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Nitrogen Fixation Quiz | Nitrogen Fixation Objective Type Questions and Answers

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Questions
21 The root nodules of legumes contain a pink pigment which has high affinity for oxygen is
A Nod Haemoglobin
B Leghaemoglobin
C Haemoglobin
D Bacterial Haemoglobin

Answer: Leghaemoglobin
22 The process of conversion of soil NO3- to N2 is called
A Nitrification
B Denitrification
C Ammonification
D Nitrogen Fixation

Answer: Denitrification
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23 Dinitrogenase reductase is a
A Monomer
B Dimer
C Trimer
D None of these

Answer: Dimer
24 Dinitrogenase is a
A Tetramer
B Monomer
C Dimer
D Trimer

Answer: Tetramer
25 All the following are free living N2 fixers except
A Azotobacter
B Rhodospirillum
C Clostridium
D Rhizobium

Answer: Rhizobium

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