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TLS Online TPP Program

#Question id: 1809

Which of the following statements is TRUE of αβ T-cells?

#Unit 4. Cell Communication and Cell Signaling

  1. αβ T-cells initially express a pre-TCR bearing an invariant pre-β chain

  2. αβ T-cells express RAG-1 and RAG-2 at the pre-T stage

  3. αβ T-cells can be CD4+CD8− but not CD4−CD8+

  4. Unlike γδ T-cells, αβ T-cells do not rely on Notch-1 signaling pathways during their development

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TLS Online TPP Program

#Question id: 28877

#Unit 4. Cell Communication and Cell Signaling

O-acetyltransferase Porcupine is an enzyme which catalyzes?
TLS Online TPP Program

#Question id: 32245

#Unit 2. Cellular Organization

During the formation of a clathrin-coated bud, which of the following proteins are important in shaping the neck of a budding vesicle?
TLS Online TPP Program

#Question id: 293

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following types of bonds or interactions between lipid hydrocarbon tails is responsible for lipids forming a membrane bilayer or membranous vesicles in water
TLS Online TPP Program

#Question id: 8858

#Unit 9. Diversity of Life Forms

Which of these factors, when used to label the horizontal axis of the graph in Figure 33.1, would account most directly for the shape of the plot?


TLS Online TPP Program

#Question id: 1992

#Unit 4. Cell Communication and Cell Signaling

How do antibodies of the different classes IgM, IgG, IgA, IgD, and IgE differ from each other ?