User:Pat Palmer/sandbox/test3: Difference between revisions

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{| align=center style="width:70%; background-color: #f7f7a6; border: solid 3px #f2e0de; padding: 2px;" 
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|style="background-color:#e8edd6;"|'''<span>New Blog Post</span>'''
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|'''<big>[https://driftingharbor.wordpress.com/2022/12/16/why-save-citizendium-my-reason-number-1/ Why save Citizendium? My reason number 1.]</big>'''<br/>
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|<big>'''There is a backlog of membership requests reaching back several months, and I am handling them as quickly as possible.  Please fill out an [[CZ:Enquiry Form|Enquiry Form]] if you applied haven't heard from back.'''</big> [[User:Pat Palmer|Pat Palmer]] ([[User talk:Pat Palmer|talk]]) 10:49, 27 February 2023 (CST)
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<div style='text-align: right;'><small>''[[{{FeaturedArticleTitle}}|Continued]]...''</small></div>

Revision as of 13:18, 27 February 2023

New Blog Post
Why save Citizendium? My reason number 1.
 
There is a backlog of membership requests reaching back several months, and I am handling them as quickly as possible. Please fill out an Enquiry Form if you applied haven't heard from back. Pat Palmer (talk) 10:49, 27 February 2023 (CST)


Help Write Articles about our World

Welcome to Citizendium, a wiki for providing free knowledge where authors use their real names. We write the kinds of encyclopedia-style articles that Wikipedia can't write. We regard information as a public good and welcome anyone who wants to share their knowledge on virtually any subject. Our online community prides itself on being congenial and supportive.

Our goals have changed over the years. Please read more about who we are.

See Recent Changes—an overview of articles we are writing now.

Please help today!
Please make your donations here.
Donations go to keep our servers running. See our financial report.

Become a member--it's free!

Agriculture Earth Sciences Journalism Physics
Anthropology Economics Law Politics
Archaeology Education Library & Info. Sci. Psychology
Architecture Engineering Linguistics Religion
Astronomy Food Science Literature Robotics
Biology Games Mathematics Sociology
Business Geography Media Sports
Chemistry Health Sciences Military Theater
Classics History Music Topic Informant
Computers Hobbies Philosophy Visual Arts


Our help system and forum
Questions and answers to help you find the information you need

Article counts

Citable Articles (145)
Developed Articles (1,135)
Developing Articles (7,698)
Stubs (7,914)
(17,010 total articles)

The only source of knowledge is experience.
— Albert Einstein

       —add a quotation about knowledge or writing

Featured Article: DNA

DNA (Deoxyribonucleic acid) provides the genetic information necessary for the development and reproduction of all living organisms and is often described as a genetic blueprint.[1] Every living organism has its own DNA code that is organized in the ladder-like structure of the DNA molecule as a series of complementary paired molecules called bases. DNA is found within the nucleus of many cells, including those of animal and plant life.

Shown here are the four "letters" of DNA.

Each single strand of DNA is a long biopolymer composed of repeating units called nucleotides. A nucleotide is a base linked to a sugar and phosphate group which form a sugar/phosphate backbone. Attached to each sugar molecule (deoxyribose) is one of the four bases:

The corresponding deoxynucleosides are:

  • Deoxyadenosine[6]
  • Thymidine[7]
  • Deoxyguanosine[8]
  • Deoxycytidine[9]


Nuclear DNA is organized and stored as chromosomes within the nucleus. The nucleus is a double membrane separating the DNA from the cytoplasm of the cell enabling certain processing to occur prior to protein synthesis. Each chromosome holds hundreds or thousands of genes. A gene can be described in different ways but in general can be thought of as a whole unit of genetic information.

Footnotes

  1. ↑ All living organisms use DNA as their genetic material with the exception of some RNA viruses. Whether viruses are alive is also a debatable question among biologists since they do not qualify based on some the the prerequisites for life, such as having a metabolism].
  2. ↑ Adenine (HMDB0000034) in the Human Metabolome Database (HMDB).
  3. ↑ Thymine (HMDB0000262) in the Human Metabolome Database (HMDB).
  4. ↑ Guanine (HMDB0000132) in the Human Metabolome Database (HMDB).
  5. ↑ Cytosine (HMDB0000630) in the Human Metabolome Database (HMDB).
  6. ↑ Deoxyadenosine (HMDB0000101) in the Human Metabolome Database (HMDB).
  7. ↑ Thymidine (HMDB0000273) in the Human Metabolome Database (HMDB).
  8. ↑ Deoxyguanosine (HMDB0000085) in the Human Metabolome Database (HMDB).
  9. ↑ Deoxycytidine (HMDB0000014) in the Human Metabolome Database (HMDB).

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