Alert icon
We're changing our privacy policy. This stuff matters.  Learn more  Dismiss

DNA Structure

Loading...

Sign in or sign up now!
Alert icon
Upgrade to the latest Flash Player for improved playback performance. Upgrade now or more info.
4,961
Loading...
Alert icon
Sign in or sign up now!
Alert icon

Uploaded by on Dec 15, 2010

The DNA structure consists of two chainlike molecules (polynucleotides) that twist around each other to form the classic double-helix. The cell's machinery forms polynucleotide chains by linking together four nucleotides. The nucleotides which are used to build DNA chains are adenosine (A), guanosine (G), cytidine (C), and thymidine (T). The DNA structure houses the information required to make all the polypeptides used by the cell. The sequence of nucleotides in DNA strands (called a 'gene') specifies the sequence of amino acids in polypeptide chains.

Clearly a one-to-one relationship cannot exist between the four nucleotides of DNA and the twenty amino acids used to assemble polypeptides. The cell therefore uses groupings of three nucleotides (called 'codons') to specify twenty different amino acids. Each codon specifies an amino acid.

Because some codons are redundant, the amino acid sequence for a given polypeptide chain can be specified by several different nucleotide sequences. In fact, research has confirmed that the cell does not randomly make use of redundant codons to specify a particular amino acid in a polypeptide chain. Rather, there appears to be a delicate rationale behind codon usage in genes.


DNA structure -- Information and Design
The molecular constituents of the DNA structure appear to have optimized chemical properties to produce a stable helical structure capable of storing the information required for the cell's operation. Detailed accounts of how such an optimized structure for the cell's most fundamental information storage medium could have arisen naturally have not been produced. To suppose that such extensive optimization could have come into being by blind chance is a far greater leap of faith than many would be willing to take.

For more specifics on the DNA structure, please visit http://www.allaboutscience.org/dna-structure.htm

Category:

Education

Tags:

License:

Standard YouTube License

  • likes, 14 dislikes

Link to this comment:

Share to:

Top Comments

  • "Science has proof without any certainty. Creationists have certainty without any proof." Ashley Montagu

  • Douche bag.

see all

All Comments (64)

Sign In or Sign Up now to post a comment!
  • i think we can become dr. after see this.

  • It's had 3 billion years of random movements and the evolution to fit molecules together and then structure properly.

  • @TheScienceFoundation Well that's my point. The bible is actually a collection of different books that were bound together after-the-fact. That's important to understand. And speaking of ciphers, these stories are actually an interesting form of cryptography. The stories contain allusions to Jesus Christ in hundreds of various ways. So they were locked and nobody even knew they were prophetic until after Christ died and rose again. This was likely to prevent impostors.

  • @thewordofgod2010 The prophecies themselves being made go in the bible, sure. But the fulfillment of them would have to be extra-biblical to have any legitimacy. Otherwise, would you accept any prophecy written in a text that was also supposedly recorded as confirmed in the same text? If not, why not?

  • @TheScienceFoundation How much have you studied the bible? The problem with your thinking is it's self-defeating. Where do you think God would record these prophecies if not in the bible? And then why would such a book not be included in the bible if it existed? And why would you except it if it wasn't in the biblical canon? The very reason those books are bound together is because they are deemed to be inspired.

  • @thewordofgod2010 The bible is a collection of works which only partially keeps consistent with its own story line, using the bible alone to confirm a story within the bible will always be circular logic. I'd like actual demonstrably fulfilled specific prophecies if you have them, not the biblical 'wheel of power'

  • @TheScienceFoundation We know that the story of Jonah predates the New Testament by 700-800 years. The bible is actually a library of books so it's not circular logic as long as don't use a single book to confirm itself. This is only one of many prophecies in this form from the OT. Christ actually claimed the OT was pointing to him. It does amazingly. Want more?

  • @thewordofgod2010 Is that confirmed in any way outside of the claim of the bible?

  • @TheScienceFoundation Ok. Jesus said he would offer up one proof, "the sign of Jonah." Have you read any of the New Testament? Anyway, it turns out the story of Jonah is actually a prophecy of Christ's death and resurrection. In summary, Jonah sacrificed himself to save his shipmates from the wrath of God. Jonah was in the belly of a "great fish" (really dead) for three days and nights and was alive again. This prophecy mirrors Christ's three days and three nights in the grave....

  • @thewordofgod2010 Evolution was never intended to explain origins, but it does explain diversity in astonishing detail with mountains of corroborating data.

    Sure, I'm up for it.

Loading...
Alert icon
0 / 00Unsaved Playlist Return to active list
    1. Your queue is empty. Add videos to your queue using this button:
      or sign in to load a different list.
    Loading...Loading...Saving...
    • Clear all videos from this list
    • Learn more