newpolitics
vegan atheist indy
- Sep 27, 2008
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UR, you never answered my question about DNA.
You claim that DNA is digital, yet the DNA code is quaternary, and digital code is binary. How are you therefore able to call DNA "digital"?
I did answer your question. You missed it. And your post shows a lack of understanding of what digital is. Do you know what analog is? Do you know the difference between music stored on an LP record and music stored on a CD? Your fallacy comes from your belief that Binary code is the only type of digital code. It isn't.
http://www.usmessageboard.com/religion-and-ethics/190358-creationists-640.html#post6256797
Just google it for goodness sake!!! You will be hard pressed to find one your atheist websites to dispute the fact dna is digital code.
"The discovery of the structure of DNA transformed biology profoundly, catalysing the sequencing of the human genome and engendering a new view of biology as an information science. Two features of DNA structure account for much of its remarkable impact on science: its digital nature and its complementarity, whereby one strand of the helix binds perfectly with its partner. DNA has two types of digital information — the genes that encode proteins, which are the molecular machines of life, and the gene regulatory networks that specify the behaviour of the genes."
http://www.nature.com/nature/journal/v421/n6921/full/nature01410.html
"When it comes to storing information, hard drives don't hold a candle to DNA. Our genetic code packs billions of gigabytes into a single gram. A mere milligram of the molecule could encode the complete text of every book in the Library of Congress and have plenty of room to spare. All of this has been mostly theoretical—until now. In a new study, researchers stored an entire genetics textbook in less than a picogram of DNA—one trillionth of a gram—an advance that could revolutionize our ability to save data."
DNA: The Ultimate Hard Drive - ScienceNOW
"DNA code is a sequence of chemicals that form information that control how humans are made and how they work. It is a digital code but it is not binary, but quaternary with 4 distinct items. The encoding information in an ordered sequence of 4 different symbols called "bases", typically denoted A, C, G, and T.
A: adenosine
C: cytosine
G: guanine
T: thymine
These 4 substances are the fundamental "bits" of information in the genetic code, and are called "base pairs" because there is actually 2 substances per "bit", as discussed later. Everything else is built on top of this basis of 4 DNA digits."
Introduction to Genes and DNA - RightDiagnosis.com
The longest term correlations in living systems are the information stored in DNA which reflects the evolutionary history of an organism. The 4 bases (A,T,G,C) encode sequences of amino acids as well as locations of binding sites for proteins that regulate DNA. The fidelity of this important information is maintained by ANALOG error check mechanisms. When a single strand of DNA is replicated the complementary base is inserted in the new strand. Sometimes the wrong base is inserted that sticks out disrupting the phosphate backbone. The new base is not yet methylated, so repair enzymes, that slide along the DNA, can tear out the wrong base and replace it with the right one. The bases in DNA form a sequence of 4 different symbols and so the information is encoded in a DIGITAL form. All the digital codes in our society (ISBN book numbers, UPC product codes, bank account numbers, airline ticket numbers) use error checking code, where some digits are functions of other digits to maintain the fidelity of transmitted information. Does DNA also utilize a DIGITAL error checking code to maintain the fidelity of its information and increase the accuracy of replication? That is, are some bases in DNA functions of other bases upstream or downstream? This raises the interesting mathematical problem: How does one determine whether some symbols in a sequence of symbols are a function of other symbols. It also bears on the issue of determining algorithmic complexity: What is the function that generates the shortest algorithm for reproducing the symbol sequence. The error checking codes most used in our technology are linear block codes. We developed an efficient method to test for the presence of such codes in DNA. We coded the 4 bases as (0,1,2,3) and used Gaussian elimination, modified for modulus 4, to test if some bases are linear combinations of other bases. We used this method to analyze the base sequence in the genes from the lac operon and cytochrome C. We did not find evidence for such error correcting codes in these genes. However, we analyzed only a small amount of DNA and if digital error correcting schemes are present in DNA, they may be more subtle than such simple linear block codes. The basic issue we raise here, is how information is stored in DNA and an appreciation that digital symbol sequences, such as DNA, admit of interesting schemes to store and protect the fidelity of their information content. Liebovitch, Tao, Todorov, Levine. 1996. Biophys. J. 71:1539-1544. Supported by NIH grant EY6234.
What Information is Stored in DNA: Does it Contain Digital Error Correcting Code
I stand corrected on the meaning of digital, although this is somewhat unimportant, because to say something is digital is not terribly descriptive. All it means is the information comes in discrete, non-continuous bites, as opposed to analog information which comes in a continuous form, like sound. Smoke signals from a campfire used to communicate something is also digital information. So, describing DNA as digital isn't very helpful. In fact, I couldn't imagine it any other way. If the information was analog, that would be far more amazing, and greater "evidence" of an intelligence. I can't even imagine how that would work. The fact that DNA is digital is not, by itself, amazing or good. Therefore, comparing to our own digital codes and simply concluding that there must be an intelligence is even more meaningless. Of course, you add on the descriptors "specifiable and complex." Whoopee. First of all, complexity is not a sign of intelligence. Simplicity usually is, when we are talking about making something actually work. And, how else would DNA work were it not specifiable??? You would expect these attributes of DNA to exist. If they weren't specifiable or Complex, then that would be truly amazing, and would be greater evidence for an intelligence, because that would beg the question: how is this possible??
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