#Question id: 1253
#Unit 4. Cell Communication and Cell Signaling
Following statements are regarding to the wnt signalling.
A. Wnt proteins interact with several cell-surface proteins and activate multiple downstream signal transduction pathways. The principal signaling receptor for Wnt proteins is Frizzled (Fz), which contains seven transmembrane α helices.
B. The palmitate attached to the Wnt protein binds to a specific site on the Fz intracellular domain and stabilizes the Wnt-Fz complex.
C. “canonical” Wnt signaling pathway uses a second transmembrane protein, LRP, that associates with Frizzled in a Wnt signal– dependent manner.
D. In the resting state, two kinases in the complex, casein kinase 1 (CK1) and GSK3, sequentially phosphorylate β-catenin on multiple tyrosine residues.
Which of the following statements are correct?
#Question id: 2780
#Unit 2. Cellular Organization
Which of the following pairs of proteins are considered to be paralogous?
#Question id: 2537
#Unit 2. Cellular Organization
Which of the following is the smallest structure that would most likely be visible with a standard (not super-resolution) research-grade light microscope?
#Question id: 2102
#Unit 2. Cellular Organization
In which of the following environments would there be the greatest need for osmoregulation?
#Question id: 21001
#Unit 12. Applied Biology