Questions and Answers
What are the three parts of the nucleotide?
Sugar, phosphate, base
What kind of sugar is found in a nucleotide?
Deoxyribose
Which nucleotide component contains nitrogen?
Bases
Name the four nitrogen bases.
Signup and view all the answers
What makes up the rungs of the 'ladder' in DNA?
Signup and view all the answers
What makes up the backbone of the 'ladder' in DNA?
Signup and view all the answers
What type of biological molecule is a DNA helicase?
Signup and view all the answers
What is the role of the DNA helicase in the replication of DNA?
Signup and view all the answers
What rule is used to join the free nucleotides to the exposed bases of the DNA?
Signup and view all the answers
Why is DNA replication called semi-conservative?
Signup and view all the answers
What holds the two strands of DNA together?
Signup and view all the answers
What is the structure of DNA?
Signup and view all the answers
Describe the replication of DNA.
Signup and view all the answers
Study Notes
DNA Structure
- Nucleotides consist of three components: sugar, phosphate, and base.
- Deoxyribose is the specific type of sugar found in nucleotides.
- Nitrogen-containing components of nucleotides are the bases: Guanine, Adenine, Thymine, and Cytosine.
- The structure of DNA resembles a ladder, with nitrogen bases forming the rungs.
- The sugar and phosphate components create the backbone of the ladder.
DNA Replication
- DNA helicase is an enzyme that plays a critical role in DNA replication by unzipping the DNA molecule.
- The process of complementary base pairing ensures accurate joining of free nucleotides to exposed bases during replication.
- Replication is termed semi-conservative because each new DNA molecule contains one original strand and one new strand.
Molecular Interactions
- Hydrogen bonds between nitrogen bases connect the two strands of DNA, holding them together.
- The double helix formation consists of intertwined strands of DNA, contributing to its stability and structure.
Replication Process
- During replication, hydrogen bonds between nucleotides break, causing the strands to separate.
- Free nucleotides are drawn to exposed bases on the newly separated strands of DNA.
- New hydrogen bonds form between the nucleotides, completing the duplication of the DNA strand.
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 and its replication process with these flashcards. Each card covers essential components such as nucleotides, sugars, and nitrogen bases. Perfect for students looking to reinforce their understanding of molecular biology concepts.
