Mineral Nutrition Class 11 Biology Important Questions

Students can read the important questions given below for Mineral Nutrition Class 11 Biology. Mineral Nutrition Class 11 Biology Important Questions Class 11 Notes and questions with solutions have been prepared based on the latest syllabus and examination guidelines issued by CBSE, NCERT and KVS. You should read all notes provided by us and Class 11 Biology Important Questions provided for all chapters to get better marks in examinations. Class 11 Biology Question Bank Class 11 is available on our website for free download in PDF.

Important Questions Mineral Nutrition Class 11 Biology

Objective Type Questions

Question. At physiological pH, for the formation of ammonium ion, Ammonia is
(a) Deprotonated
(b) Decarboxylated
(c) Carboxylated
(d) Protonated

Question. What is the fate of NH₄⁺ in plant?
(a) It is deprotonated
(b) It is reprotonated
(c) It is oxdatively aminated
(d) It is toxic to plants

Question. Cell division in root nodules is promoted by _____ secreted by plant and _____ secreted by bacteria
(a) Auxin, Cytokinin
(b) Cytokinin, Auxin
(c) Auxin, Leg–haemoglobin
(d) Nitrogenase, Leg–haemoglobin

Question. Which is not true for nitrogenase enzyme in root nodules in legumes?
(a) Synthesized by nif genes of Rhizobium
(b) Site of reduction of N₂, into NH₃
(c) It is a Mo–Fe protein
(d) Resistant to O₂ conc

Question. Which one is false?
A. Mobile elements – N,P,K,Mg,Zn,Cl
B. Immobile elements – Ca, Fe, S, Mn, B, Cu
C. Deficiency symptoms first appear in older leaves due to deficiency of P,K,N,Zn,Mg Or Cl
D. Deficiency symptoms first appear in young leaves due to deficiency of Ca, Cu, Fe, S, Mn or B
Options :
(a) All are wrong
(b) None
(c) C and D
(d) A and B

Question. Leg– haemoglobin is found in which of the following organism?
(a) Anthoceros
(b) Aulosira
(c) Nostoc
(d) Groundnut

Question. The process of conversion of NO₃NO₂ NH₃ N₂
(a) Nitrification, Nitrosomonas
(b) Denitrification, pseudomonas
(c) Nitrate assimilation, Nitrogenase
(d) Ammonification, Bacillus

Question. The translocation of inorganic solute
(a) Is equal to the rate of translocation of water
(b) Is dependent on transpiration pull
(c) Occurs through xylem vessel
(d) All

Question. During ionic flux, the uptake of ions into inner space is
(a) Passive process
(b) Active process
(c) Energy dependent
(d) Both b and c

Question. Outer space/free space includes
(a) Inter cellular spaces
(b) Cell wall
(c) Apoplast
(d) All

Question. Corn is a crop that requires a lot of nitrogen to grow properly. Farmers will often grow corn in a particular field every year, alternating it with a legume What is the purpose of this
(a) Legumes form mycorrhizal association which can convert atmospheric N₂ into a form usable by plants
(b) Legume roots contain bacteria that convert atmospheric nitrogen into a form usable by plants
(c) Legume are the only plants that can convert atmospheric nitrogen into a form usable by plants
(d) Legume deplete the soil of nitrogen, so corn is grown to replenish the nitrogen in the soil

Question. Aspargine and Glutamine are
(a) Amino acids
(b) Imino acids
(c) Amide
(d) Protein

Question. Which of the following happens to be the key organism in the nitrogen cycle?
(a) All green plants
(b) Leguminous plants
(c) Bacteria
(d) Heterotrophic plants

Question. Which of the following represents the abiological mode of adding nitrogen to the soil?
(a) Ammonification
(b) Nitrification
(c) Lightning
(d) Nodule formation

Question. Which one is false?
(a) Soil supplies minerals, harbours N₂–fixing bacteria and other microbes, holds water, supplies O₂ to root and acts as matrix that stabilises the plant
(b) Both macro and micronutrients form component of fertilizers
(c) Weathering and breaking down of rock enrich the soil with dissolved ions and inorganic salts
(d) Dentrification is not the job of bacteria pseudomonas Thiobacillus

Question. Most of the plants obtain nitrogen from the soil in the form of
(a) Nitrates and nitrites
(b) Nitrates and ammonium salt
(c) Nitrites and Ammonium salts
(d) Hyponitrites and nitrates

Question. Nitrate reductase forms
(a) N₂
(b) AAs
(c) NO₂
(d) NO₃

Question. Nodule formation is reduced in the legume roots due to deficiency of
(a) S
(b) B
(c) N
(d) S,B

Question. The fixation of nitrogen in the root nodules is an
(a) Associative symbiosis
(b) Obligatory symbiosis
(c) Non–symbiotic N₂–fixation
(d) Phyllosphere association

