Role of NPK

Q. Select the correct option:
i. Potassium is absorbed as a divalent ion.
ii. Potassium is required in more quantities in meristematic tissues, buds, leaves, root tips.
iii. Potassium is found in 2 amino acids- cysteine & methionine.

1. Only i is correct
2. Only i & ii are correct
3. Only ii is correct
4. Only ii & iii are correct

Q. Which element is essential during cell division for the formation of mitotic spindle?

1. Phosphorus
2. Calcium
3. Nitrogen
4. Sodium

Q. In living organisms, nitrogen is a constituent of

1. amino acids
2. sugars
3. nucleic acids
4. chlorophyll

Q.

Calcium is an essential plant nutrient because it is a component of

1. Chlorophyll

2. ADP & ATP

3. Amino acids

4. Cell walls

Q.

Which of the following macronutrients are required for the synthesis of nucleic acids?

1. Phosphorus, magnesium, nitrogen

2. Phosphorus, potassium, nitrogen

3. Nitrogen, magnesium, calcium

4. Phosphorous, nitrogen, sulphur

Q.

Which of these physiological processes does not require potassium?

1. Opening and closing of stomata

2. Maintenance of turgidity of cells

3. Activation of enzymes

4. Cell wall formation

Q. Match the following elements with their main functions:

1. Ionic balance
2. Amino acid synthesis
3. Root development

Q. Match the following columns:
$\begin{array}{cc}Column-I& Column-II\\ \text{A. Nitrogen}& \text{1. Component of cell membrane}\\ \text{B. Phosphorus}& \text{2. Role in cell division}\\ \text{C. Potassium}& \text{3. Constituent of enzymes}\\ \text{D. Calcium}& \text{4. Involved in stomatal movement}\end{array}$

1. A - 3, B - 1, C - 4, D - 2

2. A - 1, B - 3, C - 1, D - 1

3. A - 4, B - 2, C - 3, D - 3

4. A - 2, B - 4, C - 2, D - 2

Q. The element responsible for opening and closing of stomata is

1. boron
2. potassium
3. phosphorus
4. sodium

Q. Match the following:

$\begin{array}{cccc}& \text{Column I}& & \text{Column II}\\ \text{I.}& \text{K}& \text{A}& \text{Stomatal opening}\\ \text{II.}& \text{Mo}& \text{B}& \text{Constituent of cell membrane}\\ \text{III.}& \text{P}& \text{C}& \text{Photolysis of water}\\ \text{IV.}& \text{Mn}& \text{D}& \text{Most free ion}\\ & & \text{E}& \text{Component of nitrogenase and nitrate reductase}\end{array}$

1. $\begin{array}{cccc}\text{I}& \text{II}& \text{III}& \text{IV}\\ \text{A, D}& \text{E}& \text{B}& \text{C}\end{array}$
2. $\begin{array}{cccc}\text{I}& \text{II}& \text{III}& \text{IV}\\ \text{A, E}& \text{D}& \text{C}& \text{B}\end{array}$
3. $\begin{array}{cccc}\text{I}& \text{II}& \text{III}& \text{IV}\\ \text{A, E}& \text{D}& \text{B}& \text{C}\end{array}$
4. $\begin{array}{cccc}\text{I}& \text{II}& \text{III}& \text{IV}\\ \text{A}& \text{D}& \text{C}& \text{B, E}\end{array}$

Q. The element responsible for opening and closing of stomata is

1. boron
2. potassium
3. phosphorus
4. sodium