Question

Ferredoxin is
a. Phenol
b. Protein
c. Fat
d. Carbohydrate

Answer 1

Ferredoxin is an iron-containing substance, which mediates the electron transfer in a range of metabolic reactions, and the term ferredoxin was coined by scientist Wharton, where this ferredoxin found in the chloroplast of plants is called as Chloroplast ferredoxin.

Complete answer:
- Ferredoxin is small, and mostly acidic where they are found everywhere in the biological organisms, and this is iron-sulfur proteins that are helpful in the transfer of electrons in metabolic reactions.
- This ferredoxin is a soluble compound, where it possesses a highly negative redox potential, where they use their iron-sulfur clusters to act as electron distributors in various metabolic reactions or pathways that occur in the body.
- Those transfer of electrons directly to the system may reduce Nitrate and sulfate through NADPH to the system that reduces the carbon dioxide.
- These ferredoxin proteins can be classified according to the nature of their iron-sulfur centers such as 2Fe-2S, and 3Fe- 4S, where they also can be classified by the organisms in which they are isolated for the first time.
- These ferredoxins are proteins that are made up of around 100 amino acids with 4 conserved cysteine residues to which 2Fe- 2S clusters are ligated.
- Based on the type of activity center that present and based on their location, this ferredoxin are classified as different types, such as plant type, where the active center is Fe2S2 and they are found in the chloroplast of plant, in-plant type ferredoxin, iron atoms are tetrahedrally coordinated, by the presence of both inorganic sulfur atoms and by four cysteine residues.
- There are other types of ferredoxins such as Thioredoxin and Adrenodoxin.

Hence, the correct answer is option (B).

Note: Ferredoxin is a protein compound where its active components are iron and sulfur clusters and found in various organisms, such as plants and some microorganisms such as clostridium, so base on the source where it found, it is named in such a way, and its function is electron transfer.