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Class 11 Biology Chapter 12 Mineral Nutrition Quiz 3 (25 MCQs)

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1. The enzyme nitrogenase is highly sensitive to the
2. The common nitrogen-fixer in paddy fields is
3. An element which with the help of Na+ and K+, determines the solute concentration and anion-cation balance in cell is
4. When water molecules are attracted to water molecules, this is called .....
5. Which one is not a trace element / micronutrient-
6. ..... involves the transfer of an amino group from one amino acid to the keto group of a keto acid.
7. Is the breakdown of glucose molecules to release energy. (Occurs after photosynthesis)
8. Manganese is required for
9. The common BGA nitrogen-fixer in paddy fields is
10. The enzyme nitrogenase is a ..... protein and catalyses the conversion of atmospheric nitrogen to ammonia.
11. During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning is prevented by:
12. Minerals associated with redox reaction are-
13. I. Component of chlorophyllII. Helps to maintain ribosome structureIII. Activator for Rubisco and PepcoIV. Activates the enzymes of respiration and photosynthesisV. Involved in synthesis of nucleic acidsThe above roles are played by-
14. Passive mineral absorption occurs according to the principle of
15. Which one of the following is a wrong statement?
16. Monovalent ion primarily responsible for opening and closing of stomata is
17. I. Helps in the formation of middle lamellaII. Needed in spindle fibre formationIII. Accumulates in older leavesIV. Involved in normal functioning of cell membrane V. Activates certain enzymes like succinate dehydrogenase.The above list is associated with-
18. Plants response to grow towards or away from gravity
19. What is the primary function of Nitrogen in plants?
20. Which of the following can fix nitrogen in nonleguminous plants?
21. The first stable product of fixation of atmospheric nitrogen in leguminous plants is:
22. What are the three major factors affecting the rate of photosynthesis?
23. What is chlorosis in plants primarily caused by?
24. Minerals which maintain cation-anion balance in cells are-
25. What is the aim of Experiment I:Testing for Starch in a Leaf?
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