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DNA Structure Mini Quiz

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Questions and Answers

What do the letters DNA stand for?

Deoxyribonucleic Acid

Who are the two scientists credited with discovering the structure of DNA?

James Watson and Francis Crick

What are the monomers of DNA called?

Nucleotides

What are the two molecules that form the backbone of DNA?

Phosphate molecules and deoxyribose sugar Signup and view all the answers

What are the four bases of DNA?

Adenine, Cytosine, Guanine and Thymidine Signup and view all the answers

How many rings do purines have?

Two Signup and view all the answers

How many rings do pyrimidines have?

One Signup and view all the answers

Which two bases are purine?

Adenine and Guanine Signup and view all the answers

Which two bases are pyrimidine?

Cytosine and Thymidine Signup and view all the answers

What are the complementary base pairs based on Chargaff's rule?

Cytosine and Guanine, and Thymidine and Adenine Signup and view all the answers

What bond pairs the bases along the axis of the DNA molecule?

Hydrogen Signup and view all the answers

What method did Wilkins and Franklin use to study the structure of DNA?

X-ray diffraction Signup and view all the answers

What shape did Watson and Crick determine the DNA molecule was?

Double helix Signup and view all the answers

Study Notes

DNA Fundamentals

DNA stands for Deoxyribonucleic Acid.
The structure of DNA was famously discovered by scientists James Watson and Francis Crick.

Molecular Composition

Nucleotides are the monomers that make up DNA.
The backbone of DNA consists of phosphate molecules and deoxyribose sugar.

Nitrogenous Bases

DNA contains four bases: Adenine, Cytosine, Guanine, and Thymidine.
Bases are categorized into purines and pyrimidines:
- Purines (two rings): Adenine and Guanine.
- Pyrimidines (one ring): Cytosine and Thymidine.

Base Pairing

Chargaff's rule establishes complementary base pairs: Cytosine pairs with Guanine, and Thymidine pairs with Adenine.
These base pairs are held together by hydrogen bonds.

Structural Insights

Wilkins and Franklin employed x-ray diffraction to explore DNA's structure, contributing significant insights.
Watson and Crick characterized DNA's shape as a double helix, crucial to understanding its function and replication.

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Description

Test your knowledge on the fundamental aspects of DNA with this mini quiz. Explore key terms such as the composition, structure, and famous scientists involved in its discovery. Perfect for biology students looking to reinforce their learning about DNA.