Objective Biology for NEET

Rajiv Vijay

Chapter 12

Mineral Nutrition - all with Video Answers

Educators

Chapter Questions

Problem 1

In 1860, for the first time demonstrated the concept of hydroponics.
(a) Van Neil
(b) Von Sachs
(c) Arnon
(d) Lundergarth

Narayan Hari

Narayan Hari

Numerade Educator

Problem 2

Hydroponics require
(a) Purified water
(b) Impure water
(c) Mineral nutrient salt
(d) Both (a) and (c)

Narayan Hari

Numerade Educator

Problem 3

Hydroponic is a successfully cmployed technique for the commercial production of vegetables like
(a) Tomato
(b) Seedless cucumber
(c) Lettuce
(d) All of these

Narayan Hari

Numerade Educator

Problem 4

Find the true/false statement from the following:
(a) Only 50 elements are found in different plants.
(b) In hydroponics, the nutrient solution must be adequately aerated to obtain optimum growth.
(c) Some plant species accumulate selenium.
(d) By hydroponics essential elements were identified and their deficiency symptoms were also discovered.
(a) FTTT
(b) FFTT
(c) FTFT
(d) FFFT

Anitha Mary

Numerade Educator

Problem 5

Which one of the following is Arnon's criterion for the essentiality of element?
(a) In the absence of element, plants do not complete their life cycle or set the seeds.
(b) Deficiency of element cannot be met by supplying other element.
(c) The element must be directly involved in the metabolism of the plant.

Anitha Mary

Numerade Educator

Problem 6

What indicates $\mathrm{A}$ to $\mathrm{D}$ in the given figure?
(a) A: Cotton, B: Aerating tube, C: Funnel for adding water and nutrients, D: Nutrient solution
(b) A: Funnel for adding water and nutrients, B: Aerating tube, C: Cotton, D: Nutrient solution
(c) A: Nutrient solution, B: Cotton, C: Funnel for adding water and solution, D: Aerating tube
(d) A: Cotton, B: Aerating tube, C: Nutrient solution, D: Funnel for adding water and nutrients

Rehana Riaz

Numerade Educator

Problem 7

By some techniques
(a) $10^{-12} \mathrm{gm} / \mathrm{ml}$
(b) $10^{-15} \mathrm{gm} / \mathrm{ml}$
(c) $10^{-10} \mathrm{gm} / \mathrm{ml}$
(d) $10^{-8} \mathrm{gm} / \mathrm{ml}$

Narayan Hari

Numerade Educator

Problem 9

The following are macronutrients except
(a) $\mathrm{N}$
(b) $\overline{\mathrm{P}}$
(c) $\mathrm{S}$
(d) $\mathrm{Mn}$

Narayan Hari

Numerade Educator

Problem 10

The following are micronutrients except
(a) $\mathrm{Zn}$
(b) $\mathrm{B}$
(c) Mo
(d) $\mathrm{Ca}$

Narayan Hari

Numerade Educator

Problem 11

Select the total number of macronutrients from the following:
$\mathrm{C}, \mathrm{H}, \mathrm{O}, \mathrm{N}, \mathrm{P}, \mathrm{S}, \mathrm{Cu}, \mathrm{Zn}, \mathrm{B}, \mathrm{Cl}, \mathrm{Mn}, \mathrm{Ni}, \mathrm{K}, \mathrm{Ca}, \mathrm{Mg}, \mathrm{Mo}$
(a) 8
(b) 9
(c) 10
(d) 11

Anitha Mary

Numerade Educator

Problem 12

$\mathrm{C}, \mathrm{H}, \mathrm{O}$ is mainly obtained from
(a) Soil and $\mathrm{H}_{2} \mathrm{O}$
(b) Soil only
(c) $\mathrm{H}_{2} \mathrm{O}$ and $\mathrm{CO}_{2}$
(d) $\mathrm{CO}_{2}$ only

Narayan Hari

Numerade Educator

Problem 13

What is the number of the absolutely essential elements for growth and metabolism of all plants?
(a) 14
(b) 17
(c) 21
(d) 23

Narayan Hari

Numerade Educator

Problem 14

Some beneficial elements required by higher plants are
(a) $\mathrm{Na}, \mathrm{Si}, \mathrm{Co}, \mathrm{Se}$
(b) $\mathrm{Na}, \mathrm{Si}$, Os, $\mathrm{I}$
(c) $\mathrm{Na}, \mathrm{Co}, \mathrm{Ir}, \mathrm{At}$
(d) $\mathrm{Na}, \mathrm{Si}, \mathrm{W}, \mathrm{Ag}$

