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- 1. Multiple Choice
What is the term for the technique performed by using gel electrophoresis to identify an individual using a DNA sample?
cloning
gene therapy
transformation
DNA fingerprinting
- 2. Multiple Choice
Dogs are closely related to wolves. To support this statement, what type of testing or experiment would a scientist most likely carry out?
compare wolf and dog DNA
examine their social habits and record similarities
feed them similar foods and see if they have similar diets
determine whether a female dog will care for a wolf pup
- 3. Multiple Choice
The illustration below shows the results of gel electrophoresis of 4 different deer species. Which two species of deer are more closely related?
1 and 3
1 and 4
2 and 3
2 and 4
- 4. Multiple Choice
What is the primary purpose of using restriction enzymes prior to gel electrophoresis?
It allows the scientist to start with a very small sample of DNA.
It allows the strands of DNA to be cut into various lengths for testing.
It allows the DNA to be visible on the gel.
It allows the DNA strands to be charged so the electrical current can send the strands through the gel.
- 5. Multiple Choice
What is the purpose of gel electrophoresis?
to make extra copies of chromosomes
to cut DNA into fragments
to inject DNA into cells
to separate DNA fragments by size
- 6. Multiple Choice
Why do the fragments of DNA in gel electrophoresis travel away from the negative electrode?
The DNA is positively charged.
The DNA is negatively charged.
The agarose gel is positively charged.
The agarose gel is negatively charged.
- 7. Multiple Choice
A sample of DNA was taken from a crime scene and four different suspects. The gel electrophoresis below shows their profiles. Which suspect was most likely at the scene of the crime?
Suspect 1
Suspect 2
Suspect 3
Suspect 4
- 8. Multiple Choice
Which specific characteristic of DNA allows geneticists to identify people using DNA fingerprinting?
The shape of the DNA molecule is unique to every person.
The size of each chromosome is unique to every person.
The number of chromosomes is unique to every person.
The nucleotide sequence is unique to every person.
- 9. Multiple Choice
When running different size fragments of DNA through a gel during electrophoresis, which is true about the sizes of the fragments of DNA?
Longer fragments of DNA will run slower than shorter fragments of DNA.
Shorter fragments of DNA will run slower than longer fragments of DNA.
Fragments must be cut into the same size so that all fragments can be run at the same speed.
Longer and shorter fragments will run at the same speed.
- 10. Multiple Choice
Gel electrophoresis can be used to analyze DNA. Which best represents a use of this process?
to determine if the cell has made a mistake during translation
to identify the sequence of DNA nitrogenous bases in a sample
to compare DNA from two different individuals
to provide the number of chromosomes present in an individual
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