Text Book Back Questions and Answers - Chapter 12 Mineral Nutrition 11th Biology Botany Guide Samacheer Kalvi Solutions - SaraNextGen [2024-2025]

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On April 24, 2024, 11:35 AM

Mineral Nutrition
Text Book Back Questions and Answers
Question 1.
Identify correct match.

(a) 1. (iii), 2. (ii), 3. (iv), 4. (i).
(b) 1. (iii), 2. (i), 3. (iv), 4. (ii).
(c) 1. (i), 2. (iii), 3. (ii), 4. (iv).
(d) 1. (iii), 2. (iv), 3. (ii), 4. (i).
Answer:
(b) 1. (iii), 2. (i), 3. (iv), 4. (ii).
Question 2.
If a plant is provided with all mineral nutrients but, Mn concentration is increased, what will be the deficiency?
(a) Mn prevent the uptake of $\mathrm{Fe}, \mathrm{Mg}$ but not $\mathrm{Ca}$
(b) $\mathrm{Mn}$ increase the uptake of $\mathrm{Fe}, \mathrm{Mg}$ and $\mathrm{Ca}$
(c) Only increase the uptake of $\mathrm{Ca}$
(d) Prevent the uptake $\mathrm{Fe}, \mathrm{Mg}$, and $\mathrm{Ca}$
Answer:
(a) Mn prevent the uptake of $\mathrm{Fe}, \mathrm{Mg}$ but not $\mathrm{Ca}$
Question 3.
The element which is not remobilized?
(a) Phosphorus
(b) Potassium
(c) Calcium
(d) Nitrogen
Answer:
(c) Calcium

Question 4.
Match the correct combination.

(a) $A-1, B-3, C-4, D-2$
(b) $A-2, B-1, C-3, D-4$
(c) $A-4, B-3, C-1, D-2$
(d) $A-4, B-2, C-1, D-3$
Answer:
(c) $A-4, B-3, C-1, D-2$
Question 5.
Identify the correct statement:
(i) Sulphur is essential for amino acids Cystine and Methionine
(ii) Low level of $\mathrm{N}, \mathrm{K}, \mathrm{S}$ and Mo affect the cell division
(iii) Non - leguminous plant Alnus which contain bacterium Frankia
(iv) Denitrification carried out by nitrosomonas and nitrobacter.
(a) (i), (ii) are correct
(b) (i), (ii), (iii) are correct
(c) I only correct
(d) all are correct
Answer:
(b) (i), (ii), (iii) are correct
Question 6.
The nitrogen is present in the atmosphere in huge amount but higher plants fail to utilize it. Why?
Answer:
The higher plants do not have the association of bacteria or fungi, which are able to fix atmospheric nitrogen.

Question 7.
Why is that in certain plants deficiency symptoms appear first in younger parts of the plants while in others, they do so in mature organs?
Answer:
In certain plants, the deficiency symptom appears first in the younger part of the plant, due to the immobile nature of certain minerals like calcium, sulphur, iron, boron and copper.
Question 8.
Plant $A$ in a nutrient medium shows whiptail disease plant $B$ in a nutrient medium shows a little leaf disease. Identify mineral deficiency of plant $A$ and B?
Answer:
Mineral deficiency of plant $A$ and $B$ :
1. Plant $A$ is deficient of the mineral molybdenum (Mo).
2. Plant $B$ is deficient of the mineral zinc $(Z n)$.
Question 9.
Write the role of nitrogenase enzyme in nitrogen fixation?
Answer:

The role of nitrogenase enzyme in nitrogen fixation: 

Question 10.
Explain the insectivorous mode of nutrition in angiosperms?
Answer:
Plants which are growing in nitrogen deficient areas develop insectivorous habit to resolve nitrogen deficiency.
(i) Nepenthes (Pitcher plant): Pitcher is a modified leaf and contains digestive enzymes. Rim of the pitcher is provided with nectar glands and acts as an attractive lid. When insect is trapped, proteolytic enzymes will digest the
insect.

(ii) Drosera (Sundew): It consists of long club shaped tentacles which secrete sticky digestive fluid which looks like a sundew.

(iii) Utricularia (Bladder wort): Submerged plant in which leaf is modified into a bladder to collect insect in water.

(iv) Dionaea (Venus fly trap): Leaf of this plant modified into a colourful trap. Two folds of lamina consist of sensitive trigger hairs and when insects touch the hairs it will close.