Tag: mineral nutrition in plants

Questions Related to mineral nutrition in plants

In feedback inhibition, a metabolic pathway is switched off by

botany mineral nutrition in plants mechanism of absorption mineral absorption significance of transpiration

  1. Lack of a substrate

  2. Accumulation of the end product

  3. A rise in temperature

  4. Competitive inhibition

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Correct Option: B
Explanation:

Accumulation of the end product triggers inhibition or switching off of the metabolic pathway in feedback inhibition mechanism. 

So, the correct option is 'Accumulation of the end product'. 

The main constituents of cytoplasm is C, N, O, H. These are derived from-

botany mineral nutrition in plants mechanism of absorption mineral absorption significance of transpiration

  1. Protein

  2. Carbohydrate

  3. Water

  4. None of these.

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Correct Option: C

In the initial phase of mineral ion absorption, there is a rapid uptake of ions into ______ space of cells. Ions absorbed in this phase are ______ exchangable. It is _____ uptake as it ______ the expenditure of metabolic energy.

botany mineral nutrition in plants mechanism of absorption mineral absorption significance of transpiration

  1. inner, not freely, active, requires

  2. inner, freely, passive, requires

  3. outer, freely, passive, does not require

  4. outer, not freely, active, requires.

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Correct Option: C
Explanation:

In the principal stage, an underlying fast take-up of particles into the 'free space' or 'space' of cells the apoplast, is detached.

So, the correct option is 'outer, freely, passive, does not require'.

Choose the correct option

botany mineral nutrition in plants mechanism of absorption mineral absorption significance of transpiration

  1. $E\quad +\quad S\quad \longrightarrow \quad ES\quad \longrightarrow \quad E+P\quad \longrightarrow \quad EP$

  2. E\quad +\quad S\quad \longrightarrow \quad ES\quad \longrightarrow \quad EP\quad \longrightarrow \quad E+P

  3. E\quad +\quad S\quad \longrightarrow \quad ES\quad \longrightarrow \quad EP\quad \longrightarrow \quad E+P

  4. E\quad +\quad S\quad \longrightarrow \quad ES\quad \longrightarrow \quad EP\quad \longrightarrow \quad E+P

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Correct Option: A

Chlorosis, i.e., loss of chlorophyll leading to yellowing in leaves, is caused by the deficiency of 

botany mineral nutrition in plants deficiency diseases and symptoms deficiency symptoms macronutrients and micronutrients

  1. N, K, Mg

  2. S, Fe, Zn

  3. Mn, Mo, Mg

  4. All of these

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Correct Option: D

While in N, K and Mg deficiency, chlorosis appears first in _____ leaves; in S and Ca deficiency,_____ leaves are the first to be affected.

botany mineral nutrition in plants deficiency diseases and symptoms deficiency symptoms macronutrients and micronutrients

  1. Young, old

  2. Old, young

  3. Old, old

  4. Young, young

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Correct Option: B

Deficiency symptoms of radially mobilised essential elements will first appear in _________

botany mineral nutrition in plants deficiency diseases and symptoms deficiency symptoms macronutrients and micronutrients

  1. Younger tissues

  2. Older tissues

  3. Roots

  4. Shoots

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Correct Option: B

Yellowish edges appear in leaves deficient in

botany mineral nutrition in plants deficiency diseases and symptoms deficiency symptoms macronutrients and micronutrients

  1. Potassium

  2. Calcium

  3. Magnesium

  4. Phosphorus

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Correct Option: A

Necrosis mainly occurs by the deficiency of  

botany mineral nutrition in plants deficiency diseases and symptoms deficiency symptoms macronutrients and micronutrients

  1. Ca, Mg

  2. N, S

  3. Mn, Mo

  4. Fe, Mn

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Correct Option: A

Premature leaf fall is due to deficiency of 

botany mineral nutrition in plants deficiency diseases and symptoms deficiency symptoms macronutrients and micronutrients

  1. Sodium

  2. Potassium

  3. Zinc

  4. Phosphorus

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Correct Option: D