Question. The different steps in a nodule formation are given below
A. A matured nodule establishes a direct vascular connection with the host for exchange of nutrients
B. Root hair curls and the bacteria invade the root hair
C. Rhizobium bacteria contact a susceptile root hair, divide near it
D. The infection thread is produced carrying the bacteria and grows into the cortex of the root
E. The bacteria get modified into rod–shaped bacteroids and cause inner cortical layer and pericycle to divide to form nodule
The correct sequence is
(a) C,B,D,A,E
(b) C,B,D,E,A
(c) D,E,C,B,I
(d) I,C,E,B,D

Question. Which one of the following is correct?
(a) Azotobacter and Beijernickia are free living N₂– fixers
(b) Rhodospirillum is anaerobic N₂ Fixing bacterium
(c) Bacillus is a free living N₂ fixer
(d) All

Question. The bond in molecular nitrogen (N₂) is difficult to break, because it is a
(a) twisted configuration
(b) quadruple hydrogen bond
(c) triple covalent bond
(d) triple ionic bond

Question. Nitrogen fixation by organisms requires conditions that are
(a) Highly alkaline
(b) Anaerobic
(c) Saturated with sunlight
(d) Free of water

Question. Plants having mutualistic relations with nitrogen–fixing bacteria receive _____ from the bacteria
(a) Ammonia
(b) Amino acids
(c) Nitrite
(d) Nitrate

Question. Which one of the following is an amide involved in nitrogen assimilation by plants?
(a) Glutamine
(b) Alanine
(c) Asparagine
(d) Both (a) and (c)

Question. Reduction of one molecule of nitrogen into 2 molecules of NH₃ consumes
(a) 4 molecules of ATP
(b) 16 molecules of ATP
(c) 56 molecules of ATP
(d) 38 molecules of ATP

Question. Leg–haemoglobin is
(a) O₂ scavenger
(b) N₂ scavenger
(c) CO₂ scavenger
(d) Protein Scavenger

Question. Which one is correct summary equation for the nitrogen fixation?
(a) N₂⁺ + 8e^– + 8 ATP ––> NH₃ + H₂ + 16ADP + 16Pi
(b) N₂⁺ + 8e + 8H⁺ + 16 ATP ––> 2NH₃ + H₂ + 16ADP + 16Pi
(c) 2NH₃⁺ + 4O₂ + 2H⁺ ––> 2H₂O + 2NO₃^–
(d) 2NH₃⁺ + 3O₂ + 2NO₂^– + 2H+ + 2H₂O

Question. Which one is false about the bacteria Rhizobium and Frankia?
(a) Both are N₂– fixers
(b) Both are free living in soil but can live as symbiotic life with their respective partners.
(c) Frankia produces nodules on the roots of non leguminous plants like Alnus while Rhizobium does the same in leguminous plants
(d) None

Question. Nitrosomonas, Nitrococcus and Nitrobacter are
(a) Photoautotroph
(b) Chemoheterotrophs
(c) Chemoautotroph
(d) Decomposers

Question. Inner space consists of
(a) Cytoplasm
(b) Vacuole
(c) Apoplast, vacuole
(d) Cytoplasm and vacuole

Question. Which of the following statement is correct?
(a) Amides and ureides are the transported forms of nitrogen as they have more nitrogen
(b) Legumes of tropical origin (e.g. soyabean) transport ureides
(c) The host plant produces globin part and bacterial symbiont produces haem part of leghaemoglobin (N₂– fixing pigment)
(d) All

Question. What is the primary controlled variable from which scientists benefit in a hydroponic experiment?
(a) Sunlight
(b) Insects
(c) Size of the plant
(d) Nutrient uptake

Question. Which is a false statement regarding macronutrients?
(a) Form plant structure
(b) No role in ETS
(c) Develop osmotic potenitial
(d) Become toxic in excess

Question. Most plants continue to obtain new sources of mineral nutrients by
(a) Breaking down organic matter
(b) Growing longer roots
(c) Evolving more PS
(d) Microbes

Question. Any mineral ion conc. in tissues that reduces the dry wt. of tissue by about 10% is considered
(a) Toxic
(b) Essential minerals
(c) Micronutrients
(d) Macronutrients

Question. The moderate decrease of micronutrients causes _____ symptoms while a moderate increase causes _____
(a) Deficiency,toxicity
(b) Toxic,chlorosis
(c) Chlorotic, toxic
(d) Chlorotic, necrosis

Question. Match correctly between

Column – I	Column – II
A. Zn	I. Hexokinase, PFK
B. K	II. Most free ion
C. Cu	III. Aconitase, peroxidase, catalase
D. Fe	IV. Tyrosinase
E. Mg	V. Decarboxylase and alcohol dehydrogenase

Options :
(a) A – V, B – II, C – IV, D – III, E – I
(b) A – I, B – II, C – III, D – IV, E – V
(c) A – V, B – IV, C – III, D – II, E – I
(D) A – II, B – V, C – III, D – IV, E – I