Biology

Minerals and Nutrients

936 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 evs weather, climate and adaptation of animals to different climates climate and weather weather, climate and adaptations of animals to climate atmosphere and its components

Which three elements constitute 90% of sea water?

  1. Cl, Na, Mg

  2. S, Ca, K

  3. Cl, S, Si

  4. C, K, O
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The most abundant ions in seawater are chloride (Cl-), sodium (Na+), and magnesium (Mg2+). Together with sulfate, calcium, and potassium, they make up the vast majority of dissolved salts.

Multiple choice evs - i food for all improved methods of agriculture receding water table water conservation and irrigation

In fertilizers, NPK stands for:

  1. Nitrogen, Phosphorus, Potassium

  2. Nitrogen, Phosphorus, Krypton

  3. Neon, Potassium, Calcium

  4. Sodium, Phosphate, Potassium
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

NPK $:$ The elemental shorthand for the three major nutrients in fertilizers. “N” stands for Nitrogen, “P” stands for Phosphate (${ P } _{ 2 }{ O } _{ 2 }$) and “K” stands for Potash ($\\ { K } _{ 2 }O$). These are the chemical forms of nitrogen, phosphorus and potassium that are present in fertilizers.

Multiple choice evs - i food for all improved methods of agriculture receding water table water conservation and irrigation

The traces of these element is required for the plant's growth. These are:

  1. iron and silver

  2. calcium and plutonium

  3. nitrogen and nickel

  4. iron and manganese
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Trace elements:-

Iron(Fe)- assists in the manufacture of chlorophyll and other biochemical processes.
Manganese(Mn)- is needed for chlorophyll production.

Multiple choice evs - i food for all improved methods of agriculture receding water table water conservation and irrigation

Name the most important elements required for a plant growth.

  1. potassium , nitrogen, and phosphorus

  2. nitrogen , mercury and hydrogen

  3. zinc , lead and mercury

  4. oxygen , iodine and potassium
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

 The most important elements that plants need, without which they won't thrive, are the three macronutrients: potassium, nitrogen, and phosphorus. Because they are basic building blocks of every plant are ATP, cell membranes and amino acids. Nitrogen is an element in every amino acid; ATP, which is the primary source of energy for all cells, contains phosphorus. Potassium is essential to a plant's ability to metabolize. This element also comprises up to two percent of a plant's weight.

So, the correct answer is 'Potassium, nitrogen, and phosphorus'.

Multiple choice biology coordination generation and conduction of nerve impulse generation of nerve impulse neurons and synapses

The release of chemical messenger from synaptic vesicles is under the influence of which of these ion(s)?

  1. Cl-

  2. Fe++ and s++

  3. Ca ++

  4. Mg++ and Sr++
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When an action potential reaches the axon terminal, voltage-gated calcium channels open. The influx of Ca++ ions triggers the fusion of synaptic vesicles with the presynaptic membrane, releasing neurotransmitters into the synaptic cleft.

Multiple choice development of plants plant growth growth and development plant growth and development biology

Minimum concentration of an essential element below which plant growth is retarded, is termed as _________________.

  1. Optimum concentration

  2. Maximum concentration

  3. Critical concentration

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

Answer is option C i.e. "Critical concentration"
The concentration of the essential element below which plant growth is retarded is termed as critical concentration. Below this minimum level, plants start to show nutrient deficiency.
While, optimum concentration is the most desirable or satisfactory level of a nutrient. Maximum concentration is the highest concentration of nutrient and nutrient toxicity occurs when excess consumption of a nutrient does harm to an organism.

Multiple choice chemistry p- block elements-ii group 17 elements - general properties group 17 elements group 17 elements - properties

Sea weeds are an important source of :

  1. Iron

  2. Chlorine

  3. Iodine

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

Iodine is a component of almost every living plant and animal. No standard measurements of iodine in food exist because iodine concentrations vary across the world. In general, foods from the sea contain the most iodine, followed by animal foods, then plant foods. Of all foods, seaweed (like kelp), is the most well known and reliable source of natural iodine. Egg and dairy products can also be good sources.

