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
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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![**DNA Replication: Identifying Leading and Lagging Strands**
In this educational diagram, we are examining a DNA replication fork. Two parental DNA strands are illustrated, which serve as templates for the synthesis of new strands. The diagram is labeled with:
- **W, X, Y, Z:** These are placeholders for the new strands being synthesized.
- **3' and 5':** These numbers indicate the directionality of the DNA strands.
**Detailed Explanation of Components:**
- **W and X:** Represent the new strands synthesized along the template. One of these will be the leading strand and the other the lagging strand.
- **Y and Z:** Also represent new strands. Similarly, one will be leading and the other lagging.
**Strand Roles in Replication:**
- **Leading Strand (A):** This strand is synthesized continuously in the 5' to 3' direction, following the replication fork as it opens.
- **Lagging Strand (B):** This strand is synthesized discontinuously in short segments called Okazaki fragments, and also in the 5' to 3' direction, but moving away from the replication fork.
**Task:**
- Match each of the strands labeled W, X, Y, and Z to their role in replication, as either leading or lagging.
Understanding which strands function as leading or lagging is essential for grasping how DNA replication ensures accurate genetic information transfer.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2cf018a9-6ec0-410f-914e-5085517cf34e%2Ffca20cd3-a7d1-4a05-862c-54bd5d8498f5%2Fragpb1_processed.png&w=3840&q=75)
Transcribed Image Text:**DNA Replication: Identifying Leading and Lagging Strands**
In this educational diagram, we are examining a DNA replication fork. Two parental DNA strands are illustrated, which serve as templates for the synthesis of new strands. The diagram is labeled with:
- **W, X, Y, Z:** These are placeholders for the new strands being synthesized.
- **3' and 5':** These numbers indicate the directionality of the DNA strands.
**Detailed Explanation of Components:**
- **W and X:** Represent the new strands synthesized along the template. One of these will be the leading strand and the other the lagging strand.
- **Y and Z:** Also represent new strands. Similarly, one will be leading and the other lagging.
**Strand Roles in Replication:**
- **Leading Strand (A):** This strand is synthesized continuously in the 5' to 3' direction, following the replication fork as it opens.
- **Lagging Strand (B):** This strand is synthesized discontinuously in short segments called Okazaki fragments, and also in the 5' to 3' direction, but moving away from the replication fork.
**Task:**
- Match each of the strands labeled W, X, Y, and Z to their role in replication, as either leading or lagging.
Understanding which strands function as leading or lagging is essential for grasping how DNA replication ensures accurate genetic information transfer.
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