TESTING THE HYPOTHESIS FIGURE I0.11 DNe I ctschromatin o repeatina unts contaning 30 bpof DNA. Starting mater ial: Nuclei from rat liver ells. Experimental levd Canaptud levd 1. Incubute the nuclei with low, medium, and high concentrations of DNase I. The conceptual level illustrates a low DNase I conentration. DNase I Before digestion (beads on Low Medium High a string) 37°C 37°C 37°C A fter digestion (DNA is cut in inker region) Treat with delergent; add phenol. 2 lolale the DNA. This involves dicsolving the nuck ar membrane with delergent and treating the sample with the organic solvent phenol. Аquеоия phase (contains DNA) DNA in Phenol phae (contains membranes and snoonbe phase prokeima) Marker Low Medium High Low 3. Load the DNA into a well of an agaruse gel and run the gel to separale the DNA pieces according to sie. On this el, also load DNA fragments of known molecular mas (marker lane). సి గా Gel (top view) Stain el. 4. Visualze the DNA fragments by staining the DNA with ethidum bromide, a dye that binds to DNA and is fluorescent when exciled by UV light Solution Gel with ethidium bromide View gel UV light Photograph gel.

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In Noll’s experiment , explain where DNase I cuts the DNA. Why were the bands on the gel in multiples of 200 bp at lower DNase I concentrations?

TESTING THE HYPOTHESIS
FIGURE I0.11 DNe I ctschromatin o repeatina unts contaning 30 bpof DNA.
Starting mater ial: Nuclei from rat liver ells.
Experimental levd
Canaptud levd
1. Incubute the nuclei with low, medium,
and high concentrations of DNase I.
The conceptual level illustrates a low
DNase I conentration.
DNase I
Before digestion
(beads on
Low
Medium
High
a string)
37°C
37°C
37°C
A fter digestion
(DNA is cut in
inker region)
Treat with delergent; add phenol.
2 lolale the DNA. This involves
dicsolving the nuck ar membrane with
delergent and treating the sample with
the organic solvent phenol.
Аquеоия
phase
(contains
DNA)
DNA in
Phenol
phae (contains
membranes and
snoonbe
phase
prokeima)
Marker Low
Medium High
Low
3. Load the DNA into a well of an agaruse
gel and run the gel to separale the DNA
pieces according to sie. On this el,
also load DNA fragments of known
molecular mas (marker lane).
సి గా
Gel (top view)
Stain el.
4. Visualze the DNA fragments by
staining the DNA with ethidum
bromide, a dye that binds to DNA and
is fluorescent when exciled by UV light
Solution
Gel
with
ethidium
bromide
View gel
UV light
Photograph gel.
Transcribed Image Text:TESTING THE HYPOTHESIS FIGURE I0.11 DNe I ctschromatin o repeatina unts contaning 30 bpof DNA. Starting mater ial: Nuclei from rat liver ells. Experimental levd Canaptud levd 1. Incubute the nuclei with low, medium, and high concentrations of DNase I. The conceptual level illustrates a low DNase I conentration. DNase I Before digestion (beads on Low Medium High a string) 37°C 37°C 37°C A fter digestion (DNA is cut in inker region) Treat with delergent; add phenol. 2 lolale the DNA. This involves dicsolving the nuck ar membrane with delergent and treating the sample with the organic solvent phenol. Аquеоия phase (contains DNA) DNA in Phenol phae (contains membranes and snoonbe phase prokeima) Marker Low Medium High Low 3. Load the DNA into a well of an agaruse gel and run the gel to separale the DNA pieces according to sie. On this el, also load DNA fragments of known molecular mas (marker lane). సి గా Gel (top view) Stain el. 4. Visualze the DNA fragments by staining the DNA with ethidum bromide, a dye that binds to DNA and is fluorescent when exciled by UV light Solution Gel with ethidium bromide View gel UV light Photograph gel.
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