Narayan Hari

Numerade Educator

Problem 15

The structural elements of cell are
(a) $\mathrm{C}, \mathrm{H}, \mathrm{O}, \mathrm{N}$
(b) $\mathrm{N}, \mathrm{P}, \mathrm{K}, \mathrm{Ca}$
(c) $\mathrm{Ca}, \mathrm{Mg}, \mathrm{K}$
(d) $\mathrm{Ca}, \mathrm{Mg}, \mathrm{Fe}, \mathrm{O}$

Narayan Hari

Numerade Educator

Problem 16

Select the correct match:
Column I Column II
A. $\mathrm{Mg}^{2+}$
1. Chlorophyll
B. $\mathrm{P}$
2. ATP
C. $\mathrm{Zn}$
3. Alcohol dehydrogenase $\begin{array}{lll}\text { D. Mo } & - & \text { 4. Nitrogenase }\end{array}$
(a) $\mathrm{A}-2, \mathrm{~B}-1, \mathrm{C}-3, \mathrm{D}-4$
(b) $\mathrm{A}-1, \mathrm{~B}-2, \mathrm{C}-3, \mathrm{D}-4$
(c) $\mathrm{A}-4, \mathrm{~B}-1, \mathrm{C}-2, \mathrm{D}-3$
(d) $\mathrm{A}-4, \mathrm{~B}-3, \mathrm{C}-2, \mathrm{D}-1$

Paras Aggarwal

Numerade Educator

Problem 17

Which element plays an important role in opening and closing of stomata?
(a) $\mathrm{P}$
(b) $\mathrm{N}$
(c) $\mathrm{K}$
(d) $\mathrm{Ca}$

Narayan Hari

Numerade Educator

Problem 18

In how many broad categories can the essential elements be grouped on the basis of their diverse function?
(a) 1
(b) 2
(c) 3
(d) 4

Narayan Hari

Numerade Educator

Problem 19

Which essential nutrient in plant is required in greatest amount?
(a) $\mathrm{N}$
(b) $\mathrm{P}$
(c) $\mathrm{K}$
(d) $\mathrm{Ca}$

Narayan Hari

Numerade Educator

Problem 20

Nitrogen is one of the major constituents of
(a) Protein
(b) Nucleic acid
(c) Vitamins and hormones
(d) All of these

Narayan Hari

Numerade Educator

Problem 21

Select the incorrect match:
Element Absorbable form (a) Nitrogen $-\mathrm{NO}_{3}^{-}, \mathrm{NO}_{2}^{-}, \mathrm{NH}_{4}^{+}$,
(b) Sulphur $\mathrm{S}^{2-}$
(c) Iron $\mathrm{Fe}^{3+}$
(d) Boron $-\quad \mathrm{BO}_{3}^{3-}, \mathrm{B}_{4} \mathrm{O}_{7}^{2-}$

Anitha Mary

Numerade Educator

Problem 22

Which of the following is required for all phosphorylation reaction?
(a) $\mathrm{N}$
(b) $\mathrm{Ca}$
(c) $\mathrm{P}$
(d) $\mathrm{K}$

Anitha Mary

Numerade Educator

Problem 23

Which of the following is the function of potassium?
(1) Cation-anion balance in cell
(2) Involved in protein synthesis
(3) Activation of enzyme
(4) Opening and closing of stomata
(5) Maintenance of turgidity of cell
(a) All except 1
(b) All except 1 and 2
(c) All except 3
(d) All of these

Anitha Mary

Numerade Educator

Problem 24

Which element is involved in the formation of mitotic spindle?
(a) $\mathrm{N}$
(b) $\mathrm{P}$
(c) $\mathrm{Ca}$
(d) $\mathrm{K}$

Narayan Hari

Numerade Educator

Problem 25

The following functions are related to which clement mainly?
(1) Activated enzyme of photosynthesis and respiration.
(2) Involved in synthesis of DNA and RNA.
(3) Helps to maintain the structure of ribosome.
(a) $\mathrm{Ca}$
(b) $\mathrm{Mg}$
(c) $\mathrm{S}$
(d) $\mathrm{Fc}$

