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TLS Online TPP Program

#Question id: 28215

In the frog (Xenopus laevis) a gradient of the paracrine factor activin, which of the following observation is correct at the lower concentrations of activin ?

#Unit 5. Developmental Biology
  1. shows default gene expression instructed the cells to become blood vessels and heart
  2. activate the Xbra gene and instructed the cell to become muscle
  3. shows default gene expression instructed the cells to become muscle cells
  4. activate goosecoid gene and instructed the cell to become the frog’s dorsal-most structures
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TLS Online TPP Program

#Question id: 3922

#Unit 3. Fundamental Processes

The σ70 subunit in E. coli RNA polymerase acts as a/an __.
TLS Online TPP Program

#Question id: 3923

#Unit 3. Fundamental Processes

The transcription of __ RNA accounts for most of the transcriptional activity of a cell.
TLS Online TPP Program

#Question id: 3924

#Unit 3. Fundamental Processes

Characteristics of ligands involved in transcription include:
TLS Online TPP Program

#Question id: 3925

#Unit 3. Fundamental Processes

Constitutive genes
TLS Online TPP Program

#Question id: 3926

#Unit 3. Fundamental Processes

Positive regulation of a gene requires __.
TLS Online TPP Program

#Question id: 3927

#Unit 3. Fundamental Processes

An operon is __