Criteria for Essentiality

Q.

Give examples of 3 plants that have

1. Spiny fruits
2. Spiny stem
3. Red flower
4. Yellow flowers
5. Leaves that close at night
6. Fruits have a single seed
7. Fruits have many seeds

Q.

‘All elements that are present in a plant need not be essential to its survival’.
Comment.

Q.

How does arsenic inhibit cellular respiration?

Q.

Which of the following is/are the criteria required for the essentiality of an element in plants?

1. The element must be directly involved in the metabolism of the plant
2. The requirement of the element is specific and cannot be replaced by another element
3. The element must be absolutely essential for growth and reproduction
4. All of these

Q. Which of the following statements is correct with respect to the criteria for essentiality of an element?

(I) The element must be absolutely necessary for supporting normal growth and reproduction.

(II) Elements cannot be replaced by another element during its deficiency.

(III) The element must be directly involved in the metabolism of the plant.

(IV) Role of essential elements and their deficiency symptoms can be studied.

(V) The requirement of the element must be specific and not replaceable by another element.

1. (II) (III) (IV)
2. (I) (II) (V)
3. (I) (III)
4. (I) (II) (III) (IV)

Q. Which of the following statements is incorrect with regards to criteria for essentiality of minerals in plants?

1. Element must be absolutely necessary for plant growth and reproduction
2. Deficiency of any one element can be met by supplying some other element.
3. Elements plays a direct role in metabolism of plants
4. No other element can perform the function of another element.

Q.

Name the sources and the nutrients supplied by them to the plants.

Q.

Is NAD+ a product or substrate?

Q.

What role does cytochrome C oxidase play in aerobic respiration?

Q.

Elaborate Sunlight, Soil, and Water as Basic Resources For Agriculture.

Q.

Name the elements that are important for plants.

Q.

Each mineral element found in a cell is required by the cell.

1. True
2. False

Q.

Name the following:
Two seeds containing only one cotyledon: ______________.

Q.

Which metal is present in Cyt. P450?

Q. Match the columns and select the correct option.

	Column I		Column II
a.	Calcium	(i)	Required for formation of chlorophyll
b.	Boron	(ii)	Found in middle lamella
c.	Molybdenum	(iii)	Uptake and utilisation of Ca${}^{++}$
d.	Iron	(iv)	Component of nitrogenase

1. a(ii), b(iii), c(iv), d(i)
2. a(iv), b(ii), c(iii), d(i)
3. a(iii), b(iv), c(ii), d(i)
4. a(i), b(ii), c(iv), d(iii)

Q.

Explain why seeds sown too deep in the soil fail to germinate.

Q.

Is Molybdenum a micronutrient for plant growth?

Q. The respiration in germinating seeds produces energy, which can be detected in the form of–

1. Water
2. Heat
3. Oxygen
4. ${\text{CO}}_2$

Q.

What do you mean by nutrient management ? What are essential nutrients? What is micro and macro nutrients in the basis of their source.

Q.

What are the symptoms of Sulfur deficiency?

Q.

Which of the following are the criteria for an essential element?

1. They should be absolutely necessary for supporting normal growth and reproduction of the plants.

2. The requirement of the element must be specific and not replaceable by another element.

3. Should be a structural component of energy-related chemical compounds

4. Must be directly involved in the metabolism of the plant.

Q. What are essential elements ? How are they classified ? Write the physiological role of essential elements.

Q.

Which two minerals are not needed by the majority of plants but needed by almost all animals?

1. Sodium and Iodine

2. Oxygen and Nitrogen

3. Carbon and Calcium

4. Sodium and Magnesium

Q.

Which of the following is a criterion required for the essentially of an element in plants?

1. The element must be directly involved in the metabolism of the plant

2. The element must be absolutely essential for growth and reproduction.

3. The requirement of the element is specific and cannot be replaced by another element.

4. All of these

Q. Mineral associated with cytochrome is

1. Cu
2. Mg
3. Fe and Cu
4. Fe and Mg

Q.

Elements that have no role to play in plants have not been found to be present in plants.

1. essential metallic elements

2. essential non-metallic elements

Q.

What are micronutrients?

Q.

Q. Which of the following statements is incorrect with regards to criteria for essentiality of minerals in plants?

1. Element must be absolutely necessary for plant growth and reproduction
2. Deficiency of any one element can be met by supplying some other element.
3. No other element can perform the function of another element.
4. Elements plays a direct role in metabolism of plants

Q. Major role of minor essential elements is to act as

1. Co-factors of enzymes
2. Constituents of hormones
3. Building blocks of important amino acids
4. Binders of cell structure