Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 6021
TLS Online TPP Program

#Question id: 7221

The cells of the neural plate are characterized by expression of the Sox family of transcription factors (Sox1, 2, and 3). These factors-

#Unit 5. Developmental Biology
  1. Activate the genes that specify cells to be neural plate and inhibit the formation of epidermis and neural crest by blocking the transcription and signaling of BMPs.
  2. Inhibit the genes that specify cells to be neural plate and activate the formation of epidermis and neural crest by blocking the transcription and signaling of BMPs.
  3. Activate the genes that specify cells to be neural plate as well as formation of epidermis and neural crest.
  4. Inhibits both the genes that specify cells to be neural plate as well as formation of epidermis and neural crest.
More Questions
TLS Online TPP Program

#Question id: 8919

#Unit 9. Diversity of Life Forms

The last common ancestor of all animals was probably a
TLS Online TPP Program

#Question id: 19097

#Unit 4. Cell Communication and Cell Signaling

Erwinia is a pathogen that deploy__
a) Attacking Initial biotrophic phase and extensive plant tissue damage at later stages or even death
b) Intimate intracellular contact with plant cells and minimal plant cell damage
c) Releases pectic enzyme that dissolve the cell wall
TLS Online TPP Program

#Question id: 5682

#Unit 5. Developmental Biology

During prevention of polyspermy in sea urchin the shift from ___1___ to __2____is the result of a small influx of Na+ into the egg through newly opened sodium channels. Sperm cannot fuse with egg cell membranes that have a ___3___ resting potential, so the shift means that no more sperm can fuse to the egg.
TLS Online TPP Program

#Question id: 4172

#Unit 3. Fundamental Processes

Which statement is true about the number of initiation and STOP codons?
TLS Online TPP Program

#Question id: 26939

#Unit 10. Ecological Principles

Some of the following characteristics of population are given, Except?