When a solution of cesium chloride (CsCl) is subjected to high-speed centrifugation, a stable density gradient is formed. Meselson and Stahl found that when cell contents were subjected to centrifugation with a CsCl solution, a band of DNA formed at the CsCl density that matched the density of the DNA. This technique is called density-gradient centrifugation. The test tubes below show the results of density-gradient centrifugation of five different DNA samples. Assign letters a-e to the pictures above. DNA from E. coli cells grown in ^5N DNA from E. coli cells grown in ^14 N A 1: 1 mixture of DNA from cells grown in 14^N and cells grown in ^15 N A 1: 1 mixture of DNA from cells grown in 14^N and 15^N, heated (to disrupt hydrogen bonds) and cooled (to allow reannealing) DNA containing one strand of ^15 N-DNA and one strand of ^14 N-DNA
Answers: 1
Biology, 22.06.2019 09:00
Linda and julia are trying to determine whether their ideas are scientific or pseudoscientific. linda's idea is free of bias. julia's idea gives the same result when tested repeatedly. which statement is correct about linda and julia's idea?
Answers: 1
Biology, 22.06.2019 10:30
Which label correctly identifies what x represents in the concept map?
Answers: 2
Biology, 22.06.2019 10:30
Which of the following words best matches this definition: the process in which the best adapted organisms survive and pass on their traits, while those that are not well adapted do not survive to pass on their traits. question 3 options: acquired selection natural selection artificial selection organic selection
Answers: 1
Biology, 22.06.2019 14:10
Pls the table below shows the role of different substances during photosynthesis. substance role during photosynthesis glucose stores chemical energy water combines with glucose to form carbon dioxide chlorophyll traps sunlight which of the following statements would correct one of the roles listed in the table? glucose combines with carbon to form water. chlorophyll reacts with light to produce carbon dioxide. water combines with carbon dioxide during photosynthesis. chlorophyll stores chemical energy needed for photosynthesis.
Answers: 2
When a solution of cesium chloride (CsCl) is subjected to high-speed centrifugation, a stable densit...
History, 22.10.2019 10:50
Chemistry, 22.10.2019 10:50
Physics, 22.10.2019 10:50
History, 22.10.2019 10:50
English, 22.10.2019 10:50
Social Studies, 22.10.2019 10:50
History, 22.10.2019 10:50
World Languages, 22.10.2019 11:00
Social Studies, 22.10.2019 11:00