#Question id: 1384
#Unit 4. Cell Communication and Cell Signaling
Mutations that block expression of the E-cadherin gene are thought to be an important step in metastasis. To better understand how loss of E-cadherin contributes to metastasis, scientists created two cell lines that differed in their expression of E-cadherin. One cell line expressed normal E-cadherin, but at 10% of the usual levels. The other cell line expressed normal E-cadherin at the usual levels, and also, at high levels a mutant form that included the cytoplasmic domain but lacked the rest of the protein. Both cell lines exhibited strongly reduced cell adhesion in culture. However, only the cell line with reduced expression of normal E-cadherin metastasized when introduced into mice.
Which of the following hypotheses is most consistent with the observations on cell adhesion and metastasis in these cell lines?
#Question id: 5818
#Unit 8. Inheritance Biology
How does recombinational repair differ from nucleotide excision repair (NER)?
#Question id: 344
#Unit 1. Molecules and their Interaction Relevant to Biology
The partial negative charge at one end of a water molecule is attracted to the partial positive charge of another water molecule. What is this attraction called?
#Question id: 777
#Unit 1. Molecules and their Interaction Relevant to Biology
The first miRNA identified in C.elegans was named__________
#Question id: 10309
#Unit 6. System Physiology – Plant
Which of the following carbon compound also called the oxoglutarate?