#Id: 3198

#Unit 3. Fundamental Processes

Errors in replication and damage to DNA have two consequences;
One is, of course, the introduction of permanent changes to the DNA (mutations), which can alter the coding sequence of a gene or its regulatory sequences.
The second consequence is that some chemical alterations to the DNA prevent its use as a template for replication and transcription

#Id: 6106

#Unit 3. Fundamental Processes

Thymine dimers cause mutations in two ways. (1) Dimers perturb the structure of DNA double helices and interfere with accurate DNA replication. (2) Errors occur during the cellular processes that repair defects in DNA, such as UV-induced thymine dimers To identify chemicals that are converted into mutagens in the liver, the Ames test treats potential indirect mutagens with a mixture of liver extract

#Id: 8040

#Unit 1. Molecules and their Interaction Relevant to Biology

#Id: 7580

#Unit 5. Developmental Biology

#Id: 7855

#Unit 1. Molecules and their Interaction Relevant to Biology

Optical rotation