In the experiment performed by Messelson and Stahl, bacterial cells grown in 15N-containing growth medium for many generations were then allowed to grow in 14N-containing medium. Suppose they would have conducted the experiment the other way around: that is, to first grow bacterial cells in 14N-containing medium for many generations and then switching them to a 15N-containing growth medium. After two generations of growth in 15N media the results of a CsCl density gradient centrifugation of the DNA would be expected to show one band of intermediate-density and one band of low-density (i.e. light band) one band of low density (i.e. light band), one band of intermediate density, and one band of high density (i.e. heavy band). one band of intermediate density and one band of high-density (i.e. heavy band) one band on intermediate density one band of low density (i.e. light band) and one band of high density (i.e. heavy band).
In the experiment performed by Messelson and Stahl, bacterial cells grown in 15N-containing growth medium for many generations were then allowed to grow in 14N-containing medium. Suppose they would have conducted the experiment the other way around: that is, to first grow bacterial cells in 14N-containing medium for many generations and then switching them to a 15N-containing growth medium. After two generations of growth in 15N media the results of a CsCl density gradient centrifugation of the DNA would be expected to show one band of intermediate-density and one band of low-density (i.e. light band) one band of low density (i.e. light band), one band of intermediate density, and one band of high density (i.e. heavy band). one band of intermediate density and one band of high-density (i.e. heavy band) one band on intermediate density one band of low density (i.e. light band) and one band of high density (i.e. heavy band).
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Transcribed Image Text:In the experiment performed by Messelson and Stahl, bacterial cells grown in 15N-containing growth medium for many generations were then
allowed to grow in 14N-containing medium. Suppose they would have conducted the experiment the other way around: that is, to first grow bacterial
cells in 14N-containing medium for many generations and then switching them to a 15N-containing growth medium. After two generations of growth
in 15N media the results of a CsCl density gradient centrifugation of the DNA would be expected to show
one band of intermediate-density and one band of low-density (i.e. light band)
one band of low density (i.e. light band), one band of intermediate density, and one band of high density (i.e. heavy band).
one band of intermediate density and one band of high-density (i.e. heavy band)
one band on intermediate density
one band of low density (i.e. light band) and one band of high density (i.e. heavy band).
O O
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