Pyrimidine Nucleotide Deoxyribose Purine Phosphate Hydrogen bond 14 1 biogamer.com

Human Anatomy & Physiology (11th Edition)
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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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What goes to what?
The image is a diagram depicting the structure of a DNA molecule. It primarily illustrates the double helix formation with its components clearly labeled. Here's a detailed explanation of each section of the diagram:

1. **Components:**
   - **Hydrogen bond**: Shown as parallel lines between the bases on the two strands, indicating where the two strands are held together.
   - **Phosphate**: Represented by circles connected in a chain along the backbone of the DNA.
   - **Deoxyribose**: Shown as pentagons connected to the phosphate groups, forming the sugar-phosphate backbone of the DNA.
   - **Purine**: Labeled on one side of the hydrogen bonds, typically represented as a larger rectangular block.
   - **Pyrimidine**: Labeled on the opposite side of the hydrogen bonds, shown as a smaller rectangular block.
   - **Nucleotide**: Represents the combination of a deoxyribose, a phosphate group, and a nitrogenous base (either purine or pyrimidine).

2. **Structure:**
   - The DNA is shown as two antiparallel strands that twist to form the iconic double helix shape. Each strand has a backbone composed of alternating phosphate and deoxyribose sugar molecules.
   - The nitrogenous bases extend from each sugar and form base pairs connected by hydrogen bonds in the center of the helix.

3. **Base Pairing:**
   - The base pairing follows the rules of complementary base pairing, where purines (adenine and guanine) pair with pyrimidines (thymine and cytosine, respectively). This is represented by the parallel lines (hydrogen bonds) between the pairs.

This diagram helps illustrate the fundamental aspects of DNA's structure and its components, ideal for educating students on molecular biology concepts.
Transcribed Image Text:The image is a diagram depicting the structure of a DNA molecule. It primarily illustrates the double helix formation with its components clearly labeled. Here's a detailed explanation of each section of the diagram: 1. **Components:** - **Hydrogen bond**: Shown as parallel lines between the bases on the two strands, indicating where the two strands are held together. - **Phosphate**: Represented by circles connected in a chain along the backbone of the DNA. - **Deoxyribose**: Shown as pentagons connected to the phosphate groups, forming the sugar-phosphate backbone of the DNA. - **Purine**: Labeled on one side of the hydrogen bonds, typically represented as a larger rectangular block. - **Pyrimidine**: Labeled on the opposite side of the hydrogen bonds, shown as a smaller rectangular block. - **Nucleotide**: Represents the combination of a deoxyribose, a phosphate group, and a nitrogenous base (either purine or pyrimidine). 2. **Structure:** - The DNA is shown as two antiparallel strands that twist to form the iconic double helix shape. Each strand has a backbone composed of alternating phosphate and deoxyribose sugar molecules. - The nitrogenous bases extend from each sugar and form base pairs connected by hydrogen bonds in the center of the helix. 3. **Base Pairing:** - The base pairing follows the rules of complementary base pairing, where purines (adenine and guanine) pair with pyrimidines (thymine and cytosine, respectively). This is represented by the parallel lines (hydrogen bonds) between the pairs. This diagram helps illustrate the fundamental aspects of DNA's structure and its components, ideal for educating students on molecular biology concepts.
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