#Question id: 28889
#Unit 4. Cell Communication and Cell Signaling
Which tumor suppressor protein is held together with cytosolic destruction complex targeted for degradation of β-catenin?
#Question id: 2858
#Unit 2. Cellular Organization
When lactose enters the cell, it is converted to allolactose. It is allolactose (rather than lactose itself) that controls the Lac repressor. Paradoxically, the conversion of lactose to allolactose is catalyzed by b-galactosidase, itself encoded by one of the lac genes. How is this possible? Which statement is incorrect according lac genes expressions?
#Question id: 31388
#Unit 2. Cellular Organization
#Question id: 10160
#Unit 6. System Physiology – Plant
Which of the following statements about the C4 cycle is true ?
a.) C4 plants uses the enzyme phosphoenolpyruvate carboxylase (PEPCase), rather than rubisco
b.) Unlike rubisco, O2 does not compete with HCO3 − in the carboxylation catalyzed by PEPCase
c.) initial carboxylation catalyzes in bundle sheath cells, four-carbon acids formed and flow across the diffusion barrier to the mesophyll cells
d.) during decarboxylation, releasing CO2 that is refixed by rubisco via the Calvin–Benson cycle
#Question id: 1281
#Unit 4. Cell Communication and Cell Signaling
Which of the following is the term used to describe a thin, sheet-like meshwork of extracellular matrix components that can be found in epithelial cells?