Mineral Nutrition NEET MCQ

 Q31. The pink coloured pigment produced in root nodules of leguminous plant 

(1) Is oxygen scavenger

(2) Is produced by plant only 

(3) Protects nitrogenase 

(4) Both (1) and (3)

Ans.4

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Q32. The element which is a constituent of the ring structure of chlorophyll and the element involved in opening and closing of stomata are respectively 

(1) Mn, Cl          (2) Mg, P 

(3) Fe, S             (4) Mg, K

Ans.4

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Q33. Which of the following is not related to mineral element Zn? 

(1) Activates enzyme carboxylase 

(2) Responsible for carbohydrate translocation 

(3) Causes little leaf disease in plants 

(4) Needed in the synthesis of auxin

Ans.2

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Q34. Reductive amination does not require (1) a-ketoglutaric acid 

(2) NADPH 

(3) Transaminase 

(4) NADP

Ans.3

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Q35. Choose the correct match. 

(1)Nitrogenase     -Sensitive to                                                                        

                                 molecular O₂ 

(2)Leghaemoglobin- Synthesised 

                                      by bacteria 

                                      only 

(3)Azotobacter       - Free living 

                                    anaerobic 

(4)Anabaena           - Free living 

                                    nitrifying 

                                    bacteria

Ans.1

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Q36. How many electrons and protons are required for reduction of one molecule of nitrogen? 

(1) 6e– & 6H+       (2) 8e–& 8H+ 

(3) 12e– & 12H+  (4) 16e– & 16H+

Ans.2

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Q37. Most common amides in plants are

(1) Asparagine and glutamic acid 

(2) Glutamine and asparagine 

(3) Transported through phloem 

(4) Formed by transamination

Ans.2

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Q38. Find out correct match 

(1)Necrosis-Ca, Mg, Na 

(2)Chlorosis-Zn, Mo, Mg 

(3)Delay in flowering-N, K, Si, Mo 

(4)Inhibition of - Ca, Mg, Co, K

     cell division 

Ans.2

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Q39. Rhizobium in root nodules 

(1) Behave like obligate aerobe 

(2) Become anaerobic 

(3) Live as chemoautotrophs 

(4) Release auxin and GA3 for enlargement of root cells

Ans.2

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Q40. Ammonia is oxidised to nitrite by

(1) Nitrosomonas 

(2) Azotobacter 

(3) Rhodospirillum 

(4) Frankia

Ans.1

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