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Gel Electrophoresis Quizzes, Questions & Answers

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Top Trending Gel Electrophoresis Quizzes

Electrical Pull: The DNA Electrophoresis Principle

DNA does not move through a gel by chance. It moves because every phosphate group in its backbone carries a negative charge, and an electric field sends it migrating toward the positive electrode with a force proportional to the...

Questions: 20 | Attempts: 17 | Last updated: Mar 8, 2026

Sample Question
What is the net electrical charge of a DNA molecule?

Negative

Positive

Neutral

Changing

Magnetic

Matching the Pattern: DNA Fingerprinting Explained

No two people, except identical twins, have the same pattern of short tandem repeats scattered across their genome, and that individuality is the foundation of one of forensic science's most powerful tools. DNA fingerprinting...

Questions: 20 | Attempts: 12 | Last updated: Mar 8, 2026

Sample Question
What is the biological basis for using DNA fingerprinting to distinguish between individuals?

The presence of highly variable non-coding regions in the genome

Every person has a unique set of proteins

The number of chromosomes varies between humans

DNA is a different color for every person

Only criminals have specific "marker" genes

Glowing Results: Visualizing DNA Gel

After electrophoresis separates the DNA, the next challenge is making the invisible visible. Visualizing DNA gel explained covers how intercalating dyes like ethidium bromide and safer modern alternatives bind to DNA and...

Questions: 20 | Attempts: 11 | Last updated: Mar 8, 2026

Sample Question
Why is a chemical stain necessary for visualizing dna gel results after electrophoresis?

DNA is naturally colorless and invisible to the naked eye

DNA is too small to stay in the gel without dye

The dye provides the electric charge for the DNA

The dye acts as a weight to sink the DNA

DNA only moves if it is colored

The Sieve: Agarose Gel Electrophoresis Explained

To separate DNA fragments by size, you need a molecular obstacle course, and agarose gel provides exactly that. Agarose gel electrophoresis explained covers how the polysaccharide agarose forms a porous matrix when set, creating...

Questions: 20 | Attempts: 11 | Last updated: Mar 8, 2026

Sample Question
What is the primary biological source of the agarose used to make the gel matrix?

Red seaweed (algae)

Tree bark

Mushroom spores

Bacteria cell walls

Animal bones

Recent Gel Electrophoresis Quizzes

The Molecular Ruler: DNA Ladder Explained

A band on a gel tells you where your DNA ended up, but without a reference it tells you nothing about how big it is. DNA ladder explained covers how commercially prepared mixtures of DNA fragments of known sizes serve as...

Questions: 20 | Attempts: 10 | Last updated: Mar 8, 2026

Sample Question
What is the primary purpose of using a DNA ladder in gel electrophoresis?

To act as a molecular ruler for estimating fragment size

To provide energy for the DNA movement

To change the charge of the unknown DNA

To prevent the gel from melting

To dye the DNA purple