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2 years ago

Describe the action mechanism of labile toxin by placing the steps in the correct order.

1 answer:

6 0

I cannot found the exercise anywhere, so I will just explain how the toxin works.

A toxin is a toxic substance made by a living organism such as a bacterium, a fungus, a plant or an animal.

Labil toxins are toxins which are by easily degraded. among these toxins, there is the toxin of Escherichia coli and the cholera toxin of Vibrio cholerea.

The intracellular target of cholera toxin is adenylate cyclase, one of the most important eukaryotic cell regulatory systems. This enzyme is involved in the conversion of ATP into a cyclic AMP (cAMP), a crucial intracellular messenger in a wide variety of cellular processes.
Cholera toxin catalyzes the transfer of ADP-ribose from NAD (Nicotinamide Adenine Dinucleotide) to a specific arginine residue of the Gsa protein, resulting in the activation of adenylate cyclase and consequently the increase of the intracellular level cAMP. AMPc activates a cAMP-dependent protein kinase, which leads to phosphorylation of the protein, modification of ion transport and finally diarrhea.

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How does the photolysis of water benefit the biosphere?

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2 years ago

Explain the carbon dioxide cycle. Use the words photosynthesis and respiration in your answer.

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2 years ago

Consider the following three populations of birds. Assume HW equilibrium. With these birds red coloring is recessive, while brow

bixtya [17]

Answer:

Red allele frequency will be highest in population II

Population III can undergo bottleneck effect

The frequency of the brown allele will least likely be altered in the population I

Explanation:

Population I -

Total population - $670$

Brown birds - $603$

Red birds - $67$

Population II

Total population - $100$

Brown birds - $90$

Red birds - $10$

Population III

Total population - $30$

Brown birds - $27$

Red birds - $3$

Frequency of red birds in population I

$\frac{67}{670} = 0.1$

Frequency of red birds in population II

$\frac{10}{90} = 0.11$

Frequency of red birds in population III

$\frac{3}{30} = 0.1$

Red allele frequency will be highest in population II and it will be equal to $\sqrt{0.11} = 0.33$ as compared to $0.31$ in case of population I and III

Population III can undergo bottleneck effect because of smaller population size

The frequency of the brown allele will least likely be altered in the population that has highest brown individual , i.e population I

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3 years ago

What modifies and transports proteins?

Alexandra [31]

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3 years ago

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At the end of translation, a ___________ or protein is released. Question 6 options: Polysaccharide Lipid Polypeptide

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Polypeptide

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3 years ago