With regard to the Biological Nitrogen Fixation by Rhizobium in association with soybean, which one of the following statement/ statements does not hold true?

Nitrogenase may require oxygen for its functioning

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Nitrogenase is Mo-Fe protein

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Leghaemoglobin is a pink coloured pigment

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Nitrogenase helps to convert

N_{2}

gas into two molecules of ammonia.

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Solution

The correct option is A Nitrogenase may require oxygen for its functioning
Nitrogenase is a unique enzyme that is critical to the bacteria that utilizes this enzyme. Its function is necessary for anaerobic bacteria since it is their main source of nitrogen. Nitrogenase is a sensitive enzyme that can easily be inhibited by oxygen and other compounds and affects its ability to fix nitrogen.

So, the correct answer is "Nitrogen may require oxygen for its functioning."

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Similar questions

Rhizobium helps in fixation of atmospheric nitrogen into ammonia.

Nitrogen fixation is a process in which nitrogen ( $N_{2}$ ) in the atmosphere is converted into ammonium ${N H_{4}}^{+}$ or nitrogen dioxide ( $N O_{2}$ ). Which of the following is/are responsible for this?

Question 7
Choose the correct statement with respect to nitrogen fixation:

Statement 1: Nitrogen fixation process is involved in converting nitrogen gas into nitrogenous compounds.

Statement 2: Root nodules of the non-leguminous plants help in the process of nitrogen fixation.

Refer the given passage and answer the following questions

At present, the primary nutrient which limits the agricultural yield is nitrogen (N). Some plants are capable to produce more

N_{2}

than they consume. These plants show a symbiotic relationship with

N_{2}

-fixing bacteria such as Rhizobium. These bacteria produce root nodules in leguminous plants and convert atmospheric

N_{2}

into nitrogenous compounds. Rhizobium bacteria are gram-negative bacteria, which show host specificity and fix

N_{2}

in the presence of a red pigment called leghaemoglobin. It protects nitrogen-fixing enzyme nitrogenase from oxygen.

Read the given statements and select the correct answer.

Statement 1: Rhizobium bacteria can also live freely in the soil and carry out

N_{2}

-fixation by themselves.
Statement 2: Such Rhizobium bacteria are called free-living

N_{2}

-fixing bacteria.

Q55) Consider the following statements:

i) Rhizobium changes nitrogen into ammonium ions

ii) Rhizobium bacteria found on root nodules of legumes

iii) Nitrification converts ammonia into nitrates.

Which of the above statements are true?

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