Notes on DNA
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Genes are segments of DNA that contain instructions for making proteins or controlling cell functions. DNA stores and transmits genetic information found within all living things, telling cells which proteins to make and when. DNA is located in the nucleus of cells and forms tightly coiled structures called chromosomes. In 1953, Watson and Crick discovered that DNA has a double helix structure with two nucleotide chains wrapping around each other.
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Notes on DNA
- 1. What are genes? (4 min) Bill Nye http://www.youtube.com/watch?v=V9BZ3zx8b8I&feature=related
- 2. Meaning: Importance: Description: Where is it located? Title: The DNA Date: August 27,2012 Summary:
- 5. Chromosome: a coiled, double rod-shaped form of condensed DNA that forms during cell division.
- 7. DNA is a complex molecule found in all living things. The primary function of DNA is tostore and transmit genetic information that tells cells which proteins to make and when to make them.
- 8. An idea about size: An average cell nucleus is about 6 micrometers in diameter. The total length of the DNA in the human genome is 1.8 meters. There must be several levels of coiling and supercoiling in DNA.
- 9. In 1953, James Watson and Francis Crick proposed a model for the DNA molecule that consisted of two nucleotide chains that wrap around each other to form a double spiral. This shape is called a double helix.