MERIT YARD

[Mineral Nutrition - JAC 11th VVI - MERIT YARD]

Question 1 / 40Technique of growing plants in a nutrient solution is called:

A) Aeroponics

B) Hydroponics

C) Geoponics

D) Aquaponics

Question 2 / 40Which of the following is a micronutrient?

A) Nitrogen

B) Phosphorus

C) Zinc

D) Magnesium

Question 3 / 40Leg-haemoglobin is found in:

A) Root nodules of legumes

B) Human blood

C) Leaves of plants

D) Bacterial cell wall

Question 4 / 40Conversion of ammonia to nitrates is called:

A) Nitrogen fixation

B) Nitrification

C) Denitrification

D) Ammonification

Question 5 / 40Which element is a constituent of chlorophyll?

A) Iron

B) Calcium

C) Magnesium

D) Manganese

Question 6 / 40Delayed flowering is caused by the deficiency of:

A) N, S, Mo

B) Ca, Mg, Cu

C) Fe, Mn, Zn

D) P, K, Cl

Question 7 / 40Which bacteria helps in denitrification?

A) Nitrosomonas

B) Nitrobacter

C) Pseudomonas

D) Rhizobium

Question 8 / 40The enzyme responsible for nitrogen fixation is:

A) Nitrase

B) Nitrogenase

C) Amylase

D) Nitrate reductase

Question 9 / 40Death of tissues (Necrosis) is due to deficiency of:

A) Ca, Mg, Cu, K

B) N, S, Mo, Fe

C) Mn, Zn, B, Cl

D) P, Si, Na, Co

Question 10 / 40Which element is essential for the photolysis of water?

A) Zinc

B) Manganese and Chlorine

C) Boron

D) Copper

Question 11 / 40Nitrogenase enzyme is highly sensitive to:

A) Nitrogen

B) Molecular Oxygen

C) Carbon dioxide

D) Hydrogen

Question 12 / 40Mineral ion concentration that reduces the dry weight of tissues by about 10% is:

A) Critical concentration

B) Toxic concentration

C) Optimum concentration

D) Beneficial concentration

Question 13 / 40Boron is required for:

A) Pollen germination

B) Synthesis of DNA

C) Respiration

D) Protein synthesis

Question 14 / 40The main function of Leg-haemoglobin is:

A) Transport of N2

B) Oxygen scavenger

C) Provide nutrition

D) Energy production

Question 15 / 40Which of the following is a non-symbiotic (free-living) N2 fixer?

A) Rhizobium

B) Azotobacter

C) Frankia

D) Glomus

Question 16 / 40Molybdenum is a component of:

A) Nitrate reductase

B) RuBisCO

C) PEP carboxylase

D) Peroxidase

Question 17 / 40Chlorosis (loss of chlorophyll) occurs due to lack of:

A) N, K, Mg, Fe

B) Ca, B, Cu

C) P, Si, Na

D) O, H, C

Question 18 / 40How many ATP molecules are required for fixing one molecule of NH3?

A) 4

B) 8

C) 16

D) 32

Question 19 / 40The process of conversion of nitrate to nitrogen gas is:

A) Nitrification

B) Denitrification

C) Ammonification

D) Biological N2 fixation

Question 20 / 40Element involved in the opening and closing of stomata:

A) Sodium

B) Potassium

C) Calcium

D) Iron

Question 21 / 40Which of the following is a macronutrient?

A) Iron

B) Boron

C) Phosphorus

D) Molybdenum

Question 22 / 40Plants absorb nitrogen mainly in the form of:

A) Nitrite

B) Nitrate

C) Ammonia

D) Free N2

Question 23 / 40Hydroponics was first demonstrated by:

A) Julius von Sachs

B) Priestley

C) Ingenhousz

D) Hill

Question 24 / 40Which of the following is an amide used in plants?

A) Asparagine

B) Glutamic acid

C) Alanine

D) Serine

Question 25 / 40Frankia is a symbiont in the roots of:

A) Pea

B) Alnus

C) Gram

D) Wheat

Question 26 / 40Nitrosomonas and Nitrosococcus convert ammonia to:

A) Nitrite

B) Nitrate

C) Nitrogen

D) Amino acids

Question 27 / 40How many essential elements are required for plant growth?

A) 10

B) 17

C) 21

D) 30

Question 28 / 40Inhibition of cell division is due to deficiency of:

A) Ca, Mg

B) N, K, S, Mo

C) Fe, Mn

D) B, Cl

Question 29 / 40The primary nitrogen fixing bacteria in legume roots is:

A) Azotobacter

B) Rhizobium

C) Clostridium

D) Thiobacillus

Question 30 / 40Which micronutrient is required for auxin synthesis?

A) Copper

B) Zinc

C) Iron

D) Boron

Question 31 / 40Elements required in quantity more than 10 mmole/kg of dry matter:

A) Macronutrients

B) Micronutrients

C) Trace elements

D) Beneficial elements

Question 32 / 40Iron is absorbed by plants in the form of:

A) Ferric ions (Fe3+)

B) Ferrous ions (Fe2+)

C) Free metal

D) Ferrite

Question 33 / 40The total number of micro-nutrients is:

A) 9

B) 8

C) 7

D) 10

Question 34 / 40Toxicity of Manganese results in deficiency of:

A) Iron, Magnesium and Calcium

B) Nitrogen, Phosphorus and Potassium

C) Boron and Chlorine

D) Copper and Zinc

Question 35 / 40Nodules in legume roots are pink due to:

A) Chlorophyll

B) Leg-haemoglobin

C) Anthocyanin

D) Phycobilin

Question 36 / 40Passive absorption of minerals depends on:

A) Concentration gradient

B) Metabolic energy

C) ATP

D) Temperature only

Question 37 / 40Which of the following is a component of Vitamin Thiamine and Biotin?

A) Iron

B) Sulphur

C) Magnesium

D) Phosphorus

Question 38 / 40An essential element which is not a part of any organic compound:

A) Nitrogen

B) Potassium

C) Magnesium

D) Calcium

Question 39 / 40The Nif genes are found in:

A) N2 fixing bacteria

B) Legume plants

C) Virus

D) Fungi

Question 40 / 40Mineral salts are translocated through:

A) Xylem along with water

B) Phloem

C) Pith

D) Cortex