For Each Historical Identification Question, Define the Term and Briefly

question 103

Short Answer

For each historical identification question, define the term and briefly describe its historical significance.
-Holy Roman Empire

---

Definitions:

Lac Operon

A regulatory mechanism in bacteria that controls the expression of enzymes involved in lactose metabolism.

Repressor

A protein that binds to specific DNA sequences, preventing the transcription of genetic information from DNA to mRNA.

Acetyl Groups

Organic functional groups consisting of a methyl group single-bonded to a carbonyl. The formula is CH3CO-, significant in metabolic processes.

Histones

Proteins that package and order the DNA into structural units called nucleosomes, playing a critical role in gene regulation.