Which of the following amino acids are most frequently phosphorylated by protein kinases in the cytoplasm during signal transduction?

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#Question id: 4680

#Unit 3. Fundamental Processes

A protein is a transcriptional activator,  which binds to a site upstream of a promoter called PRE and stimulates transcription of the cI (repressor) gene. This activator protein is

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#Question id: 2077

#Unit 2. Cellular Organization

In receptor-mediated endocytosis, receptor molecules initially project to the outside of the cell. Where do they end up after endocytosis?

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#Question id: 11667

#Unit 7. System Physiology – Animal

Which of the following is characteristic of juxtamedullary nephrons?

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#Question id: 15738

#Unit 5. Developmental Biology

In humans and many other mammals, the sex chromosomes are called:

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#Question id: 12301

#Unit 7. System Physiology – Animal

Which of the following would likely lead to hyponatremia?