Dictionary » D » DNA




A double-stranded nucleic acid that contains the genetic information for cell growth, division, and function.


Structure: DNA is composed of two strands that twist together to form a helix. Each strand consists of alternating phosphate (PO4) and pentose sugar (2-deoxyribose), and attached on the sugar is a nitrogenous base, which can be adenine, thymine, guanine, or cytosine. In DNA, these bases pair; adenine pairs with thymine and guanine with cytosine. Hence, DNA is a ladder-like helical structure.

Location: DNA is found in the cytoplasm of prokaryotic cells, and chiefly in the nucleus of eukaryotic cells. A small fraction of total DNA is present in mitochondria and chloroplasts.

Function: DNA is a long polymer of nucleotides to code for the sequence of amino acid during protein synthesis. DNA is said to carry the genetic ‘blueprint’ since it contains the instructions or information (called genes) needed to construct cellular components like proteins and RNA molecules.

Word origin: abbreviation of deoxyribonucleic acid.
See also: gene, base pair, genetic code, RNA.

Please contribute to this project, if you have more information about this term feel free to edit this page

Results from our forum

Re: Totipotent Stem Cell From Molecular Components

... Last but not least, before I put the protein in the organelle I separate it from the protein synthesis enzymes using a centrifuge. As far as the DNA side of things first I do DNA extraction(in this case of my own DNA). I then separate the chromosomes using differential centrifugation. Next I ...

See entire post
by caters
Fri Aug 01, 2014 1:42 am
Forum: Cell Biology
Topic: Totipotent Stem Cell From Molecular Components
Replies: 2
Views: 2263

Hypothetical question about vampires

... the fangs) and then the environment would return to normal and odontoblasts would be able to build new teeth. Couple that with a change in the DNA of odontoblasts and the new teeth would become fangs. Now, my knowledge in the field of biology is about highschool level, so if I'm missing something ...

See entire post
by eugene2k
Mon Jul 28, 2014 2:30 pm
Forum: General Discussion
Topic: Hypothetical question about vampires
Replies: 1
Views: 420

mitosis and miosis

... Mitosis- The division of a cell to create two identical new cells. Meiosis- The division of a cell into a gamete, carrying half the genetic DNA of a normal cell, to fertilize another gamete (Example, sperm fertilizing an egg)

See entire post
by CaptainCovalency
Thu Jul 10, 2014 3:58 am
Forum: Cell Biology
Topic: mitosis and miosis
Replies: 2
Views: 1574

Bioinformatics Hands-On NGS Data Analysis Workshops 2014

... will cover the essential steps of small RNA-seq analysis from microRNA prediction to extensive downstream analyses. We also have a workshop on DNA Methylation Analysis where Helene Kretzschmer will show you how she took care of her data in the MMML-Seq study of the International Cancer Genome ...

See entire post
by ecSeq
Mon Jul 07, 2014 2:54 pm
Forum: General Discussion
Topic: Bioinformatics Hands-On NGS Data Analysis Workshops 2014
Replies: 0
Views: 630

Re: Is DNA living or non-living thing?? get the answer here

אבולוציה היא תולדת כח המשיכה כל כמות החומר ביקום קבועה מאז החל היקום להשתחזר בפעם האחרונה, מאז ה"אחדיות"האחרונה שלו, מאז גרעין הלידה האחרון של היקום טרום המפץ הגדול האחרון. כל תחומי המדע ("דיסציפלינות") נובעים מן, מתחילים ונגמרים, מתפתחים ונמשכים בהכוונת ובמסגרת כח המשיכה. הכל בכ...

See entire post
by Dov Henis
Fri Jul 04, 2014 8:00 am
Forum: Molecular Biology
Topic: Is DNA living or non-living thing?? get the answer here
Replies: 24
Views: 52495
View all matching forum results

This page was last modified 09:02, 22 June 2008. This page has been accessed 215,273 times. 
What links here | Related changes | Permanent link