Vg-1 and wnt are used in both frogs and chicks to establish a body axis, although in chicks this is the antero-posterior axis instead of the dorso-ventral axis. What is the region of the chick embryo that is thus analogous to the Nieuwkoop center?

TLS Online TPP Program

#Question id: 3935

#Unit 3. Fundamental Processes

Sequences that are removed from the primary RNA transcript in eukaryotes are called __.

TLS Online TPP Program

#Question id: 4033

#Unit 3. Fundamental Processes

Which of the following statements is false regarding the sigma-factor? 

A. It does not have a DNA-binding domain. 

B. Interaction with the core enzyme unmasks the DNA-binding region. 

C. Subregions 2.4 and 4.4 are involved in promoter recognition. 

D. It can also bind to the nontemplate strand. 

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#Question id: 11504

#Unit 9. Diversity of Life Forms

Which organisms represent the common ancestor of all photosynthetic plastids found in eukaryotes?

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#Question id: 24610

#Unit 2. Cellular Organization

Choose which of the following statement is correct

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#Question id: 11304

#Unit 2. Cellular Organization

In what way do the membranes of a eukaryotic cell vary?