At 2:00 pm, you measured intracellular arginine at 100M. After addition of 200M of arginine to the cell, you, at 2:45 pm, measured intracellular arginine levels to be still at 100M. The most likely explanation is: Arginine bound to the active site of the repressor protein Arginine bound to the allosteric site of RNA polymerase Arginine was in excess in the cell and acted as an inducer Arginine was in excess in the cell and bound to the operator Arginine bound to the allosteric site of the repressor protein
Proteins
We generally tend to think of proteins only from a dietary lens, as a component of what we eat. However, they are among the most important and abundant organic macromolecules in the human body, with diverse structures and functions. Every cell contains thousands and thousands of proteins, each with specific functions. Some help in the formation of cellular membrane or walls, some help the cell to move, others act as messages or signals and flow seamlessly from one cell to another, carrying information.
Protein Expression
The method by which living organisms synthesize proteins and further modify and regulate them is called protein expression. Protein expression plays a significant role in several types of research and is highly utilized in molecular biology, biochemistry, and protein research laboratories.
At 2:00 pm, you measured intracellular arginine at 100M. After addition of 200M of arginine to the cell, you, at 2:45 pm, measured intracellular arginine levels to be still at 100M. The most likely explanation is:
- Arginine bound to the active site of the repressor protein
- Arginine bound to the allosteric site of RNA polymerase
- Arginine was in excess in the cell and acted as an inducer
- Arginine was in excess in the cell and bound to the operator
- Arginine bound to the allosteric site of the repressor protein
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