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A cell has 10 microM (micro-Molar) Ca2+ inside and 2 microM Ca2+ outside its terminal bouton. Threshold for voltage-gated Ca2+ channels in this bouton is -20 mV. What is the Ca2+ equilibrium potential? Assuming that release mechanisms are similar to those in other neurons, will this axon be able to release neurotransmitter? Why or why not?
If repressor tetramer uses only two of its subunits to bind to an operator sequence, why is tetramer formation so important to the control of lac operon gene expression.
Describe how protein hormones versus steroid hormones play a role in transducting signals that can affect gene transcription?
Provide a possible explanation as to why this test identifies the presence of cytochrome c oxidase and not the other electron carries.
q. if the centrioles are mispositioned in the cell the functional mitotic spindle would fail to form. in this state how
The parasympathetic nervous division is central to maintaining homeostasis of the body. Pick one of the oxygen delivery organs and one of excretory or digestive organs.
You get a soil sample and run an enrichment culture on it. You give the organisms in the culture with all of the ingredients required for growth except for nitrogen. What result do you expect to have at the end of the experiment.
Explain briefly the division of the cerebrum into hemispheres and lobes. Determine what are the primary functions of each lobe?
For each of the E. coli strains given below, estimate the effect of the genotype on expression of the trpE and trpC genes in the presence and absence of tryptophan.
Explain about the cell wall and nucleoid of bacterial cell, their structure and composition in detail. Explain the functions of the sensory neurons, interneurons, and motor neurons in the nervous system in brief.
The Heliconius butterflies are a classic example of Müllerian mimicry. Which of the following defines a pair of species exhibiting Müllerian mimicry and which of the following defines an obligate mutualistic relationship
Explain how a mutation could inhibit the binding of sigma factor to DNA. Describe two specific base substitutions you think would inhibit the binding of sigma factor. Explain why you think your base substitutions would have this effect.
A researcher infects a bacterium with a bacteriophage and notices that the infection does not immediately bring about the destruction of the host cell. Instead, the phage genetic material is copied whenever the host reproduces. Which viral replica..
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