Gel Electrophoresis Quiz: Test Your Knowledge

Podcast

Play an AI-generated podcast conversation about this lesson

Download our mobile app to listen on the go

Get App

Questions and Answers

What is the purpose of gel electrophoresis in DNA testing?

To extract DNA from cells
To identify specific nucleotide patterns in DNA
To amplify DNA samples
To separate DNA fragments based on their size (correct)

What is the function of a restriction enzyme in DNA testing?

To cut DNA at specific nucleotide patterns (correct)
To amplify DNA samples
To visualize DNA bands on a gel
To separate DNA fragments based on their size

What is the purpose of polymerase chain reaction (PCR) in DNA testing?

To make many copies of a DNA sample (correct)
To visualize DNA bands on a gel
To separate DNA fragments based on their size
To identify specific nucleotide patterns in DNA

What property of DNA fragments causes small fragments to move through the gel faster than large ones in gel electrophoresis?

Size (C) Signup and view all the answers

What happens to small DNA fragments when they are run through the gel?

They move faster through the gel (A) Signup and view all the answers

What is the purpose of loading DNA samples into wells at one end of a gel?

To prepare the DNA for running through the gel (C) Signup and view all the answers

What happens when electricity is run through the DNA gel in the testing process?

DNA fragments move towards the positive electrode (D) Signup and view all the answers

Why is it necessary to make many copies of a DNA sample in the PCR process?

To have enough DNA for analysis (C) Signup and view all the answers

What does the presence of DNA bands in the gel indicate?

Groups of same-sized DNA fragments (C) Signup and view all the answers

What is the function of a DNA-binding dye in the gel staining process?

To visualize DNA bands in the gel (B) Signup and view all the answers

What is the main principle behind gel electrophoresis?

Separating DNA fragments by size (B) Signup and view all the answers

How are DNA fragments loaded onto the gel in gel electrophoresis?

One side of the gel (A) Signup and view all the answers

What is the purpose of running electricity through the gel in gel electrophoresis?

To separate DNA fragments (B) Signup and view all the answers

Which DNA fragments move faster through the gel in gel electrophoresis?

Smaller DNA fragments (A) Signup and view all the answers

What are the practical applications of gel electrophoresis?

Solving crimes and paternity tests (C) Signup and view all the answers

In crime scene DNA analysis, what samples can be compared to identify suspects?

Victim, suspect, and control samples (D) Signup and view all the answers

What do paternity tests compare to determine biological relationships?

Child's DNA with suspected father and mother samples (B) Signup and view all the answers

Apart from crime solving and paternity tests, what else can gel electrophoresis be used for?

Studying evolutionary relationships (D) Signup and view all the answers

How can gel electrophoresis results help in studying genetic relationships?

Show closeness of genetic relationships (C) Signup and view all the answers

What is the significance of gel electrophoresis in DNA analysis?

It is a key technique in DNA analysis (C) Signup and view all the answers

Flashcards

Gel electrophoresis purpose

Separates DNA fragments based on their size.

Restriction enzyme function

Cuts DNA at specific nucleotide patterns.