Gel Electrophoresis (VCE SSCE Biology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
Why do smaller DNA fragments travel further than larger ones during gel electrophoresis?
Why do smaller DNA fragments travel further than larger ones during gel electrophoresis?
Smaller fragments slip through pores easier
Why does DNA move toward the positive electrode during gel electrophoresis?
Why does DNA move toward the positive electrode during gel electrophoresis?
DNA has negative charge from phosphate
What material is the gel made from in gel electrophoresis?
What material is the gel made from in gel electrophoresis?
Agarose
Which fluorescent dye is used to visualize DNA bands under UV light?
Which fluorescent dye is used to visualize DNA bands under UV light?
Ethidium bromide
What does a band positioned closer to the wells indicate?
What does a band positioned closer to the wells indicate?
Larger DNA fragments
What is the primary purpose of a standard ladder in gel electrophoresis?
What is the primary purpose of a standard ladder in gel electrophoresis?
Provide reference for fragment sizes
What does a thicker, more intense band indicate?
What does a thicker, more intense band indicate?
Greater concentration of DNA
How does higher voltage affect DNA migration in gel electrophoresis?
How does higher voltage affect DNA migration in gel electrophoresis?
DNA migrates further
Why are STRs ideal for DNA profiling?
Why are STRs ideal for DNA profiling?
In non-coding regions, vary between people
How many bands appear for a heterozygous STR locus?
How many bands appear for a heterozygous STR locus?
Two bands