#Question id: 3893
#Unit 3. Fundamental Processes
Protein structural motifs often have general functions in common. Which one of the following motifs is known to be involved in protein dimer formation, but not in direct protein-DNA interactions?
#Question id: 3895
#Unit 3. Fundamental Processes
Which one of the following types of eukaryotic regulatory proteins interact with enhancers?
#Question id: 3896
#Unit 3. Fundamental Processes
Which one of the following is not involved in steroid hormone action?
#Question id: 3898
#Unit 3. Fundamental Processes
Which one of the following classes is expressed in the unfertilized egg and is involved in directing the spatial organization of the Drosophila embryo early in development?
#Question id: 26476
#Unit 3. Fundamental Processes
| Column 1 | Column 2 |
| 1. Repressors bind to specific sites on the DNA. In bacterial cells, such binding sites, called | a. effector |
| 2. Regulation by means of a repressor protein that blocks transcription is referred to as | b. positive regulation |
| 3. Activators bind to DNA and enhance the activity of RNA polymerase at a promoter; this is | c. negative regulation |
| 4. Repressor binding to DNA is regulated by a molecular signal called | d. operators |
#Question id: 26475
#Unit 3. Fundamental Processes
If the nonsense mutation in one gene of a transcription unit it leads to the premature termination of transcription the phenomenon known as