
DNA Structure and X-ray Diffraction
Interactive Video
•
Physics, Biology, Science
•
9th - 10th 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
Who was the scientist that first determined the DNA molecule was a double helix?
Francis Crick
James Watson
Rosalind Franklin
Maurice Wilkins
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What technique did Rosalind Franklin use to image DNA?
Ultrasound Imaging
Nuclear Magnetic Resonance
X-ray Diffraction
Electron Microscopy
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why are X-rays used instead of visible light to image small objects like DNA?
X-rays have a shorter wavelength
X-rays have a longer wavelength
X-rays are cheaper
X-rays are safer to use
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the visible light experiment, what object is used to demonstrate the diffraction pattern?
A DNA model
A salt crystal
A helical spring
A graphite rod
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What pattern is observed when a laser is shone through a helical spring?
A square pattern
A circular pattern
An X pattern
A triangular pattern
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is the bright center dot blocked in the diffraction experiment?
To prevent overexposure
To enhance the X pattern
To focus the laser
To increase the wavelength
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does a helix appear when viewed straight on?
Like a circle
Like a square
Like a sine wave
Like a straight line
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