The sequence of σ54 is distinctly different from that of all the σ70-like factors, some characteristics about σ54 is given below;

a) The σ54-RNA polymerase binds to the glnA promoter and immediately melt the DNA strands and initiate transcription

b) σ54-polymerase does not require ATP hydrolysis to separate the strands at a start site only require activator such as   NtrC

c) σ54-RNA polymerase initiate transcription of glnA promoter only when it is activated by NtrC

d) ATP hydrolysis is required for activation of bound σ54-RNA polymerase by phosphorylated NtrC

Which of the following from the bove combination is INCORRECT?

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#Question id: 28465

#Unit 5. Developmental Biology

Optic vesicle secrete two paracrine factor for the lens formation these signalling factor known as___

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#Question id: 28466

#Unit 5. Developmental Biology

Mammalian fertilization occurs in _____

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#Question id: 28467

#Unit 5. Developmental Biology

Mammals exhibits which type of cleavage?

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#Question id: 28468

#Unit 5. Developmental Biology

which factor is required to initiate first cell division in mice?

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#Question id: 28469

#Unit 5. Developmental Biology

Which function is involved to the first differentiation event in mammalian development?

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#Question id: 28470

#Unit 5. Developmental Biology

blastomere of a 2-cell embryo can form both trophoblast cells and the embryo precursor cells of the ICM, these very early cells are said to be___.