Match each component of the electron transport chain with its description. drag the terms on the left to the appropriate blanks on the right to complete the sentences. fe-s complex iii q (ubiquinone) nadh o2 (molecular oxygen) is a multi-protein complex within the electron transport chain. is a nonprotein organic electron carrier within the electron transport chain. donates electrons to the electron transport chain. is a prosthetic group present in several components of the electron transport chain. is the final electron acceptor of the electron transport chain.

•NADH which is acknowledged for the donation of electron to the ETC

•Complex III is a multi-protein complex which is within the ETC

•Molecular oxygen is the final electron acceptor of ETC

•Q (Ubiquinone) is non-protein organic electron carrier which is within the ETC

•Fe-S is a prosthetic group which is present in several components of ETC

Further details:

NADH:

Nicotinamide adenine dinucleotide (NAD) is a cofactor initiate in all living cells. The compound is named as dinucleotide because it comprises of two nucleotides joined from their phosphate groups. One nucleotide covers an adeninenucleobase and the other nicotinamide. Nicotinamide adenine dinucleotide occurs in two forms: an oxidized and reduced form, condensed as NAD+ and NADH respectively.

Fe-S:

It is an extra component present in the electron transport chain. It is also entitled as FeS or none-haeme iron. It involves cluster of cysteine remains which complex iron through covalent bonds with the sulfur of cysteine. It is related with the flavoproteins and cytochrome b.

Oxygen:

Oxygen sits at the finale of the electron transport chain, where it receives electrons and picks up protons to form water.

Answer details:

Subject:  Biology

Level: High school

Keywords:

•Electron transport chain

•Molecular Oxygen

•Complex III

•Fe-S role in ETC

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Further Explanation:

Fe-S:

Fe-S has a cluster of sulfur and iron. It has a cluster of cysteine residue which holds iron through covalent bonding between the sulfur atoms of cysteine. It is correlated with the cytochrome b and flavoproteins.

Coenzyme-Q(Ubiquinone):

It is an antioxidant and a lipophilic molecule. It acts as a carrier of electron in the electron transport chain.

NADH:

Nicotinamide adenine dinucleotide (NAD) acts as a cofactor to initiate a reaction in living cells. It is a dinucleotide because it contains two molecules of nucleotides joined to each other by a phosphate group. Nicotinamide adenine dinucleotide mainly presents in two forms, one is reduced form and other is oxidized form as NADH and NAD+ respectively.

Oxygen:

Oxygen present the last part of the electron transport chain. In this, they accept electrons and protons to make a water molecule.

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Answer Details:

Grade: High School

Subject: Health

Chapter: Bioenergetics

Keywords:

Nicotinamide, di-nucleotide, electron, proton, oxygen, iron, sulfur, coenzyme, flavoprotein, lipophilic.

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