Answer:
DNA binding domain and allosteric domain
Explanation:
Repressors are proteins that inhibit gene expression, They usually have DNA or RNA binding site which enables them to binde to the operator or associated silencers. Allosteric domain is the site for the binding of other molecules, such as corepressors and inducers that regulate repressor's activity.
<span>The correct answer is cGMP.</span>
<span>cGMP, during the dark (when there are no stimulations of photoreceptor cells), reaches high intracellular levels. When the light stimulation occurs cGMP levels decrease because it is converted to GMP by phosphodiesterase. Phosphodiesterase is activated by transducin which is activated by excited rhodopsin (contains photopigment).</span>
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Low levels of cGMP block the cGMP gated ion channels and that prevents the entry of Na and Ca. Because of that membranes becomes more negative, hyperpolarization occurs and this creates a signal for the next cell.</span>
Kingdom Protista is probably comprised of groups of organisms that may not be closely related, and are undergoing continual assessment
<h3>What are the six - kingdoms of life?</h3>
The discovery of archaebacteria complicates the five-kingdom classification system for living organisms, which includes the prokaryotic Monera and the eukaryotic Protista, Fungi, Plantae, and Animalia. The prokaryotic Monera are divided into three groups: regular bacteria or eubacteria, cyanobacteria (also known as blue-green algae), and archaebacteria. Archaebacterial cell membrane lipids differ significantly from those of prokaryotic and eukaryotic cells, as do their cell wall composition and ribosomal RNA subunit sequence. Furthermore, recent research has revealed that archaebacterial RNA polymerases resemble eukaryotic enzymes rather than eubacterial RNA polymerase.
Archaebacteria have introns in some genes, an advanced eukaryotic feature previously unknown in prokaryotes.
To learn more about kingdoms of life from the given link
brainly.com/question/1275968
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uranium lasts roughly 6 -7 years
C. Is the answer to that question
