Biology

Minerals and Nutrients

849 Questions

Review essential biology concepts regarding minerals and nutrients in this question bank. It covers trace elements required by plants and minerals crucial for human blood and bone formation. These facts frequently appear in general science exams.

Essential plant micronutrientsChlorophyll synthesis elementsHuman blood and bone mineralsTrace elements in physiology

Minerals and Nutrients Questions

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

Mineral ion concentration in tissues that reduces, the dry weight of tissues by about 10% is considered as 

  1. Critical concentration

  2. Toxic concentration

  3. Optimum concentration

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

In plant physiology, any mineral ion concentration that reduces the dry weight of tissues by about 10% is defined as the toxic concentration.

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

Which of the following is not a role played by Potassium in plant growth?

  1. Translocation of carbohydrates

  2. Maintaining anion-cation balance

  3. Opening and closing of stomata

  4. Synthesis of proteins

  5. Maintaining turgidity of cells
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Potassium is involved in stomatal opening, enzyme activation, and protein synthesis, but it is not directly responsible for the translocation of carbohydrates; that is primarily the role of Boron.

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

Minerals that activate respiratory enzymes

  1. N and P

  2. Mg and Mn

  3. K and Ca

  4. S and Fe

  5. Cu and Bo
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Magnesium (Mg) is essential for the activation of enzymes involved in respiration and photosynthesis. Manganese (Mn) is also a key activator for several respiratory enzymes, including those in the Krebs cycle.

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

The inorganic essential elements which are obtained from the soil are called as 

  1. Mineral elements

  2. Non-mineral elements

  3. Non- essential elements

  4. Both (b) and (c)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Essential elements that plants absorb from the soil in inorganic form are classified as mineral elements. Non-mineral elements like carbon, hydrogen, and oxygen are typically obtained from air and water.

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

Regarding the mineral nutrition of plants, which one of the following statements is correct?

  1. The availability of iron to plants decrease with the increase of acidity of the soil
  2. The presence of $CO _2$ dissolved in the soil water reduces the solubility of carbonates of lime in it

  3. Molybdenum is a constituent of nitrate reductase system

  4. Sulphur is a constituent of phenylalanine
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Molybdenum is a crucial micronutrient for plants and acts as a structural component of the nitrate reductase enzyme system involved in nitrogen assimilation.

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 evs the muscular system and digestive system in human beings human muscular system closer look into muscular system muscles and its types

Which of the following ions are necessary in the chemical events of the muscle contraction?

  1. Sodium and Potassium

  2. Sodium and Magnesium

  3. Calcium and Magnesium

  4. Sodium and Calcium
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

For contraction of muscles, a stimulus is required 

Impulse is generated when an action potential is initiated, the muscles then shortens in length and trigger sarcoplasmic reticulum to release calcium ions into the interior of muscle and they bind to troponin, thus causing tropomyosin shift from the face of actin filaments to which myosin head need to bind to produce contraction. Thus, Calcium plays important role in muscle contraction Magnesium plays important role in muscle regulation.
So, the correct answer is 'Calcium and Magnesium'

Multiple choice biology structural organization in living organisms structure of a plant cell levels of organisation in plants plant and animal cell

Most abundant element in plant body is 

  1. Potassium

  2. Nitrogen

  3. Carbon

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

A most abundant compound in living organisms protoplasm is water. Plants contain even more water than animals do- most of them are anywhere from 90 to 95% water. In plants, about 85% of the fresh weight of leaves can be water. Each water molecule is made up of two hydrogen and one oxygen atom. Hence, hydrogen is the most abundant element in a plant body.

Multiple choice biology skeleton, joints and muscles skeleton our skeletal system and the skin skeleton - movement and locomotion

Besides calcium phosphate, the bones contain

  1. Calcium chloride

  2. Magnesium carbonate

  3. Sodium chloride

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

The salts of magnesium and calcium forms an integral part of the skeletal system. Magnesium combines with phosphates, to form magnesium phosphate which contributes to the bone density. It forms major part of dry matter of bones. Osteoporosis is caused, due to the decrease in the density of calcium and magnesium salts in the body. It also helps in muscle contraction. 60% of the total magnesium are present in the bones.
So, the correct option is D.

Multiple choice biology excretion to maintain homeostasis kidney dialysis kidney disorders disorders of kidney

Most common kidney stones are made up of

  1. Magnesium phosphate

  2. Calcium oxalate

  3. Uric acid

  4. Cholesterol
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
There are four main types of kidney stones. Calcium stones are the most common type of kidney stones. They are usually made of calcium and oxalate (a natural chemical found in most foods) but are sometimes made of calcium and phosphate. Uric acid stones form when urine is often too acidic.
So, the correct option is 'Calcium oxalate'.
Multiple choice chemistry water and air and their importance natural cycles and resources constituents of air component of air - nitrogen

The three elements most usually contained in fertilizers are:

  1. Potassium, phosphorus and carbon

  2. Sodium, nitrogen and phosphorus

  3. Silica, nitrogen and phosphorus

  4. Potassium, phosphorus and nitrogen
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Fertilizers are composed of three macronutrients, $NPK$ nitrogen, phosphorous and potassium.

Nitrogen ($N$): Leaf growth;
Phosphorus ($P$): Development of roots, flowers, seeds, fruit;
Potassium ($K$): Strong stem growth, movement of water in plants, promotion of flowering and fruiting;