Study the cycle shown below and select the option which gives the correct word for all the four blanks A, B, C and D

An element playing important role in nitrogen fixation is

Which one of the following is not a micronutrient?

The free-living, anaerobic nitrogen-fixer is

The common nitrogen-fixer in paddy fields is

Which one of the following is not an essential mineral element for plants while the remaining three are?

The function of leghaemoglobin in the root nodules of legumes is

Nitrifying bacteria

Which one of the following elements in plants is not remobilized?

For its action, nitrogenase requires

Which one of the following is a wrong statement?

The first stable product of fixation of atmospheric nitrogen in leguminous plants is

Deficiency symptoms of nitrogen and potassium are visible first in

Mineral known to be required in large amounts for plant growth include:

During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning is prevented by:

In which of the following all three are macronutrients?

Which is essential for the growth of root tip?

Which of the following choices is not one of the three plant macronutrients included in most fertilizers?

The amount of macronutrients per kg of dry matter is –

Essential elements (17) are –

Which is a false statement regarding macronutrients?

Partial mineral element is –

Which of the following is a component of vitamin (thiamine, biotin), Acetyl CoA, cysteine, methionine and ferrerdoxin?

Which one is the major constituent of proteins, nucleic acids, vitamins and hormones

Component of nitrogenase and nitrate reductase is

Magnesium is component of

An immobile element in plants is

Main role of minor elements is to act as

Macronutrient which is component of all organic compounds but is not obtained from soil is

Which is not a criterion for essentiality of a mineral?

Which one is not a trace element / micronutrient –

Deficiency of which mineral causes deficiency of N –

I. Component of chlorophyll

II. Helps to maintain ribosome structure

III. Activator for Rubisco and Pepco

IV. Activates the enzymes of respiration and photosynthesis

V. Involved in synthesis of nucleic acids

The above roles are played by –

Minerals which maintain cation-anion balance in cells are –

Minerals associated with redox reaction are –

Which of the following elements are required for chlorophyll synthesis –

Match the column

An element which with the help of Na+ and K+, determines the solute concentration and anion-cation balance in cell is

Which element is very essential for uptake and utilization of Ca+2, membrane function, pollen germination and carbohydrate translocation via phloem –

Crop plants absorb carbon in the form of –

Plants obtain Fe in the form of –

Which mineral is required in larger amount in comparison to other micronutrients

Micronutrients are needed in very small amount because –

A mineral deficiency is likely to affect older leaves more than younger leaves if the –

Manganese is required for

Plants with zinc deficiency show reduced biosynthesis of

Grey spots of oat are due to deficiency of

The most abundant element found in plants is

Element required for biological nitrogen fixation is

Copper is activator in enzyme

About 98% of the mass of every living organism is composed of just six elements including carbon, hydrogen, nitrogen, oxygen and :

Which is essential for the growth of root tip?

Which group of three micronutrient elements is required for both photosynthetic and mitochondrial electron transport

Excess of Mn causes deficiency of –