Tag: mineral nutrition in plants

Quizzes (11) Questions (106)

Questions Related to mineral nutrition in plants

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

In feedback inhibition, a metabolic pathway is switched off by

  1. Lack of a substrate

  2. Accumulation of the end product

  3. A rise in temperature

  4. Competitive inhibition
Reveal answer Fill a bubble to check yourself
B Correct answer
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'. 

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

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

  1. Protein

  2. Carbohydrate

  3. Water

  4. None of these.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The cytoplasm is primarily composed of water (70-90 percent). The elements C, N, O, and H are fundamental components of water molecules and organic biomolecules dissolved within the aqueous cytoplasm.

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

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.

  1. inner, not freely, active, requires

  2. inner, freely, passive, requires

  3. outer, freely, passive, does not require

  4. outer, not freely, active, requires.
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.

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

Choose the correct option

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice botany mineral nutrition in plants deficiency diseases and symptoms deficiency symptoms macronutrients and micronutrients

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

  1. N, K, Mg

  2. S, Fe, Zn

  3. Mn, Mo, Mg

  4. All of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Chlorosis is a symptom caused by the deficiency of various essential mineral elements, including Nitrogen, Potassium, Magnesium, Sulfur, Iron, Zinc, Manganese, and Molybdenum, which are all required for chlorophyll synthesis or stability.

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

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

  1. Young, old

  2. Old, young

  3. Old, old

  4. Young, young
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Elements like N, K, and Mg are mobile in plants, so they are transported to young leaves when deficient, causing symptoms to appear first in old leaves. S and Ca are relatively immobile, so deficiency symptoms appear first in young leaves.

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

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

  1. Younger tissues

  2. Older tissues

  3. Roots

  4. Shoots
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When essential elements are mobile (radially or systemically), the plant redistributes them from older tissues to younger, actively growing tissues. Therefore, deficiency symptoms for these elements appear first in older tissues.

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

Necrosis mainly occurs by the deficiency of  

  1. Ca, Mg

  2. N, S

  3. Mn, Mo

  4. Fe, Mn
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Necrosis, or the death of plant tissue, is commonly caused by the deficiency of minerals like calcium, magnesium, copper, and potassium. Among the choices, calcium and magnesium are well-documented elements whose deficiency leads to localized tissue death.

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

Premature leaf fall is due to deficiency of 

  1. Sodium

  2. Potassium

  3. Zinc

  4. Phosphorus
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Premature leaf fall is a classic symptom of phosphorus deficiency in plants. Phosphorus is mobile within the plant, and its lack disrupts energy transfer and metabolic processes, leading to early senescence and abscission.