Micronutrients in diet are essential for various cellular fu

Micronutrients in diet are essential for various cellular function. which divalent cation is essential in diet for the proper functioning of many signaling pathways? A. Ca^2+ B. Mg^2+ C. Fe^2+ D. Zn^2+ Answer the following questions briefly (In one or two sentences) X Y and Z are three components of a regulatory system. Both X and Y are transcription activators. How might X, Y and Z interact so as to form a sign sensitive delay element? Show graphically how such a sign sensitive delay element will effect gene expression While studying the regulation of two genes A and B, a scientist finds the steady state concentration of B to be much more susceptible to fluctuations compared to A? Why do you think this is the case? The rate of transcription of a gene Y was found to be reduced in a mutant cell line. However while mapping the mutation, it was found to be present not in gene Y but in gene X, which is a transcriptional activator of gene Y. Write down three possible effects that the mutation might be having on X, so as to reduce the transcription of Y.

Solution

In the context of a regulatory interaction, the steady state concentration of gene B is much more susceptible to fluctuations then gene A describes a narrow range of expression levels
within which gene B abundance is maintained despite small perturbations
in the expression of its regulatory TF.RNA concentration of gene B depends on transcription and degradation rates of gene B
This will depend on the kinetics of
synthesis and degradation of the target gene.