Podcast
Questions and Answers
What refers to the amount of twist in a particular DNA strand?
What refers to the amount of twist in a particular DNA strand?
- DNA replication
- DNA compaction
- DNA transcription
- DNA supercoiling (correct)
What shape is formed when a DNA segment under twist strain is closed into a circle and allowed to move freely?
What shape is formed when a DNA segment under twist strain is closed into a circle and allowed to move freely?
- Figure-eight (correct)
- Spiral
- Zigzag
- Loop
Which enzyme changes the amount of DNA supercoiling to facilitate functions such as DNA replication and transcription?
Which enzyme changes the amount of DNA supercoiling to facilitate functions such as DNA replication and transcription?
- Primase
- Helicase
- Topoisomerase (correct)
- Ligase
What is the shape referred to as when describing DNA topology?
What is the shape referred to as when describing DNA topology?
When does DNA become temporarily positively supercoiled?
When does DNA become temporarily positively supercoiled?
Study Notes
DNA Structure and Topology
- The amount of twist in a particular DNA strand is referred to as DNA supercoiling.
- When a DNA segment under twist strain is closed into a circle and allowed to move freely, it forms a plectoneme shape.
- The enzyme that changes the amount of DNA supercoiling to facilitate functions such as DNA replication and transcription is topoisomerase.
- The shape referred to when describing DNA topology is torsion.
- DNA becomes temporarily positively supercoiled during DNA replication.
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Description
Test your knowledge of DNA supercoiling with this quiz! Explore the concepts of positive and negative supercoiling and how they impact biological processes. Learn about the role of supercoiling in compacting DNA and regulating access to the genetic code.
