Question

A double-stranded DNA having 100,000 bp will have a length of
(a) 10,000 nm
(b) ${ 10 }^{ 5 }$ nm
(c) $3.4{ \times 10 }^{ 4 }$ nm
(d) 200,000 nm

Answer 1

Hint: Genetic material DNA is a double helix; a full double helix turn is 3.4 nm long, with 10 baselines each, which means that there would be a difference of 3.4/10 to 0.34 nm between two consecutive base pairs.

Complete answer:
As we know, the DNA is a two-helix; a full turn of the double helix is 3.4 nm long with ten base pairs, each of which is 3.4/10 = 0.34 nm. The DNA of 100,000 bp has a length of $3.4{ \times 10 }^{ 5 }$ nm = $3.4{ \times 10 }^{ 4 }$ nm, and is thus double-stranded.

Additional Information: Nucleic acids constitute the organic substances in the form of DNA or RNA found in all organisms. These nucleic acids are formed by a combination of nitrogen bases, sugar, and phosphate groups, which is a series of sequences that are bound by different bindings. The genetic composition of our body is established by the DNA structure. Indeed, the genetic composition of almost every life on earth is established.
DNA also plays a significant role in the development of proteins, not only inheriting genetic material in all living entities. Nuclear DNA is the DNA inside a eukaryotic organism in the nucleus of each cell. They are coding most of the genomes of the organism while mitochondrial DNA and plastid DNA are managing the remainder.
So, the answer is, “$3.4{ \times 10 }^{ 4 }$ nm.”

Note: -DNA is a group of molecules that carries and transfers inherited or genetic materials from their parents to their offspring.
-This also refers to viruses because most of these organizations have genetically engineered RNA or DNA. For example, some viruses have genetic material RNA, while others have genetic material DNA. The human immunodeficiency virus (HIV) contains RNA which, when attached to the host cell, becomes DNA.
- A mitochondrial DNA is classified as mitochondrial DNA in the cell mitochondria. It's a legacy from mother to son. In humans, the base pairs of mitochondrial DNAs are around 16,000. Plastids also have their DNA, and in photosynthesis, they play an important role.