Narayan Hari

Numerade Educator

Problem 27

Which of the following is true about iron?
(a) It is a constituent of ferredoxin and cytochrome.
(b) It activates catalase enzyme.
(c) It is essential for the formation of chlorophyll.
(d) All the above

Anitha Mary

Numerade Educator

Problem 28

Which element is related to the splitting of water in light reaction of photosynthesis?
(a) $\mathrm{Mn}$
(b) Mo
(c) $\overrightarrow{\mathrm{Fe}}$
(d) $\mathrm{B}$

Narayan Hari

Numerade Educator

Problem 32

The element involved in splitting of water is
(a) $\mathrm{Mn}$
(b) $\mathrm{Ca}$
(c) $\mathrm{Cl}$
(d) All of these

Narayan Hari

Numerade Educator

Problem 33

Mn induced the deficiency of
(a) $\mathrm{Fe}$
(b) $\mathrm{Mg}$
(c) $\mathrm{Ca}$
(d) All of these

Narayan Hari

Numerade Educator

Problem 34

Which one of the following statement is incorrect?
(a) The first phase of mineral absorption is the rapid uptake of ions into free or outer space.
(b) In the second phase of uptake, the ions are slowly taken into inner space, the symplast of the cells.
(c) The movement of ion is usually called flux.
(d) The inward movement of ion outflux and outword movement of ion is called influx.

Anitha Mary

Numerade Educator

Problem 35

Ascent of mineral is mainly due to
(a) Xylem
(b) Phloem
(c) Pericycle
(d) Cortex

Narayan Hari

Numerade Educator

Problem 37

The function of soil is to
(a) Supply mineral to plants
(b) Harbour the nitrogen fixing bacteria
(c) Hold water and supply air to root
(d) All of these

Narayan Hari

Numerade Educator

Problem 38

Fertilizer contains
(a) Micronutrient
(b) Macronutrient
(c) Both (a) and (b)
(d) None of these

Narayan Hari

Numerade Educator

Problem 39

Nitrogen is limiting mineral for
(a) Natural ecosystem
(b) Agro-ecosystem
(c) Both (a) and (b)
(d) None of these

Narayan Hari

Numerade Educator

Problem 40

Conversion of $\mathrm{N}_{2}$ to ammonia is known as
(a) Nitrogen fixation
(b) Nitrification
(c) Denitrification
(d) Ammonification

Narayan Hari

Numerade Educator

Problem 41

Lightening and UV radiation can cause a reaction between nitrogen and oxygen and produces
(a) $\mathrm{NO}$
(b) $\mathrm{NO}$,
(c) $\mathrm{N}_{2} \mathrm{O}$
(d) All of these

Narayan Hari

Numerade Educator

Problem 42

Decomposition of organic nitrogen of dead plants and animals into ammonia is called
(a) Nitrogen fixation
(b) Nitrification
(c) Denitrification
(d) Ammonification

Narayan Hari

Numerade Educator

Problem 43

What happens to ammonia formed by ammonification?
(a) Some gets volatilized
(b) Most of it gets converted into nitrate by soil bacteria
(c) Some will undergo biological nitrogen fixation
(d) Both (a) and (b)

Narayan Hari

Numerade Educator

Problem 44

$2 \mathrm{NH}_{3}+3 \mathrm{O}_{2} \rightarrow 2 \mathrm{NO}_{2}^{-}+2 \mathrm{H}^{+}+2 \mathrm{H}_{2} \mathrm{O}$
The reaction can be caused by
(1) Nitrosomonas
(2) Nitrococcus
(3) Nitrobacter
(4) Pseudomonas
(5) Thiobacillus
(a) 1 and 5 only
(b) 1 and 2 only
(c) 4 and 5 only
(d) Only 3

Anitha Mary

Numerade Educator

Problem 45

$2 \mathrm{NO}_{2}^{-}+\mathrm{O}_{2} \rightarrow 2 \mathrm{NO}_{3}^{-}$
This process of nitrification is done by bacteria.
(a) Pseudomonas
(b) Thiobacillus
(c) Nitrobacter
(d) Nitrococcus

Narayan Hari

Numerade Educator

Problem 46

Nitrifying bacteria are
(a) Photoautotroph
(b) Chemoautotroph
(c) Heterotrophy
(d) All of these

