spiral chains
DNA is shaped like a double helix also known as a "twisted ladder".
spiral chains
double helix
Bacteria are prokaryotes, that is, the DNA molecule is not enclosed in a membrane-bound nucleus as it is in the eukaryotes. In bacteria the DNA lies free in the cytosol in a region known as nucleoid. This is denser than the rest of the cytosol because of the presence of DNA and related protein molecules. Also the DNA in bacteria is not broken up in thread-like chromosomes but is a ring-like circular and continuous structure.
Watson and Crick
DNA is shaped like a double helix.
A strand of DNA is shaped like a double-helix.
Chromosome.
The DNA molecule is shaped like a ladder that is twisted into a coiled configuration called a double helix.
the whole DNA strand looks like a twisted ladder. the molecules are on the strand.
DNA replication begins in areas of DNA molecules are called origins of replication.
T-shaped molecules can be polar or nonpolar, depending on the atoms involved and the overall molecular structure. For example, a T-shaped molecule like ClF3 is polar due to the uneven distribution of electron density caused by the different electronegativities of the atoms. On the other hand, a T-shaped molecule like SF4 is nonpolar because the dipole moments cancel each other out.