Which of the following statement justified that the PMZ in chick is functionally equivalent to the amphibian Nieuwkoop center?

A. The posterior marginal zone produces Wnt8c and that, the PMZ cells secrete Vg1, a member of the TGF-β family.

B. PMZ cells capable of inducing the accumulation of β-catenin

C. PMZ cells secretes BMP, a member of the TGF-β family.

D. PMZ secretes its own Nodal antagonist—the Lefty protein.

Which of the following combination is correct?

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#Question id: 7541

#General Aptitude

A train travelling at 54km/hr completely crosses another train having half its length and travelling in opposite direction in 18km/hr in 30 second. It also passes a railway platform in 40 seconds. The length of the platform (in meters) is

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#Question id: 28047

#Unit 1. Molecules and their Interaction Relevant to Biology

Protein A will fold into its native state only when protein B is also present in the solution. However, protein B can fold itself into native confirmation without the presence of protein A. Which of the following is true? 

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#Question id: 3993

#Unit 3. Fundamental Processes

An example of coordinate control is the down-regulation of ribosomal RNA synthesis in response to amino acid starvation, which will cause synthesis of ribosomal proteins to be limited.  What is the correct order of the following events that participate in the signaling process?

1. Binding of stringent factor to the ribosome.

2. Formation of the unusual nucleotide ppGpp.

3. Formation of the unusual nucleotide pppGpp.

4. Uncharged tRNA binds in the ribosomal A-site.

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#Question id: 29501

#Unit 6. System Physiology – Plant

Cryptochromes under blue light causes

a. Promotion of cotyledon expansion

b. Membrane depolarization

c. Circadian clock entrainment

d. Inhibition of petiole elongation

Which of the following is correct

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#Question id: 15479

#Unit 12. Applied Biology

Out of the following what usually supports the fastest growth rate and is therefore considered the preferred nitrogen source for E. coli