Anitha Mary

Numerade Educator

Problem 47

Nitrate present in the soil is also reduced to nitrogen by the process of denitrification it is carricd out by
(a) Pseudomonas
(b) Thiobacillus
(c) Rhizobium
(d) Both (a) and (b)

Anitha Mary

Numerade Educator

Problem 48

Reduction of nitrogen to ammonia by living organism is called
(a) Nitrification
(b) Denitrification
(c) Biological nitrogen fixation
(d) Ammonification

Narayan Hari

Numerade Educator

Problem 49

$\mathrm{N} \equiv \mathrm{N} \rightarrow \mathrm{NH}_{3}$
This reaction is catalyzed by the enzyme
(a) Isomerase
(b) Nitrogenase
(c) Carbonic anhydrase
(d) Higase

Narayan Hari

Numerade Educator

Problem 50

Frankia produced nitrogen by fixing nodule on
(a) Lentils
(b) Garden pea
(c) Alnus
(d) Broad bean

Anitha Mary

Numerade Educator

Problem 51

Which of the following statement is incorrect?
(a) Rhizobium and frankia are free living bacteria of soil.
(b) Rhizobium is rod shaped (Bacillus).
(c) Root nodule of pulse are pink due to the presence of leg-haemoglobin.
(d) Rhizobium and frankia can fix nitrogen as free living bacteria

Anitha Mary

Numerade Educator

Problem 52

Leg-haemoglobin means
(a) Low grade haemoglobin
(b) Luminous haemoglobin
(c) Leguminous haemoglobin
(d) Low level haemoglobin

Anitha Mary

Numerade Educator

Problem 53

The sequential stage for principal stages of nodule formation are
(1) Rhizobia multiply and colonies the surrounding roots.
(2) Rhizobia attached to epidermal and root hair cells.
(3) Root hair curl and bacteria invades root hair.
(4) Initiation of nodule formation in cortex.
(5) Infection thread is produced carrying bacteria to cortex.
(6) Bacteria released from thread into cells and causes their differentiation in specialized nitrogen fixing cells.
(7) Nodule formed is establish, a direct vascular connection with the host for exchange of nutrient.
(a) $\mathrm{I} \rightarrow \mathrm{VII} \rightarrow \mathrm{II} \rightarrow \mathrm{VI} \rightarrow \mathrm{III} \rightarrow \mathrm{V} \rightarrow \mathrm{IV}$
(b) II $\rightarrow \mathrm{III} \rightarrow \mathrm{IV} \rightarrow \mathrm{I} \rightarrow \mathrm{VII} \rightarrow \mathrm{V} \rightarrow \mathrm{VI}$
(c) VII $\rightarrow \mathrm{VI} \rightarrow \mathrm{IV} \rightarrow \mathrm{I} \rightarrow \mathrm{III} \rightarrow \mathrm{V} \rightarrow \mathrm{II}$
(d) $\mathrm{I} \rightarrow \mathrm{II} \rightarrow \mathrm{III} \rightarrow \mathrm{V} \rightarrow \mathrm{IV} \rightarrow \mathrm{VI} \rightarrow \mathrm{VII}$

Paras Aggarwal

Numerade Educator

Problem 54

Root nodule of leguminous plant contains
(a) Nitrogenase
(b) Leg-haemoglobin
(c) Both (a) and (b)
(d) None of these

Anitha Mary

Numerade Educator

Problem 55

The enzyme nitrogenase is
(a) Mo-Fe protein
(b) Mo-Mn protein
(c) Mn-Fe protein
(d) Cu-Fe protein

Narayan Hari

Numerade Educator

Problem 56

Which cells are divided for nodule formation?
(a) Inner cortex
(b) Pericycle
(c) Endodermis
(d) Both (a) and (b)

Narayan Hari

Numerade Educator

Problem 57

For the production of 2 mol. $\mathrm{NH}_{3}$ how much ATP is required in biological nitrogen fixation reaction (i. e., $\mathrm{N}_{2} \rightarrow 2 \mathrm{NH}_{3}$ ?
(a) 4
(b) 8
(c) 16
(d) 32

Anitha Mary

Numerade Educator

Problem 58

Nitrogenase requires $\quad$ condition for its activity.
(a) Aerobic
(b) Anaerobic
(c) Ozonized environment
(d) $\mathrm{CO}_{2}$

Anitha Mary

Numerade Educator

Problem 59

Which of the following is incorrect about nitrogen fixation in nodulc?
(a) It is a high energy process.
(b) Leg-haemoglobin acts as oxygen scavenger.
(c) $\mathrm{Mg}$ is requircd as a cofactor for nitrogenase cnzyme.
(d) This process uses atmospheric nitrogen but not atmospheric hydrogen directly.

