Examlex
Which of the following is a pure substance?
Cell Types
Distinct forms that cells take on within an organism, characterized by their specific structure, function, and biochemical properties.
Unique Functions
Distinctive roles or activities performed by particular biological entities or structures not shared with others.
Catabolite Activator Protein
A protein that binds to DNA and stimulates the transcription of certain genes in bacteria, especially in the presence of specific sugars.
Promoter Region
The promoter region is a sequence of DNA that initiates transcription of a particular gene, essential for gene expression regulation.
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