiral, called a double helix.
Imagine a ladder, then twist it along it's length. Each side rail forms a helix (screw thread) shape. The alternating sugar-phosphate sequence are the side rails of the ladder the Purine and Pyrimidine Bases (A,G & C,T) are the rungs.
the whole DNA strand looks like a twisted ladder. the molecules are on the strand.
twisted rope ladder
the rails
the rails
The shape of a DNA molecule is called a Double Helix or a "Twisted Ladder"
The DNA molecule is shaped like a ladder that is twisted into a coiled configuration called a double helix.
Rung on a ladder and wrung for twisted.
Rung on a ladder and wrung for twisted.
DNA code is simple in structure.The double helix structure of the DNA molecule is like a long ladder twisted into a spiral.
Each strand is made up of a chain of nucleotides.The two strands are held together by hydrogen bonds between adenine and thymine and between guanine and cytosine. The hydrogen bonds of DNA are analogous to the rungs of a twisted ladder. The sugar-phosphate backbones of the double helix are analogous to the sides of a twisted ladder.
Watson and Crick's Name for the twisted ladder of DNA
Nucleotides are found on the DNA twisted ladder as segments of the uprights and rungs.