Anitha Mary

Numerade Educator

Problem 60

Fats of $\mathrm{NH}_{3}$ formed during biological nitrogen fixation is
(a) $\mathrm{NH}_{3}$ protonated to form
(b) The $\mathrm{NH}_{4}^{+}$ ion formed is used for reductive amination
(c) Glutamic acid is formed under reductive amination to undergo transamination.
(d) All of these

Anitha Mary

Numerade Educator

Problem 61

Which is the main amino acid that is used for transamination?
(a) Tyrosine
(b) Proline
(c) Glutamic acid
(d) Alanine

Anitha Mary

Numerade Educator

Problem 62

(i) $\alpha$ -ketoglutaric acid $+\mathrm{NH}_{4}^{+}+$ NADPH $\stackrel{\mathrm{A}}{\longrightarrow}$ glumate $+\mathrm{H}_{2} \mathrm{O}+$ NADP
(ii)
What is $\mathrm{A}$ and $\mathrm{B}$ put on arrow?
(a) A-Glutamate dehydrogenase, B-Transaminase
(b) A-Transaminase, B-Glutamate dehydrogenase
(c) A-Nitrogenase, B-Transaminase
(d) A-Glumate aminase, B-Dehydrogenase

Anitha Mary

Numerade Educator

Problem 63

Select the incorrect statement from the following:
(a) The amides - aspargine and glutamine are found in plants as structural part of protein.
(b) Amides contain less nitrogen than amino acid.
(c) $\mathrm{NH}_{2}$ radicle is transported to other parts via xylem.
(d) In soyabean, the fixed nitrogen is transported as ureides.

Anitha Mary

Numerade Educator

Problem 64

Ureides have
(a) High $\mathrm{N} / \mathrm{C}$ ratio
(b) Low N/C ratio
(c) Any of these
(d) None of these

Anitha Mary

Numerade Educator

Problem 65

Which of the following is incorrect about $\mathrm{NH}_{4}^{+}$ ion?
(a) It is formed by the protonation of $\mathrm{NH}_{3}$.
(b) Less toxic so it can be accumulated in plants.
(c) It is used to synthesize amino acid in plants.
(d) All the above

Anitha Mary

Numerade Educator

Problem 66

Select the order of true and false statements:
(a) Boron deficiency leads to stout axis.
(b) Every mineral element that is present in a cell is needed by the cell.
(c) Nitrogen as a nutrient element is highly immobile in the plants.
(d) It is very easy to establish the essentiality of micronutrients because they are required only in trace quantities.
(a) FFFT
(b) FFTT
(c) TTFF
(d) TTTF

Anitha Mary

Numerade Educator

Problem 67

What is critical concentration?
(a) Concentration of essential element which causes flowering in plants.
(b) Concentration of essential element which is easily absorbed by plants.
(c) Concentration of essential element below which the plant growth is retarded.
(d) All the above

Narayan Hari

Numerade Educator

Problem 68

Select the order of true and false statements:
(1) Morphological changes which are indicative of certain element deficiencies are known as deficiency symptoms.
(2) For actively mobilized element, the deficiency symptoms first appear in older tissues.
(3) When element is relatively immobile, the deficiency symptom first appear in younger tissue.
(4) Mineral nutrition study of plant have great significance to agriculture and horticulture.
(a) FFFT
(b) FFTT
(c) TTFF
(d) TTTT

Anitha Mary

Numerade Educator

Problem 69

Deficiency symptom of $\mathrm{N}, \mathrm{K}$ and $\mathrm{Mg}$ appears in
(a) Young leaf
(b) Meristematic tissue
(c) Young stem
(d) Senescent leaves

Anitha Mary

Numerade Educator

Problem 70

Which elements are relatively immobilized?
(a) $\mathrm{N}$ and $\mathrm{P}$
(b) $\mathrm{K}$ and $\mathrm{Mg}$
(c) S and $\mathrm{Ca}$
(d) $\mathrm{N}$ and $\mathrm{Mg}$

Anitha Mary

Numerade Educator

Problem 71

Deficiency symptom of plants includes
(a) Chlorosis and necrosis
(b) Stunted plant growth and inhibition of cell division
(c) Premature fall of leaves and buds
(d) All of these

