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TLS Online TPP Program

#Question id: 1239

GTPases serve in many signal transduction pathways and the presence of GTP or GDP dictates whether the pathway is on or off, respectively. Which of the following statements is TRUE regarding guanine nucleotide exchange factors (GEF) and the role in these signaling pathways?

#Unit 4. Cell Communication and Cell Signaling

  1. They hydrolyze GTP into GDP and Pi.

  2. They decrease the GTPase activity of the G-protein.

  3. They catalyze the dissociation of GDP on the G-protein and promote the replacement of GTP.

  4. They catalyze the dissociation of GTP on the G-protein and promote the replacement of GDP.

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TLS Online TPP Program

#Question id: 7542

#General Aptitude

Two trains travel in opposite directions at 55km/hr and 53km/hr and a man sitting in slower train passes the faster train in 5.5 second. The length of the faster train (in meters) is
TLS Online TPP Program

#Question id: 28425

#Unit 5. Developmental Biology

The one sheet of cells into two sheets of cells formation during hypoblast formation in avian embryogenesis is termed as__ 
TLS Online TPP Program

#Question id: 1376

#Unit 4. Cell Communication and Cell Signaling

Which of the following statements is NOT TRUE about gap junctions?
TLS Online TPP Program

#Question id: 26350

#Unit 2. Cellular Organization

Heterochromatic regions, silenced genes, and gene-sparse regions of chromosomes are typically localized to the.
TLS Online TPP Program

#Question id: 11768

#Unit 10. Ecological Principles

As documented by peter and rosemary grant, the population of the medium ground finch on the tiny island of Daphne major in the Galápagos archipelago responded how to changes in food resources associated with climate changes: