Please see Chapter 12 Mineral Nutrition Exam Questions Class 11 Biology below. These important questions with solutions have been prepared based on the latest examination guidelines and syllabus issued by CBSE, NCERT, and KVS. We have provided Class 11 Biology Exam Questions and answers for all chapters in your NCERT Book for Class 11 Biology. These solved problems for Biomolecules in Class 11 Biology will help you to score more marks in upcoming examinations.
Exam Questions Chapter 12 Mineral Nutrition Class 11 Biology
Objective Questions
Question. Choose wrong one
(a) N2– fixation needs anaerobic condition
(b) ATP that is used in nitrogen fixation comes from respiration of host cells
(c) Amides– serves as protein precursors key compound for nitrogen transport and storage.
(d) Amides have low N– to C ratio
Answer
D
Question. Which of the following is not one of the three elements that provide the framework/ Structural elements of the cells and component of biomolecules?
(a) C
(b) H
(c) Fe
(d) N,O
Answer
C
Question. Which of the following choices is not one of the three plant macronutrients in most fertilizers?
(a) O
(b) N
(c) P
(d) K
Answer
A
Question. Out of the 4 most abundant elements in most plants [C,H,O and N], which one does a terrestrial green plant obtain mainly through its roots from the soil?
(a) H and O
(b) H and N
(c) C and O
(d) O and N
Answer
A
Question. Which of the following technique can researchers use to explore plant nutrients deficiencies?
(a) Hydroponics
(b) Sun exposure
(c) Crop rotation
(d) Hyperbaric chambers
Answer
A
Question. Which one of the following roles is not characteristic of an essential element?
(a) Being a component of biomolecules
(b) Changing the chemistry of soil
(c) Being a structural component of energy–related chemical components.
(d) Activation and inactivation of enzymes
Answer
B
Question. To the plants soil is not the source of
(a) C
(b) H
(c) O
(d) All
Answer
D
Question. Which is not criterion for essentiality of mineral?
(a) Direct role in metabolism
(b) Requirement is specific
(c) Dispensable for growth
(d) Deficiency causes hunger sign
Answer
C
Question. Which one is not a trace element/ micronutrient?
(a) Mn
(b) Cu
(c) Mo
(d) K
Answer
D
Question. Plants acquire minerals from the soil by
(a) Recycling them
(b) Growing
(c) Rain water
(d) Soil microbes
Answer
D
Question. Which of the following scientist for the first time demonstrated the experiment on hydroponics?
(a) Von sachs
(b) Arnon
(c) Knop
(d) Skoog
Answer
A
Question. The essential elements which are required by plants in large amounts are called________ and those required in very small amount by the plants are called_________.
(a) micronutrients, macronutrients
(b) bulky elements, trace elements
(c) macronutrients, micronutrients
(d) trace elements, bulky elements
Answer
C
Question. The major role of minor elements inside living organisms is to act as
(a) binder of cell structure.
(b) co-factors of enzymes.
(c) building blocks of important amino acids.
(d) constituent of hormones.
Answer
B
Question. Which of the following element activate an enzyme, nitrogenase during nitrogen metabolism?
(a) SO4 2–
(b) Mg2+
(c) K+
(d) Mo
Answer
B
Question. Which of the following essential element is required for photochemical reaction involved in photolysis of water?
(a) Cu2+
(b) Cl –
(c) Zn2+
(d) Mg2+
Answer
B
Question. Which of the following elements in plants are relatively immobile and are a part of the structural component of the cell?
(a) Sulphur and calcium
(b) Sulphur and potassium
(c) Calcium and magnesium
(d) Potassium and magnesium
Answer
A
Question. Which of the following is not caused by deficiency of mineral nutrition?
(a) Necrosis
(b) Chlorosis
(c) Etiolation
(d) Shortening of internodes
Answer
C
Statement Type Questions
Question. Which of the following statement is incorrect ?
(a) Soil supplies minerals, harbours N2-fixing bacteria and other microbes, holds water, supplies O2 to root at acts as matrix that stabilises the plant.
(b) Both macro and micronutrients forms component of fertilizers and are applied as per need.
(c) Weathering and breaking down of rock enrich the soil with dissolved ions and inorganic salts.
(d) Denitrification is not done by bacteria Pseudomonas and Thiobacillus.
Answer
D
Question. Which of the following statements about nitrification is not correct ?
(a) Nitrobacter oxidizes nitrite to nitrate.
(b) Nitrosomonas and Nitrosococcus convert ammonium ions to nitrite.
(c) Nitrification reactions are energy-producing (exergonic) reactions.
(d) Heterotrophic plants are more directly dependent on the nitrifying bacteria for usable nitrogen than
autotrophic plants.
Answer
D
Question. Read the following statement and answer the question Infected thread carries the bacteria to the inner ‘X’ cells. The bacteria get modified into rod-shaped bacteroids and cause inner ‘X’ and ‘Y’ cells to divide. Division and growth of ‘X’ and ‘Y’ cells lead to nodule formation.
Identify ‘X’ and ‘Y’.
