Tag: essential and non-essential mineral elements

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Questions Related to essential and non-essential mineral elements

Multiple choice biology mineral nutrition in plants nutrients and nutrition essential and non-essential mineral elements transport in the xylem of plants

Hydroponics or soilless culture helps in knowing _______________.

  1. Essentiality of an element

  2. Deficiency symptoms caused by an element

  3. Toxicity caused by an element

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

Hydroponics or soilless culture helps to know the essentiality of mineral elements, deficiency symptoms developed due to non-availability of particular nutrient, toxicity to plant when element is present in excess, possible interaction among different elements present in plants and role of essential element in the metabolism of plant.

Multiple choice biology mineral nutrition in plants nutrients and nutrition essential and non-essential mineral elements transport in the xylem of plants

The technique of growing plants in a nutrient solution, in complete absence of soil is called as ___________.

  1. Aeroponics

  2. Water culture

  3. Hydroponics

  4. Soil culture
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cultivation of plants by placing the roots in the nutrient solution (in complete absence of soil) is called hydroponics. It is necessary to aerate the solution to provide roots with adequate oxygen supply. The result obtained from soil-less culture may then be used to determine deficiencies under field conditions.

Multiple choice biology mineral nutrition in plants nutrients and nutrition essential and non-essential mineral elements transport in the xylem of plants

Micronutrients are present in plant tissues in concentrations less than _______ of dry matter.

  1. 1 m mole $Kg^{-1}$
  2. 10 m mole $Kg^{-1}$
  3. 0.1 m mole $Kg^{-1}$
  4. 2 m mole $Kg^{-1}$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Micronutrients are defined as essential elements required in small quantities, specifically less than 10 millimoles per kilogram of dry matter.

Multiple choice biology mineral nutrition in plants nutrients and nutrition essential and non-essential mineral elements transport in the xylem of plants

Choose the correct answer from the alternatives given.
Heart rot of beet root is caused by the deficiency of:

  1. B

  2. Fe

  3. Mg

  4. Zn
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Heart rot in beet root is a deficiency in the minor, nonmobile element Boron, $B$. It shows necrotic cross-hatching inside the leaf petiole. Young leaves turn brown and die, resulting in a rosette of small dead leaves at the top of the beet. In the fleshy root, internal and external black spots of necrotic tissue develop.

So the correct answer is "$B$".

Multiple choice biology mineral nutrition in plants nutrients and nutrition essential and non-essential mineral elements transport in the xylem of plants

Choose the correct answer from the alternatives given.
Phosphorus deficiency in plants causes.

  1. premature leaf fall

  2. purple anthocyanin pigmentation

  3. older leaves exhibit deficiency symptoms first

  4. all of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Phosphorus deficiency is a plant disorder associated with an insufficient supply of phosphorus. Darker green leaves and purplish or red pigment can indicate a deficiency in phosphorus. It is most common in lower leaves that are older. This condition is associated with the accumulation of sugars in P-deficient plants. Stems are thinner and leave acquire a leathery texture and tend to curl upwards, sometimes shedding prematurely. 

So the correct answer is "all of the above".

Multiple choice biology mineral nutrition in plants nutrients and nutrition essential and non-essential mineral elements transport in the xylem of plants

Minerals salts which are absorbed by the root from soil are in the form of

  1. Very dilute solution

  2. Dilute solution

  3. Concentrated solution

  4. Very concentrated solution
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Soil solution is very dilute $10^{-3}M$. It is in equilibrium with minerals adsorbed over colloidal particle.

Multiple choice biology mineral nutrition in plants nutrients and nutrition essential and non-essential mineral elements transport in the xylem of plants

Which statement is wrong

  1. Plant take very little amount of minerals element from soil

  2. Plant absorb one thing at a time either water or minerals salt

  3. Root hair absorb water and minerals together

  4. Minerals absorption primarily takes place by active method
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Plants absorb water and mineral salts simultaneously through root hairs, not sequentially. The statement that plants absorb one thing at a time is incorrect because absorption of water and minerals occurs concurrently through the same root tissues. Mineral absorption does primarily occur through active transport methods.

Multiple choice biology mineral nutrition in plants nutrients and nutrition essential and non-essential mineral elements transport in the xylem of plants

Enzyme catalysed reactions can be inhibited by

  1. $Mg^{2+}$
  2. $Cu^{2+}$
  3. $Hg^{2+}$
  4. $Zn^{2+}$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Heavy metals like mercury (Hg2+) act as non-competitive or irreversible inhibitors by binding to the sulfhydryl groups of enzymes, thereby denaturing them or blocking their active sites.