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Question 58

Siderophores are:

A. Proteins that bind tightly to iron
B. Nucleic acids in bacteria
C. Capsules
D. Lipids


Sagot :

Final answer:

Siderophores are organic molecules crucial for microbial iron uptake, binding ferric iron efficiently to enhance competition for this essential nutrient in the environment.


Explanation:

Siderophores are organic molecules synthesized by bacteria and fungi to chelate iron, increasing its availability in the environment. These molecules bind ferric iron using bidentate ligands like hydroxamate and catecholate groups in an octahedral arrangement.

Siderophores are crucial for microbial growth as iron is a growth-limiting micronutrient. They form stable complexes with Fe³+ due to the chelate effect, allowing efficient iron uptake by specific receptors on cell surfaces.

Overall, siderophores play a vital role in iron acquisition by microorganisms, enhancing their ability to compete for this essential nutrient in their surroundings.


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