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With respect to iron nutrition and the iron cycle, what is the role of iron as relates to bacterial growth in humans? What is the role of iron with respect to bacterial nitrogen fixation of nitrogen in legumes growing in alkaline soil?

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Beverley Smith
Beverley SmithLv2
28 Feb 2018
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Related questions

What is the role of nitrogen-fixing organisms in the nitrogen cycle? How do legumes fit in?

"Helps fix nitrogen in soil. Boost pea and bean yields with Garden Soil Inoculant. Simply shake granules into furrows as you plant. It contains nitrogen-fixing bacteria to promote stronger root systems and larger harvests. Easy-to-use sprinkler top makes application a snap. 8.7-oz. container treats a 150' row." This product is recommended for growing plants such as beans and peas, for all of the following reasons EXCEPT: These plants can convert nitrogen gas to ammonia

These plants can convert nitrogen gas to ammonia

These plants form symbiotic relationships with bacteria in the product.

These plants are legumes.

These plants produce root nodules that harbor bacteria.

Molecular nitrogen (nitrogen gas) makes up 78% of the Earth’s atmosphere, but is unavailable for use by all organisms except for some nitrogen-fixing ____. (Choose all correct answers.)

bacteria

cyanobacteria

eukaryotes

prokaryotes

fungi

Protists

Nitrogen gas is a chemically inert molecule. The prokaryotes that fix-nitrogen produce the enzyme nitrogenase. What does this enzyme do that allows these organisms to use nitrogen gas? (Hint: You might want to consult a chemistry book to help you with this answer.)

In biological nitrogen fixation (N2, ammonia, hydrogen, oxygen), is (Reduced, oxidized) when it accepts atoms, resulting in the production of (nitrogen gas, nitrate, water, ammonia ) .

Legumes produce (nitrogen, nitrogenase, lehemoglobin,oxygen ,bacteria) , which regulates the amount of (nitrogen, nitrogenase, lehemoglobin,oxygen ,bacteria) present in the root nodule so (nitrogen, nitrogenase, lehemoglobin,oxygen ,bacteria) activity is not inhibited.

Humans and other animals acquire their nitrogen from which of the following? (Choose all correct answers.)

protein from animals that eat other animals

protein from animals that eat plants

plant protein

protein from legumes

The nitrogen sources used by humans are (organic, inorganic) componds, while nitrogen gas is an (organic, inorganic) compound.

Nitrogen is an important element in DNA and proteins; however,atmospheric nitrogen is the only source of this
element for life on Earth and itcannot be absorbed by eukaryotes. As a result, nitrogen? fixingbacteria species,
such as Rhizobia,live in a mutualistic relationship with plants like legumes. Thesespecies of bacteria are
obligate aerobes.

a. Explain what is meant by the term "obligate aerobe" and howthat relates to Rhizobia metabolism.

b. What is the role of each organism in theRhizobia?legume mutualistic relationship?

c. There is a theory that legumes are deliberately drivingRhizobia evolution by cutting off nutrient supplies
for those bacteria that fix less nitrogen. What would you expect tosee in a Rhizobiapopulation if this
theory is true and why?

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