What defines one end of a DNA molecule as the 5’ end? a. What defines the other end at the 3’ end? b. When two strands of DNA are paired together to form a functional molecule, what is interesting to note about their 5’ and 3’ ends?

In a lab question, a student got a DNA solution that has a concentration of 243 ng/uL.  The question is to use this solution to prepare a new solution that is 50 uL in volume and 50 ng DNA/uL in concentration, and tell how much volume of the original DNA solution to use, and how much water to use.

What was the contribution of Rosalind Franklin to the discovery of DNA's structure?   A. X-ray diffraction images of DNA that showed that DNA had two chains twisted into a double helix with a backbone containing phosphate groups on the outside and bases on the inside   B. Theoretical model of DNA's structure and the pairing of nitrogenous bases   C. Discovery that in DNA the amounts of adenine and thymine were identical as were the amounts of guanine and cytosine

Does all DNA have a function? Is all of the DNA in your genome, for example, part of a gene? Explain (be specific).