

DNA Structure and Measurement Techniques
Interactive Video
•
Biology, Science, Chemistry
•
10th - 12th Grade
•
Practice Problem
•
Hard
Patricia Brown
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is autoradiography primarily used for?
Visualizing radioactive decay patterns
Identifying chemical compounds
Measuring the length of proteins
Determining the age of fossils
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the role of tritium in Karen's technique?
It stabilizes the DNA structure
It is a nutrient for cell growth
It is used to radioactively mark DNA
It acts as a catalyst
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
During the second step of Karen's technique, what happens to the cells?
They are frozen
They are placed in a centrifuge
Their walls are digested to release DNA
They are stained with a dye
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of applying a photographic emulsion in the third step?
To dissolve the cell membrane
To color the DNA
To capture the decay of tritium
To magnify the DNA
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the significance of using a dialysis membrane in the technique?
To enhance radioactive decay
To burst cells and release DNA
To support the cells during digestion
To filter out impurities
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is observed under the microscope after developing the film?
Clear images of cell organelles
Bright spots indicating protein synthesis
Dark grains indicating DNA positions
Colorful patterns showing cell activity
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What was the measured length of E. coli's DNA using Karen's technique?
12,000 micrometers
2 micrometers
500 micrometers
1,100 micrometers
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