DQ1 - when they are needed to do its job. The other DNA...

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1. What are some of the benefits of squeezing so much data into virtually every cell in the body? A. The actual benefit of squeezing so much data into our cells is that our cell knows what to do and when to do it. A single DNA strand contains a complete description of everything about our physiology. It also contains the instructions on how to form our body by repeated divisions of a single cell. Each cell needs to know when it should, split into two, split into different kinds of cell for tissue separation. 2. Why did we not evolve with one central repository of DNA rather than having it replicated throughout the body? A. Our DNA contains instructions on how to make proteins. Each cell uses its own DNA to make the proteins that are needed,
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Unformatted text preview: when they are needed to do its job. The other DNA parts actually tell the body which cells to make, but even this job is done by another cell which splits, separates and turns into organs. 3. How could just four different bases in DNA strands be responsible for the almost endless variety found in nature? A. The DNA has four bases, represented by the letters A, T, C and G; the initials are of the chemical names for those bases. They are arranged in groups of three, each group being called a codon. So ATA is one codon, CGT is another. Even with only four letters, you can get many codons and that can make very complicated instructions. Pruitt, Nancy & Underwood, L. (2005). Bioinquiry: Making Connections in Biology (3rd Ed.). Wiley...
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This note was uploaded on 02/14/2010 for the course BIO 100 BIO/100 taught by Professor Ray during the Spring '09 term at University of Phoenix.

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