double helix- a pair of parallel helices intertwined about a common axis; "the shape of the DNA molecule is a double helix" helix,spiral- a curve that lies on the surface of a cylinder or cone and cuts the element at a constant angle ...
The meaning of DOUBLE HELIX is a helix or spiral consisting of two strands in the surface of a cylinder that coil around its axis; especially : the structural arrangement of DNA in space that consists of paired polynucleotide strands stabilized by cross-
The meaning of DOUBLE HELIX is a helix or spiral consisting of two strands in the surface of a cylinder that coil around its axis; especially : the structural arrangement of DNA in space that consists of paired polynucleotide strands stabilized by cross-
More than seven decades later, mathematician Robert Monjo believes he has discovered a similarly significant double helix — but this time not as the structure of human DNA, but as the structure of spacetime itself. FromSalon The enigma emerged in the 1950s, when biologists discovered that the ...
1. Twice as much in size, strength, number, or amount: a double dose. 2. Composed of two like parts: double doors. 3. Composed of two unlike parts; dual: a double meaning; a double role for an actor. 4. Accommodating or designed for two: a double bed; a double room. 5. Charac...
"This [double helix] structure has novel features which are of considerable biological interest.(Opening sentence of theNaturearticle announcing Crick and Watson's discovery of the structure of DNA) "Last night, I experienced something new, an extraordinary meal from a singularly unexpected source. ...
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phosphate backbone. The nucleotide strands form a spiral double helix that looks similar to a ladder. The sides of the ladder consist of sugar and phosphate molecules. The middle rungs are formed by the base pairs (and the hydrogen bond). Nucleotides are the building blocks of nucleic acids....
DNA (deoxyribonucleic acid) is a type of macromolecule known as anucleic acid. It is shaped like a twisteddouble helixand is composed of long strands of alternating sugars and phosphate groups, along with nitrogenous bases (adenine, thymine, guanine, and cytosine). DNA is organized into structur...
comparison, DNA has two long strands of sugars and phosphates, with the base pairs between them, making it look like a spiraled ladder (adouble helix).RNAhas three of the same nitrogen bases found in DNA—adenine(A),guanine(G), andcytosine(C). Instead ofthymine(T), though,RNAhasuracil...