Ask the Chatbot Games & Quizzes History & Society Science & Tech Biographies Animals & Nature Geography & Travel Arts & Culture ProCon Money Videos
semiconservative DNA replication
References
Images
Diagram illustrating semiconservative DNA replication, showing a double helix unwinding into two template strands. New nucleotides are added by DNA polymerase to form leading and lagging strands, with Okazaki fragments joined by DNA ligase. Helicase, single-strand binding proteins, and the replication fork are labeled.
Britannica AI Icon

semiconservative DNA replication

genetics
Written by
The Information Architects of Encyclopaedia Britannica

The Information Architects maintain a master list of the topics included in the corpus of  Encyclopædia Britannica, and create and manage the relationships between them.
The Information Architects of Encyclopaedia Britannica
Last updated

Quick Summary

Diagram illustrating semiconservative DNA replication, showing a double helix unwinding into two template strands. New nucleotides are added by DNA polymerase to form leading and lagging strands, with Okazaki fragments joined by DNA ligase. Helicase, single-strand binding proteins, and the replication fork are labeled.
semiconservative DNA replication In semiconservative DNA replication an existing DNA molecule is separated into two template strands. New nucleotides align with and bind to the nucleotides of the existing strands, thus forming two DNA molecules that are identical to the original DNA molecule.

Semiconservative DNA replication is a fundamental process in genetics where a double-stranded DNA molecule separates into two single strands. Each of these strands then serves as a template for the creation of a new, complementary strand. This results in two identical DNA molecules, each composed of one original strand and one newly synthesized strand.12

This process is crucial for maintaining genetic integrity and is carried out by specialized enzymes, primarily DNA polymerases. These enzymes add nucleotides to a growing DNA chain, ensuring that the new strands are exact copies of the original, with bases pairing specifically (adenine with thymine, and guanine with cytosine). Replication begins at a specific origin point and proceeds in both directions along the DNA molecule.3452

Summary created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.
5 Britannica Sources
  1. DNA polymerase
  2. semiconservative
  3. metabolism - Synthesis of DNA
  4. nucleic acid - Enzymes of replication
  5. nucleic acid - Basic mechanisms

Ask Britannica AI about this topic

Britannica doesn't have a full article on this topic, so we've curated a list of our relevant coverage.