Questions and Answers
What does Chargaff's rule state?
Chargaff's rule states that the DNA of any species contains equal amounts of Adenine and Thymine and also equal amounts of Cytosine and Guanine.
Based on this information, scientists could predict that the base ________ pairs with ________ and the base ________ pairs with _______.
Adenine pairs with Thymine and Cytosine pairs with Guanine
What do the letters of DNA stand for?
Deoxyribonucleic acid
Who are at least three scientists that contributed to the discovery of the DNA structure?
Signup and view all the answers
What are the monomers called in DNA?
Signup and view all the answers
What are the two components that make up the backbone of the DNA molecule?
Signup and view all the answers
What are the four different variations of the monomers in DNA?
Signup and view all the answers
What are the two different types of bases in DNA?
Signup and view all the answers
What are the two bases that are Purines?
Signup and view all the answers
What are the two bases that are Pyrimidines?
Signup and view all the answers
These bases are called _____ which means the bases of one strand of DNA are ______ to the bases of the other strand of DNA.
Signup and view all the answers
The base pairs are paired by the _____ bonds along the axis of the molecule. Adenine and Thymine are connected by ___ hydrogen bonds and Guanine and Cytosine are connected by ___ hydrogen bonds.
Signup and view all the answers
Franklin and Wilkins studied the structure of DNA using _______ ________, a technique used to examine molecules, and helped Watson and Crick determine that the shape of DNA was a _____.
Signup and view all the answers
What is the basic structure of a nucleotide?
Signup and view all the answers
Complementary Sequence to the following DNA strand. A=___ C=____
Signup and view all the answers
Study Notes
Chargaff's Rule
- States that DNA from any species contains equal amounts of Adenine and Thymine, and equal amounts of Cytosine and Guanine.
Base Pairing
- Adenine pairs with Thymine.
- Cytosine pairs with Guanine.
DNA Definition
- Stands for Deoxyribonucleic Acid.
Key Scientists
- James Watson, Francis Crick, Rosalind Franklin, and Erwin Chargaff contributed to the discovery of DNA's structure.
DNA Structure
- DNA is a polymer made up of monomers called nucleotides.
DNA Backbone Components
- Composed of a Phosphate Group and Deoxyribose Sugars.
Nucleotide Variations
- Four types: Adenine, Cytosine, Guanine, and Thymine.
Types of Bases
- Purines: Adenine and Guanine (two smaller rings).
- Pyrimidines: Cytosine and Thymine (one larger ring).
Complementary Base Pairs
- Bases from one strand are complementary to bases from the other strand.
Hydrogen Bonding
- Base pairs are held together by hydrogen bonds.
- Adenine and Thymine are connected by 2 hydrogen bonds; Guanine and Cytosine are connected by 3 hydrogen bonds.
DNA Structure Technique
- Franklin and Wilkins used X-ray crystallography to study DNA, leading to the discovery of its double helix shape.
Nucleotide Structure
- A nucleotide consists of three parts: Phosphate Group, Deoxyribose sugar (5 carbon ring), and a Nitrogen-Containing Base (A, G, C, or T).
Complementary Bases
- A pairs with T, C pairs with G.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Test your knowledge on the structure of DNA with these flashcards. Review key concepts such as Chargaff's rule and base pairing. Perfect for students preparing for genetics exams.
