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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Question
Question c is needed
Transcribed Image Text:which were then subjected to density gradient centrifugation.
3
The table below summarises the three stages of Meselson and Stahl's experiment and
their results.
(a) Complete the table by drawing, in the appropriate boxes, diagrams of the DNA
molecules and mark the position and size of the DNA bands in the tubes.
Dlagram to show the
strands In the DNA
molecules of the bacteria separating solution
Experimental stage
Positlon and size of DNA
bands In the tube of
Stage 1
Bacteria grown for several
generations in culture
medium containing heavy
nitrogen
TA2G - Completed forms must be available for Open Awards external moderation purposes. Page 9 of 15
Stage 2
The bacteria from the end
of stage 1 were grown for
another generation in
culture medium containing
light nitrogen
Stage 3
The bacteria from the end
of stage 2 were grown for
one more generation in
culture medium containing
light nitrogen
(b) The bacteria at the end of stage two were grown for five more generations. After
each generation, what would you expect to see in the test tube? Draw these in the
test tubes below. (sent separately)
Gen
Gen 2
Gen 3
Gen
ngdom)
MacBook Pro
Transcribed Image Text:Stage 3
The bacteria from the end
of stage 2 were grown for
one more generation in
culture medium containing
light nitrogen
(b) The bacteria at the end of stage two were grown for five more generations. After
each generation, what would you expect to see in the test tube? Draw these in the
test tubes below. (sent separately)
Gen. 0
Gen. 1
Gen. 2
Gen.3
Gen.4
(c) Which part of the DNA molecule would be expected to incorporate the nitrogen?
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