Multiple choice zoology our environment - our concern biomagnification the effects of human activities on ecosystems bioaccumulation and biomagnification

Calcium metabolism in birds gets disturbed due to effect of ___________

  1. Mercury

  2. Cadmium

  3. DDT

  4. Lead

  5. Copper
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Dichlorodiphenyltrichloroethane or DDT is a crystalline, colourless and odourless compound which is used as an insecticide. DDT on runoff from the fields reach the water bodies and gets accumulated in the bodies of fishes. When fishes are eaten by birds, it gets accumulated in the body of birds and hence, in this way it gets incorporated in the food chain. With each successive trophic level, concentration of DDT increases and this is known as biomagnification. 
High concentration of DDT disturbs the calcium metabolism of birds and reptiles and causes thinning of egg shells. and premature breaking. This leads to decline in their population.
So, the correct answer is 'DDT'.
Multiple choice biology blood circulatory system of human blood clotting platelets and their function defence against infectious disease

The process of blood clotting does not require

  1. Sodium ions

  2. Calcium ions

  3. Prothrombin

  4. Vitamin K

  5. Platelets
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Blood clotting is the process by which blood changes from liquid to gel and stop bleeding. When the blood vessels get injured, platelets in blood produces prothrombin in the presence of vitamin K. The prothrombin then converts into the thrombin (active form) in the presence of thrombokinase and calcium ions. This thrombin then converts fibrinogen (inactive) into the fibrin (active). Fibrin thread then plugs the damaged part and appear like a clot. Thus, the correct answer is option A.

Multiple choice botany living world mycorrhiza classification of fungi kingdom monera, protista and fungi useful and harmful microbes

Which one of the following plays an important role in phosphate nutrition of plants? 

  1. VAM

  2. 1PM

  3. Legumes

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

Role of VAM in Nutrient uptake of crop plants:

  • Microorganism and their role in soil must be considered as a key component among those conferring soil fertility and productivity.
  • One of the most important plants-microbe interactions is the association of vesicular-arbuscular mycorrhizae (VAM) fungi with higher plants.
So, the correct option is 'VAM'.

Multiple choice blackman's principle of limiting factors photosynthesis in higher plants biology

Among these groups, one element is involved in opening and closing of stomata, the other helps to maintain ribosome structure. Choose the correct option.

  1. K and Ca

  2. P and S

  3. K and Mg

  4. Fe and Mg
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Potassium (K) and Magnesium (Mg) are essential macronutrients for plants.

K is absorbed as $K^+$. In plants, it is required in more abundant quantities in the meristematic tissues, buds, leaves and root tips. It helps to maintain an anion-cation balance in cells. It is involved in opening and closing of stomata.
Mg is absorbed by plants in the form of divalent magnesium ion ($Mg^{2+}$). It is required in the growing area of roots and stem, seeds, leaves, etc. It occurs as magnesium pectate in middle lamella. It is responsible for maintenance of ribosome structure because it is required for the binding of ribosome subunits during protein synthesis

Multiple choice blackman's principle of limiting factors photosynthesis in higher plants biology

The most abundant intracellular cation is

  1. $Ca^{++}$
  2. $H^+$
  3. $K^+$
  4. $Na^+$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Sodium ion is the most abundant extracellular cation, while potassium ion is the most abundant intracellular cation. Both maintain osmotic balance, both involved in nerve conduction and maintainance of membrane potential in animals, while potassium alone is involved in guard cell movements and many other plant movements. Living cells operate sodium potassium pump to regularly throw out sodium and take in potassium ions.
So, the correct answer is '$K^+$'
Multiple choice blackman's principle of limiting factors photosynthesis in higher plants biology

The metal ion involved in the stomatal regulation is or Stomata will open, if there is accumulation of the following elements in the guards cells

  1. Iron

  2. Magnesium

  3. Zinc

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

Potassium ions movement into and out of guard cells is related to the turgidity and consequent opening and closing of stomatal pore.