DNA is charged and _fragments travel faster than positively, shorter, longer negatively, shorter, longer negatively, longer, shorter positively, longer, shorter fragments within a gel during gel electrophoresis.

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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**Question:**

DNA is ___ charged and ___ fragments travel faster than ___ fragments within a gel during gel electrophoresis.

**Answer Choices:**

- ○ positively, shorter, longer
- ○ negatively, shorter, longer
- ○ negatively, longer, shorter
- ○ positively, longer, shorter

**Explanation:**

Gel electrophoresis is a technique used to separate DNA fragments based on their size and charge. DNA molecules are negatively charged due to their phosphate backbone, and when an electric field is applied, they migrate towards the positive electrode. Shorter fragments move through the gel matrix faster than longer fragments due to less resistance, allowing for size-based separation.
Transcribed Image Text:**Question:** DNA is ___ charged and ___ fragments travel faster than ___ fragments within a gel during gel electrophoresis. **Answer Choices:** - ○ positively, shorter, longer - ○ negatively, shorter, longer - ○ negatively, longer, shorter - ○ positively, longer, shorter **Explanation:** Gel electrophoresis is a technique used to separate DNA fragments based on their size and charge. DNA molecules are negatively charged due to their phosphate backbone, and when an electric field is applied, they migrate towards the positive electrode. Shorter fragments move through the gel matrix faster than longer fragments due to less resistance, allowing for size-based separation.
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