Mineral Nutrition

Question 1

Mineral element required by plants in greatest amount is

Answer 1

Nitrogen

Question 2

Which plant parts require Nitrogen

Answer 2

All plant parts,particularly meristemati cells and metabolically active cells

Question 3

Phosphorous is absorbed in the form of

Answer 3

H2PO4-

HPO4 2-

Question 4

What is role of P?

Answer 4

constituent of cell membranes
certain proteins
all nucleotides and nucleic acids
all phosphorylation reactions

Question 5

Which plant parts require K abundantly?

Answer 5

meristematic tissues
bud
leaves
root tips

Question 6

Role of K

Answer 6

anion-cation balance
opening and closing of stomata
activation of enzymes
maintaining turgidity of cells

Question 7

Which plant parts require Ca2+?

Answer 7

meristematic and differentiating tissues

It accumulates in the older leaves

Question 8

Role of Ca?

Answer 8

formation of mitotic spindle
normal functioning of cell membranes
regulates metabolic activities

Question 9

Role of Mg2+

Answer 9

activates enzymes of respiration & photosynthesis
involved in synthesis of DNA and RNA
helps to maintain ribosome structure

Question 10

Which element is a constituent of ring structure of chlorophyll?

Answer 10

Mg2+

Question 11

Amino acids containing sulphur

Answer 11

methionine and cysteine

Question 12

Element which is a main constituent of coenzymes,Vitamins(thiamine,biotin,Coenzyme A) and ferredoxin

Answer 12

Sulphur

Question 13

Which element is required in larger amounts in comparison to other micronutrients?

Answer 13

Fe

Question 14

Catalase enzyme is activated by?

Answer 14

Fe

Question 15

Element essential for chlorophyll formation

Answer 15

Fe

Question 16

Elements required in the splitting of water to liberate oxygen in photosynthesis is?

Answer 16

Mn/Cl

Question 17

Zn role

Answer 17

activates carboxylases

req. for auxin synthesis

Question 18

Cu role

Answer 18

Req. for overall metabolism in plants

involved in redox rxns

Question 19

Boron role

Answer 19

Req. for uptake and utilization of Ca2+
membrane functioning
pollen germination
carbohydrate translocation
cell differentiation and elongation

Question 20

Molybdenum is a component of?

Answer 20

NITROGENASE and NITRATE REDUCTASE both of which participate in nitrogen metabolism

Question 21

Cl role

Answer 21

helps maintain anion-cation balance and

determine solute conc.

Question 22

Deficiency symptoms appear first in older tissues for what sort of elements?

Answer 22

For elements that are actively mobilised within the plants and exported to young developing tissues

eg.N,K,Mg,P

Question 23

Deficiency symptoms appear first in younger tissues for what sort of elements?

Answer 23

for elements that are relatively immobile and are not transported out of mature organs

eg.S,Ca

Question 24

What is Chlorosis🍃🌿🍂🍁 and what is its cause?

Answer 24

Loss of chlorophyll leading to yellowing in leaves is chlorosis

Caused due to deficiency of
N,K,Mg,S,Fe,Mn,Zn,Mo

Question 25

What is necrosis and what is its cause?

Answer 25

death of tissue,particularly leaf tissue Caused due to deficiency of Ca,Mg,Cu,K

Question 26

Deficiency of N,K,S,Mo causes

Answer 26

inhibition of cell division

Question 27

Deficiency of N,S,Mo causes

Answer 27

Delay in flowering

Question 28

Excess of Mn induces deficiency of _______ elements.

Answer 28

Fe,Mg and Ca

Question 29

What is the prominent symptom of manganese toxicity ?

Answer 29

appearance of brown | spots surrounded by chlorotic veins

Question 30

manganese competes with ___(a)____ and ___(b)___ for uptake and with ____(c)_____ for binding with enzymes

Answer 30

(a) Fe (b) Mg (c) Mg

Question 31

Manganese also inhibit ________ | translocation in shoot apex

Answer 31

Ca

Question 32

Which elements are called FRAMEWORK elements?

Answer 32

C,H,O

Question 33

Which elements are called CRITICAL elements?

Answer 33

N,P,K

Question 34

What are the 2 units of nitrogenase enzyme?

Answer 34

Mo-Fe protein | Fe-S protein

Question 35

Ammonia is converted to Nitrite by

Answer 35

nitrosomonas | nitrococcus

Question 36

Nitrites are converted to nitrate by

Answer 36

Nitrobacter | nitrocystis

Question 37

Denitrification(conversion of nitrate to N2) is carried out by

Answer 37

Pseudomonas | Thiobacillus

Question 38

Rhizobium has relationship with roots of

Answer 38

``` Alfalfa sweet clover sweet pea lentils garden pea broad bean clover beans ```

Question 39

Nodules of some plants export fixed nitrogen as UREIDES . example?

Answer 39

soyabean

Question 40

2 most important amides ________ and________- found in plants are a structural part of protein

Answer 40

2 most important amides __asparagine______ and__glutamine______- found in plants are a structural part of protein