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Class 11 Biology Chapter 12 Mineral Nutrition Quiz 7 (25 MCQs)

Quiz Instructions

Select an option to see the correct answer instantly.

1. During the Citric Acid Cycle, Coenzyme A merges with Oxaloacetic Acid to create citrate.

Correct Answer: A) True.

2. The enzyme, nitrogenase which is capable of nitrogen reduction is present exclusively in

Correct Answer: D) Prokaryotes.

3. What is the aim of Experiment V:Showing that Light is Necessary for Photosynthesis?

Correct Answer: A) To show that light is necessary for photosynthesis.

4. The amount of macronutrients per kg of dry matter is-

Correct Answer: B) Above 10 mmole.

5. A(n) ..... is a layer of cells in the roots and stems that regulates movement of water and nutrients

Correct Answer: C) Endodermis.

6. Which of the following is a wrong statement?

Correct Answer: B) Nitrogen is essential element required by the plants in the greatest amount. It absorbs mainly, the form of NO2-.

7. What is a common symptom of mineral deficiency in plants?

Correct Answer: D) Leaf discoloration.

8. Which of the following statements will not hold the true if a plant is grown in only sand(S), only clay (C) and only humus (H)?

Correct Answer: B) Ability of roots to penetrate (S) and (H) will be low as compared to (C).

9. Macronutrient which is component of all organic compounds but is not obtained from soil is

Correct Answer: D) Carbon.

10. What role do mycorrhizal associations play in plant nutrition?

Correct Answer: C) Enhance nutrient uptake.

11. Which of the following is a symptom of nitrogen deficiency in plants?

Correct Answer: C) Yellowing of leaves.

12. Ammonia is first oxidised to nitrite by the bacteria .....

Correct Answer: D) Both A and B.

13. Farmers cover plant bases with straw in cold seasons to reduce the effect of ..... (1) ..... temperature on the absorption of water and minerals by the ..... (2) .....

Correct Answer: A) Low; (2) Roots.

14. Thiobacillus is a group of bacteria helpful in carrying out

Correct Answer: D) Denitrification.

15. In which of the following all three are macronutrients?

Correct Answer: B) Nitrogen, Calcium, Magnesium.

16. What causes plants to "grow" towards light?

Correct Answer: A) Auxins in the stem (elongating on dark side).

17. The elements that are highly mobile in plants are ..... and .....

Correct Answer: A) N and Mg.

18. The xylem is composed of two types of cells:

Correct Answer: C) Tracheids and vessel elements.

19. Anoxygenic photosynthesis is characteristic of:

Correct Answer: A) Rhodospirillum.

20. Plants response to water .....

Correct Answer: A) Hydroptropism.

21. Plants absorb nitrogen in the form of .....

Correct Answer: A) Nitrates.

22. In plants, water and minerals are transported through which vascular system?

Correct Answer: C) Xylem.

23. What is the role of Magnesium in plants?

Correct Answer: C) Photosynthesis.

24. Choose wrong one.

Correct Answer: D) Amides have low N-to C ratio.

25. What is the primary role of Copper in plants?

Correct Answer: B) Enzyme activation.

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