The building block of DNA is called the nucleotide, which is composed of a nitrogenous base (adenine, guanine, cytosine, or thymine), a five-carbon sugar (deoxyribose in DNA), â¦ and one to three phosphate groups.+ 16 others found this useful. Kenneth Huynh.he building block of DNA is called the nucleotide, which is composed of a nitrogenous base (adenine, guanine, cytosine, or thymine), a five-carbon sugar (deoxyribose in DNA), â¦ and one to three phosphate groups. + 16 others found this useful. Kenneth Huynh.
So, to answer your question - yes, they are different. localhost is given an ip address in the 127.0.0.0 network and given to a virtual loopback network device lo. This device is present on all systems, regardless of whether they have a physical network device fitted (WiFi or Ethernet, for example).
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