Anitha Mary

Numerade Educator

Problem 72

Chlorosis is caused due to the deficiency of
(a) $\mathrm{N}, \mathrm{K}, \mathrm{Mg}$
(b) $\mathrm{S}, \mathrm{Fe}, \mathrm{Mn}$
(c) $\mathrm{Zn}$ and $\mathrm{Me}$
(d) All of these

Narayan Hari

Numerade Educator

Problem 73

Necrosis particularly leaf tissue is caused by
(a) $\mathrm{Ca}$ and $\mathrm{Mg}$
(b) $\mathrm{Cu}$
(c) $\mathrm{K}$
(d) All of these

Anitha Mary

Numerade Educator

Problem 74

Low level of $\mathrm{N}, \mathrm{K}, \mathrm{S}, \mathrm{Mo}$ is caused by
(a) Chlorosis
(b) Inhibition of cell division
(c) Both (a) and (b)
(d) None of these

Narayan Hari

Numerade Educator

Problem 75

Delay in flowering occurs due to the deficiency of
(a) $\mathrm{N}$
(b) $\mathrm{S}$
(c) Mo
(d) All of these

Narayan Hari

Numerade Educator

Problem 76

The technique of growing plants without soil in nutrient solutions is called
(a) Parthenogenesis
(b) Hydroponics
(c) Aquaculture
(d) Tissue culture

Anitha Mary

Numerade Educator

Problem 77

Which of the following element is not essential for plants?
(a) Iron
(b) Zinc
(c) Potassium
(d) Iodine

Narayan Hari

Numerade Educator

Problem 78

Inorganic nutrients are present in soil in the form of
(a) Molecules
(b) Atoms
(c) Electrically charged ions
(d) Parasite

Narayan Hari

Numerade Educator

Problem 79

Tracer elements are
(a) Microelements
(b) Macroclements
(c) Radioisotopes
(d) Vitamins

Narayan Hari

Numerade Educator

Problem 80

The death of stem and root tips occur due to the deficiency of
(a) Phosphorus
(b) Calcium
(c) Nitrogcn
(d) Carbon

Narayan Hari

Numerade Educator

Problem 81

The plants requiring two metallic compounds (mincrals) for chlorophyll synthesis arc
(a) $\mathrm{Fe}$ and $\mathrm{Ca}$
(b) $\mathrm{Fe}$ and $\mathrm{Mg}$
(c) Cu and $\mathrm{Ca}$
(d) $\mathrm{Ca}$ and $\mathrm{K}$

Narayan Hari

Numerade Educator

Problem 82

Calcium can affect the
(a) Permeability of plasma membrane
(b) Hydration of colloids
(c) Translocation of carbohydrates and amino acids
(d) Development of root

Narayan Hari

Numerade Educator

Problem 83

Which of the following is not absorbed through soil?
(a) Carbon
(b) Nitrogen
(c) Potassium
(d) All of these

Narayan Hari

Numerade Educator

Problem 84

Which of the following is considered to be the elements between macronutrients and micronutrients?
(a) Iron
(b) Nitrogen
(c) Phosphorus
(d) Manganese

Narayan Hari

Numerade Educator

Problem 85

The major role of phosphorus in plant metabolism is
(a) To generate metabolic energy
(b) To evolve oxygen during photosynthesis
(c) To evolve carbon dioxide during respiration
(d) To create anaerobic conditions

Narayan Hari

Numerade Educator

Problem 86

Phosphorus is a structural element in
(a) Fat
(b) Starch
(c) Nucleotide
(d) Carbohydrate

Narayan Hari

Numerade Educator

Problem 87

The most abundent element present in the plants is
(a) Manganese
(b) Iron
(c) Carbon
(d) Nitrogen

Narayan Hari

Numerade Educator

Problem 88

Photosynthetic photolysis of water takes place in the presence of
(a) $\mathrm{Mn}$
(b) $\mathrm{Cl}$
(c) Both (a) and (b)
(d) None of these

Narayan Hari

Numerade Educator

Problem 89

Copper is the component of
(a) Cytochrome oxidase
(b) Plastocyanin
(c) Both (a) and (b)
(d) None of these

