Mineral Nutrition Class 11 Biology Important Questions
Please refer to Mineral Nutrition Class 11 Biology Important Questions with answers below. These solved questions for Chapter 12 Mineral Nutrition in NCERT Book for Class 11 Biology have been prepared based on the latest syllabus and examination guidelines issued by CBSE, NCERT, and KVS. Students should learn these solved problems properly as these will help them to get better marks in your class tests and examinations. You will also be able to understand how to write answers properly. Revise these questions and answers regularly. We have provided Notes for Class 11 Biology for all chapters in your textbooks.
Important Questions Class 11 Biology Chapter 12 Mineral Nutrition
Question. Denitrification is carried out by
Question. Which of the following represents the abiotic mode to convert nitrogen to nitrogen oxides into the soil?
Question. The enzyme _______ which is capable of nitrogen reduction is present exclusively in prokaryotes. Such microbes are called_____.
(a) hydrogenase, N2-fixers
(b) nitrogenase, N2-fixers
(c) hydrogenase, aerobic microbes
(d) nitrogenase, aerobic microbes
Question. Which one of the following is free-living, anaerobic nitrogen-fixer ?
Question. Which of the following plants will enrich the soil with nitrogen?
(c) Wheat grass
Question. Pigment present in the root nodules of legume is
Question. Asparagine and glutamine are the two most important
(a) amino acid
(c) imino acid
Statement Type Questions
Question. Which of the following statements are correct ?
(i) Solution culture/hydroponics contains all essential minerals except one, the usefulness of which is to be
(ii) Na, Si, Co and selenium are beneficial element required by higher plants.
(iii) Zn is the activator of nitrogenases while Mo is the activator of alcohol dehydrogenase.
(iv) Zn is needed for auxin synthesis.
(a) (i), (ii), (iii)
(b) (i), (ii), (iv)
(c) All of these
(d) None of these
Question. Refer the given statements and answer the question.
(i) The element must be absolutely necessary for supporting normal growth and reproduction.
(ii) The requirement of the element must be specific and not replaceable by another element.
(iii) The element must be directly involved in the metabolism of the plant.
The above statements apply to
(a) Criteria for hydroponics
(b) Criteria for essentiality
(c) Role of micronutrients
(d) Role of macronutrients
Question. The functions given below are performed by which of the following mineral ?
(i) An important constituent of proteins involved in ETS.
(ii) Activator of catalase.
(iii) Essential for chlorophyll synthesis.
Assertion/Reason Type Questions
In the following questions, a statement of Assertion is followed by a statement of Reason.
(a) If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.
(b) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.
(c) If Assertion is true but Reason is false.
(d) If both Assertion and Reason are false.
Question. Assertion : Macromtrients are generally present in plant tissues in large amounts (in excess of 10 mmole kg-1 of dry matter)
Reason : Macronutrient includes iron manganese copper, molybdenum, zinc, boron, chlorine and nickel
Question. Assertion : Chlorosis is the loss of chlorophyll leading to yellowing of leaves.
Reason : This symptom is caused by the deficiency of elements N,K, Mg, S, Fe and Mo.
Critical Thinking Type Questions
Question. Which of the following is an anaerobic N2 fixing bacterium?
Question. Nitrogen fixation by organisms requires conditions that are
(c) saturated with sunlight
(d) free of water
Question. At physiological pH, for the formation of ammonium ion, ammonia is
Question. A gardner purchases a commercial fertilizer. The label says that it is 10-20-10. This label refers to the
(a) percentage of nitrogen, phosphate and potassium.
(b) percentage of nitrogen, carbon and oxygen.
(c) rate at which nitrogen is released from the fertilizer.
(d) ratio of organic to inorganic matter in the fertilizer.
Question. Which of the following can fix atmospheric nitrogen ?
Question. In plant nutrition, elements are classified as major or minor nutrients depending on
(a) their availability in the soil.
(b) their relative production in the ash obtained after burning the plants.
(c) the relative amounts required by the plants.
(d) their relative importance in plant growth.
Question. The most abundant gas in our atmosphere cannot be utilized by plants directly in its atmospheric form and is, therefore, captured by certain bacteria that live symbiotically in the nodules of roots. Identify the gas?
Question. In plants a common symptom caused by deficiencies of Cu, K, Ca and Mg is the
(a) formation of anthocyanin.
(b) bending of leaf tip.
(c) poor development of vasculature.
(d) appearance of dead necrotic tissues.
Question. Which of the following groups contain no species that are able to fix nitrogen ?
(a) Cyanobacteria in the ocean and fresh water.
(b) Soil bacteria including Rhizobium.
(c) Cyanobacteria in lichens.
(d) Aerobic bacteria in the genera Bacillus and Pseudomonas.
Diagram Type Questions
Question. The given diagram shows hydroponic/soilless plant production. Plants are grown in a tube or trough placed on a slight incline. The arrows indicate the direction of flow of nutrient solution.
Nutrient solution is sent to the elevated end of the tube from the reservoir by X and it flows back to the reservoir due to Y . Identify X and Y.
(a) pump, pump
(b) gravity, gravity
(c) pump, gravity
(d) gravity, pump
Question. The given diagram shows the development of root nodule in soyabean. Thus structures are marked as A, B, C and D.
Identify the correct labelling of A, B, C & D.
(a) A-Rhizobial bacteria; B-Cortex cell; C-Outer cortex; D-Infection thread containing virus.
(b) A-Rhizobial bacteria; B-Cortex cell; C-Inner cortex and pericycle cells; D-Infection thread containing bacteria
(c) A-Rhizobial bacteria; B-Endodermal cell; C-Inner endodermis; D-Infection thread containing virus
(d) A-Nitrosomonas bacteria; B-Cortex cell; C-Inner cortex and pericyele cells; D-Infection thread containing bacteria.