<h2>b) option is correct </h2>
Explanation:
- Some bacterial toxins cause disease by altering the activity of G protein, cholera toxin is one of them
- Cholera toxin catalyse ADP ribosylation of Gs and blocks GTPase activity thus Gs GTP become permanently active
- Constitutive activation of Gs protein continuously induce adenylyl cyclase, cytosolic cAMP level rises that leads to activation of protein kinase A (pKA)
- Activated pKA catalyse phosphorylation of two transmembrane proteins of intestinal epithelial cells:
- CFTR cause excessive outflow of Cl- ion and Na+ H+ exchange cause efflux of Na+ ion, both enters in gut and form Na+ Cl-
- Na+Cl- leads to outflow of water from the gut, resulting in diarrhea and dehydration and this condition may cause death of organisms due to loss of water and ions
Answer:
what are two parts of the mitochondria?
Mitochondrial matrices and cristae
Explanation:
Mitochondria matrices makes up the spaces in-between the inner membrane while the mitochondria cristae resulted as a result of folding inwards of the inner membrane.
Answer:
the higher the diversity, the higher the populations of all the
photosynthetic organisms
Explanation:
Diversity in plant allows random mating also known as panmixia. It allows plant have equal chances of being mated too by any among them creating variations in the population. It leads to less fixed gene, reduce genetic drift leading to an increases population as some lethal gene may be lost due to recombination of gene among individual plant.
Where there is no diversity some gene becomes fixed leading to perpetuation of some traits that may be harmful in a population but diversity allows for the generation of new gene and allele frequency within a population.
Answer:
true
Explanation:
I think it's True, I hope its right
Answer:
In diarrhea, gut motility is increased. Whatever is ingested, comes out quicker.
Polio drops contain attenuated polio virus. Once given, a large proportion of this viral dose stays in intestine and proliferates to show it’s effect.
If given during diarrhea, with increased motility of gut, most of it will be thrown out fast, resulting in to lesser efficacy. For this very reason we wait till diarrhea is over.
Explanation:
:)