Anitha Mary

Numerade Educator

Problem 90

Which of the following element is a component of ferredoxin?
(a) $\mathrm{Cu}$
(b) $\mathrm{Mn}$
(c) $\mathrm{Zn}$
(d) $\mathrm{Fe}$

Narayan Hari

Numerade Educator

Problem 91

Function of zinc is
(a) Synthesis of chlorophyll
(b) Biosynthesis of IAA
(c) Closing of stomata
(d) Oxidation of carbohydrate

Narayan Hari

Numerade Educator

Problem 92

The process by which mincrals are absorbed is
(a) Active absorption
(b) Passive absorption
(c) Both (a) and (b)
(d) None of these

Narayan Hari

Numerade Educator

Problem 93

The active uptake of minerals by roots mainly depends on the
(a) Availability of oxygen
(b) Light
(c) Temperature
(d) Availability of carbon dioxide

Narayan Hari

Numerade Educator

Problem 94

Identify $\mathrm{A}$ to $\mathrm{D}$ in the given figure.
(a) A-Decaying biomass, B-Electrical $\mathrm{N}_{2}$ fixation, C-Plant biomass, D-Ammonification
(b) A-Plant biomass, B-Decaying biomass, C-Ammonification, D-Electrical $\mathrm{N}_{2}$ fixation
(c) A-Electrical $\mathrm{N}_{2}$ fixation, B-Ammonification, C-Decaying biomass, D-Plant biomass
(d) A-Ammonification, B-Plant biomass, C-Electrical $\mathrm{N}_{2}$ fixation, D-Decaying biomass

Narayan Hari

Numerade Educator

Problem 95

Nitrogen is a component of
(a) Protein
(b) Chlorophyll
(c) Nucleic acid
(d) All of these

Narayan Hari

Numerade Educator

Problem 96

Which one of the following can fix atmospheric nitrogen directly?
(a) Pea
(b) Brassica
(c) Castor
(d) Petunia

Narayan Hari

Numerade Educator

Problem 97

Knot like bodies known as 'nodules' are found in the roots of groundnut plant it is produced by
(a) Azospirillum
(b) Azotobacter
(c) Pseudomonas
(d) Rhizobium

Anitha Mary

Numerade Educator

Problem 98

Nitrogen fixation means
(a) $\mathrm{N}_{2}$ changes in $\mathrm{NO}_{3}^{-}$
(b) $\mathrm{N}_{2}$ changes in $\mathrm{NH}_{3}$
(c) $\mathrm{N}_{2}$ change into nitrates
(d) None of these

Narayan Hari

Numerade Educator

Problem 99

Nif genes occur in
(a) Rhizobium
(b) Aspergillus
(c) Penicillium
(d) Streptococcus

Anitha Mary

Numerade Educator

Problem 100

Identify $\mathrm{A}$ to $\mathrm{C}$ in the given figure.
(a) A-Bacteria, B-Root hair, C-Soil particles
(b) A-Root hair, B-Bacteria, C-Soil particles
(c) A-Root hair, B-Soil particles, C-Bacteria
(d) A-Soil particles, B-Bacteria, C-Root hair

Narayan Hari

Numerade Educator

Problem 101

Which of the following pigments is essential for the nitrogen fixation by leguminous plants?
(a) Anthocyanin
(b) Phycocyanin
(c) Phycoerythrin
(d) Leghaemoglobin

Anitha Mary

Numerade Educator

Problem 102

Assertion: Biological nitrogen fixation is a very high energy input process. Reason: One molecule of ammonia formation requires 8 ATP during biological nitrogen fixation.

Narayan Hari

Numerade Educator

Problem 103

Assertion: Leguminous plants are nitrogen fixers. Reason: Leguminous plants have rhizobium in their root nodules.

Anitha Mary

Numerade Educator

Problem 104

Assertion: The use of fertilizers greatly enhances the crop productivity. Reason: Irrigation is very important in increasing crop productivity.

Anitha Mary

Numerade Educator

Problem 105

Assertion: Hydroponics is uscd for solution culture. Reason: A balanced nutricnt solution contains both cssential and non-cssential clements.

Narayan Hari

Numerade Educator

Problem 106

Assertion: Nitrogen is very cssential for sustenance of lifc. Reason: Plants cannot use atmospheric nitrogen directly.

Anitha Mary

Numerade Educator

Problem 107

Assertion: The movement of ion is usually called flux. Reason: The concentration of essential elements below which the plant growth is retarded is termed as critical concentration.