(a) X-pericycle, Y – cortical
(b) X – cortical, Y – pericycle
(c) X – endodermis, Y – cortical
(d) X – epidermis, Y -pericycle
Answer
B
Question. How many of the given statements are correct?
(i) The deficiency of any element can cause multiple symptoms.
(ii) Same symptoms may be caused by the deficiency of one or several different elements.
(iii) The concentration of the essential element below which plant growth is retarded is termed as critical
concentration.
(iv) Chlorosis is the loss of chlorophyll due to deficiency of N, K, Mg, Fe, S, Mn, Zn Mo.
(v) Different plants respond differently to the deficiency of the same element.
(a) (iii) and (iv)
(b) (i) and (iv)
(c) (i) and (iii)
(d) All of these
Answer
D
Question. Which of the following statements are incorrect ?
(i) The morphological changes are indicative of certain element deficiencies and are called deficiency
symptoms.
(ii) The part of plants that show the deficiency
symptoms depend on the mobility of the element in the plant.
(iii) Deficiency symptoms appear first in the young tissues whenever the element are relatively mobile.
(iv) The deficiency symptoms of Cl, Z, N, O, are visible first in the senescent leaves.
Of the above statements.
(a) (iii) and (iv)
(b) (i) and (iii)
(c) (i) and (iv)
(d) (ii) and (iv)
Answer
A
Critical Thinking Type Questions
Question. Which of the following element is involved in plants for protein synthesis?
(a) Potassium
(b) Calcium
(c) Iron
(d) Zinc
Answer
A
Question. The minerals involved in the synthesis of DNA and RNA, for maintenance of the turgidity of cells and for the activation of the enzyme catalase are respectively
(a) potassium, magnesium, chlorine
(b) sulphur, potassium, iron
(c) phosphorus, potassium, chlorine
(d) magnesium, potassium, iron
Answer
D
Question. Which one of these do plants require for the formation of adenosine triphosphate?
(a) N, Cu
(b) N, Ca
(c) N, P
(d) N, K
Answer
C
Question. A small aquatic plant was put in each of the petridishes -X, Y & Z, containing different culture solutions. After six weeks the plant in dish X had the same number of leaves as it had previously & were all small and yellowish. Plant in dish Y had more leaves of normal size and dark green colour. Plants in dish Z had more leaves of normal size but very pale. Which of the following show the element missing in the culture?
| X | Y | Z |
| (a) Magnesium | Phosphorus | Nitrogen |
| (b) Phosphorus | Magnesium | Nitrogen |
| (c) Phosphorus | Nitrogen | Magnesium |
| (d) Magnesium | Nitrogen | Phosphorus |
Answer
A
Question. Biological nitrogen fixation is the
(a) reduction of nitrogen to ammonia by living organisms.
(b) oxidation of nitrogen to ammonia by living organism.
(c) conversion of nitrogen to ammonia by UV radiation.
(d) conversion of ammonia to nitrogen by electrical discharge.
Answer
A
Matching Type Questions
Question. Match the items given in column-I with their examples given in column-II and choose the correct answer.
| Column-I | Column-II |
| A. Free living aerobic nitrogen fixers | I. Anabaena and Nostoc |
| B. Anaerobic nitrogen fixers | II. Pseudomonas and Thiobacillus |
| C. Nitrogen fixing cyanobacteria | III. Nitrosomonas and Nitrococcus |
| D. Denitrifying bacteria | IV. Azotobacter and Beijernickia |
| E. Nitrifying bacteria. | V. Rhodospirillum |
(a) A – IV, B – V, C – I, D – II, E – III
(b) A – V, B – IV, C – I, D – III, E – II
(c) A – IV, B – V, C – II, D – III, E – I
(d) A – IV, B – III, C – I, D – II, E – V
Answer
A
Question. Match the column-I containing minerals with the functions given in column-II and choose the correct combination given.
| Column-I (Minerals) | Column-II (Functions) |
| A. K | I. Stomatal opening |
| B. Mo | II. Constituent of cell membrane |
| C. P | III. Photolysis of water |
| D. Mn | IV. Free ion |
| V. Component of nitrogenase and nitrate reductase |
A B C D
(a) I, IV V II III
(b) I, V IV III II
(c) I , V IV II III
(d) IV I III II, V
Answer
A
Question. Match the column-I with column-II and choose the correct option.
| Column-I | Column-II |
| A. P | I. Found in some amino acids |
| B. S | II. All phosphorylation reaction |
| C. I | III. Not important for plants |
| D. Mn | IV. Required for photolysis of water |
(a) A – II, B – I, C – III, D – IV
(b) A – I, B – II, C – III, D – IV
(c) A – I, B – III, C – IV, D – II
(d) A – II, B – III, C – I, D – IV
Answer
A
Question. Which of the following is the mismatched pair?
| Mineral elements | Form that is absorbed by plant |
| (a) Nitrogen | NO3– |
| (b) Phosphorus | H2PO4– |
| (c) Sulphur | H2SO4 |
| (d) Iron | Fe3+ |
Answer
C
Question. Find the incorrectly matched pair.
(a) Rhizobium → Alfalfa
(b) Frankia → Alnus
(c) Rhodospirillum → Aerobic
(d) Bacillus → Free -living
Answer
C