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BIOLOGY XII > Mineral Nutrition > Flashcards

Mineral Nutrition Flashcards

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1
Q

Mineral element required by plants in greatest amount is

A

Nitrogen

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2
Q

Which plant parts require Nitrogen

A

All plant parts,particularly meristemati cells and metabolically active cells

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3
Q

Phosphorous is absorbed in the form of

A

H2PO4-

HPO4 2-

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4
Q

What is role of P?

A

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

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5
Q

Which plant parts require K abundantly?

A

meristematic tissues
bud
leaves
root tips

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6
Q

Role of K

A

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

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7
Q

Which plant parts require Ca2+?

A

meristematic and differentiating tissues

It accumulates in the older leaves

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8
Q

Role of Ca?

A

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

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9
Q

Role of Mg2+

A

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

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10
Q

Which element is a constituent of ring structure of chlorophyll?

A

Mg2+

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11
Q

Amino acids containing sulphur

A

methionine and cysteine

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12
Q

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

A

Sulphur

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13
Q

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

A

Fe

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14
Q

Catalase enzyme is activated by?

A

Fe

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15
Q

Element essential for chlorophyll formation

A

Fe

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16
Q

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

A

Mn/Cl

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17
Q

Zn role

A

activates carboxylases

req. for auxin synthesis

18
Q

Cu role

A

Req. for overall metabolism in plants

involved in redox rxns

19
Q

Boron role

A 
Req. for uptake and utilization of Ca2+
membrane functioning
pollen germination
carbohydrate translocation
cell differentiation and elongation
20
Q

Molybdenum is a component of?

A

NITROGENASE and NITRATE REDUCTASE both of which participate in nitrogen metabolism

21
Q

Cl role

A

helps maintain anion-cation balance and

determine solute conc.

22
Q

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

A

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

eg.N,K,Mg,P

23
Q

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

A

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

eg.S,Ca

24
Q

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

A

Loss of chlorophyll leading to yellowing in leaves is chlorosis

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

25
Q

What is necrosis and what is its cause?

A

death of tissue,particularly leaf tissue

Caused due to deficiency of
Ca,Mg,Cu,K

26
Q

Deficiency of N,K,S,Mo causes

A

inhibition of cell division

27
Q

Deficiency of N,S,Mo causes

A

Delay in flowering

28
Q

Excess of Mn induces deficiency of _______ elements.

A

Fe,Mg and Ca

29
Q

What is the prominent symptom of manganese toxicity ?

A

appearance of brown

spots surrounded by chlorotic veins

30
Q

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

A

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

31
Q

Manganese also inhibit ________

translocation in shoot apex

A

Ca

32
Q

Which elements are called FRAMEWORK elements?

A

C,H,O

33
Q

Which elements are called CRITICAL elements?

A

N,P,K

34
Q

What are the 2 units of nitrogenase enzyme?

A

Mo-Fe protein

Fe-S protein

35
Q

Ammonia is converted to Nitrite by

A

nitrosomonas

nitrococcus

36
Q

Nitrites are converted to nitrate by

A

Nitrobacter

nitrocystis

37
Q

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

A

Pseudomonas

Thiobacillus

38
Q

Rhizobium has relationship with roots of

A 
Alfalfa
sweet clover
sweet pea
lentils
garden pea
broad bean
clover beans
39
Q

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

A

soyabean

40
Q

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

A

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

BIOLOGY XII (18 decks)

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