Narayan Hari

Numerade Educator

Problem 108

Assertion: Iron takes part in the electron transport system of mitochondria. Reason: Iron has no role in chlorophyll synthesis.

Narayan Hari

Numerade Educator

Problem 110

Assertion: Rhizobium fixes nitrogen in the symbiotic association with root nodules of leguminous plants only. Reason: Biological nitrogen fixation is anaerobic process.

Anitha Mary

Numerade Educator

Problem 111

Assertion: Nitrogen fixing bacteria in legume root nodules survive in oxygen depleted cells of nodules. Reason: Leghaemoglobin completely removes oxygen from the nodule cells.

Anitha Mary

Numerade Educator

Problem 112

Assertion: Deficiency of sulphur causes chlorosis in plants. Reason: Sulphur is a constituent of chlorophyll, proteins and nucleic acids.

Narayan Hari

Numerade Educator

Problem 113

Assertion: $\mathrm{S}$ and $\mathrm{Ca}$ are immobile. Reason: $\mathrm{S}$ and $\mathrm{Ca}$ are part of the structural component of cell and hence it is not easily released.

Anitha Mary

Numerade Educator

Problem 114

Assertion: Boron is required for the uptake and utilization of calcium ion. Reason: Boron is not required for carbohydrate translocation.

Anitha Mary

Numerade Educator

Problem 115

Assertion: Iron is essential for the formation of chlorophyll. Reason: It activates the catalase enzyme.

Anitha Mary

Numerade Educator

Problem 116

Assertion: Calcium is a constituent of middle lamella. Reason: Calcium is required in mitotic division.

Anitha Mary

Numerade Educator

Problem 117

Assertion: Sulphur is present in two amino acids such as cysteine and methionine. Reason: Vitamin (thiamine, biotin, coenzyme-A) and ferredoxin also contains sulphur.

Anitha Mary

Numerade Educator

Problem 118

Assertion: Deficiency of nitrogen is visible first in young leaves. Reason: Nitrogen is relatively immobile.

Anitha Mary

Numerade Educator

Problem 119

Assertion: Nutritional adaptation is found in insectivorous plants. Reason: They grow in $\mathrm{N}_{2}$ deficient soil so to obtain nitrogen they eat and digest insect.

Anitha Mary

Numerade Educator

Problem 120

Assertion: Hydroponics is useful technique. Reason: Hydroponics is use for identification of essential element and their deficiency symptoms.

Narayan Hari

Numerade Educator

Problem 121

Assertion: $\mathrm{K}^{+}$ is useful for transpiration process. Reason: $\mathrm{K}^{+}$ ion help in opening and closing of stomata.

Anitha Mary

Numerade Educator

Problem 122

Assertion: Water splitting reaction in photosynthesis is essential for oxygen cvolution. Reason: $\mathrm{Mn} 2^{+}, \mathrm{Cl}, \mathrm{Ca}^{21}$ ions required for photolysis of water during photosynthesis.

Anitha Mary

Numerade Educator

Problem 123

Assertion: Sulphur is important constituent of amino acid $\mathrm{cg}$. thiamine, biotin and cocnzyme
A. Reason: Sulphur is use to form vitamin cg. cysteine and methioninc

Anitha Mary

Numerade Educator

Problem 124

Assertion: Manganese toxicity leads to deficiency of iron and magnesium. Reason: Manganese competes with iron and magnesium for uptake.

Anitha Mary

Numerade Educator

Problem 125

Assertion: Nitrogen is limiting nutrient for both natural and agricultural ecosystems. Reason: Plant competes with microbes for limited nitrogen available in soil.

Anitha Mary

Numerade Educator

Problem 126

Assertion: Absorption of mineral is inhibited by anaerobic environment. Reason: Absorption of mineral is mainly active absorption require oxygenic respiration for more energy.

Anitha Mary

Numerade Educator

Problem 127

Assertion: Calcium is essential for meristmetic cells Reason: It involve in formation of spindle apparatus.

Anitha Mary

Numerade Educator

Problem 128

Assertion: Some prokaryotes can fix atmospheric nitrogen Reason: Nitrogenase is exclusively present in some prokaryotes

Anitha Mary

Numerade Educator

Problem 129

Assertion: Rhizobium lives as aerobes under free living condition. Reason: Nitrogenase is operational under aerobic condition.

Anitha Mary

Numerade Educator