. How many genes are needed to sustain life? 2. Using a flow diagram, trace the history of the discovery of the DNA as the genetic material? 3. Following Chargaff’s rule, what is the percent concentration of other nitrogenous bases if the concentration of Adenine is 21%?

Biology 2e
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ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark
Chapter14: Dna Structure And Function
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Problem 11RQ: How did Meselson and Stahl support Watson and Crick’s double-helix model? They demonstrated that...
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1. How many genes are needed to sustain life?
2. Using a flow diagram, trace the history of the discovery of the DNA as the genetic material?
3. Following Chargaff’s rule, what is the percent concentration of other nitrogenous bases if the concentration of Adenine is 21%?
4. In the double helix model of DNA by Watson and Crick, what is the distance between successive bases and how many base pairs will complete one full turn?
5. Based on literature, the number of genes in the human genome is lower compared to rice but rice have fewer chromosomes and lesser amount of DNA than humans. What is the main reason for this difference in the DNA-gene ratio?
6. What are introns? Where are they located in the DNA?
7. What are exons? What is their function?
8. What proportion in the human genome are actual genes?
9. What sequences form most of the human genome? What is their significance in the expression of genes?
10. What are tandem repeats?

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