Question

The deficiencies of micronutrients, not only affects the growth of plants but also vital functions such as photosynthetic and mitochondrial electron flow. Among the list is given below, which group of three elements shall affect most, both photosynthetic and mitochondrial electron transport.
A. Cu, Mn, Fe
B. Co, Ni, Mo
C. Mn, Co, Ca
D. Ca, K, Na

Answer 1

Micronutrients are the major group of nutrients that are essential for the body of an organism. These micronutrients include vitamins and minerals. They are known as micronutrients because our body requires them in a very small amount.

Step by step answer: Micronutrients are also known as trace elements. Micronutrients are those which we needed in a small amount which is less than 10mmole per kg of dry matter.
Micronutrients include:
1. Iron
2. Manganese
3. Copper
4. Molybedum
5. Zinc
6. Boron
7. Chloride
8. Nickel.
Micronutrients come in the category of essential elements that the body needed. These essential elements perform several functions. They also participate in variety of metabolic processes in the plant cells which include:
1. Permeability of membrane
2. Maintenance of osmotic pressure of cell water.
3. Participate in an electron transport system
4. Buffering actions
5. Enzymatic activities
6. Photosynthetic
The deficiency of these micronutrients affects the growth as well as on the metabolic functions of the plants such as photosynthetic and electron transport chain in mitochondria. Manganese (Mn) is essential for the activity of some enzymes that are responsible for the Kreb cycle. The enzyme is required in photosynthetic ​evolution. Iron (Fe) is the component of cytochromes and non-heme iron proteins of photosynthesis and respiration. Copper (Cu) is a component of enzymes of redox reactions of electron oxidative phosphorylation and photophosphorylation. Thus, the deficiency of these micronutrients can cause serious effects on the plants.
So, the correct option is option A. Cu, Mn, Fe

Note: Micronutrient requires for animals also include vitamins, which are organic compounds and are required in microgram or milligram amounts. Since plants are the primary origin of nutrients for humans and animals. Some micronutrients may be at low levels and deficiencies can occur when dietary intake is insufficient, as occurs in malnutrition.