Which of the following sequences of electron carriers could represent a workable bacterial electron transport chain? a. cytochromes, followed by an iron-sulfur protein, and quinones. b. quinones, cytochromes, iron-sulfur proteins, and a flavoprotein. c. a flavoprotein, followed by an iron-sulfur protein, quinones, and cytochromes. d. cytochromes, followed by quinones and a flavoprotein.
Bacterial Morphology
The bacteria are prokaryotic organisms that are single-celled, and are found to exist as free-living and possess a microscopic size. The morphology is found to vary in the bacteria, where some of them are identified as individual organisms and the others are detected as colonies. The size and shape of the bacterial cell also represent its morphology.
Bacterial cell structure
Bacteria are single-celled, tiny creatures that may enter healthy tissues and grow rapidly. Bacteria are microscopic organisms that are tiny and unicellular. These are members of the prokaryote kingdom. They live in water, air, soil, and all-natural environments. They are used in industrial and therapeutic processes, and they support a wide range of plant and animal life. The first organism to appear on the planet. Bacteria-like creatures are the oldest known fossils. Bacteria can consume a wide range of organic and inorganic elements, and some may even survive in harsh conditions.
Which of the following sequences of electron carriers could represent a workable bacterial electron transport chain?
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a. cytochromes, followed by an iron-sulfur protein, and quinones. |
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b. quinones, cytochromes, iron-sulfur proteins, and a flavoprotein. |
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c. a flavoprotein, followed by an iron-sulfur protein, quinones, and cytochromes. |
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d. cytochromes, followed by quinones and a flavoprotein. |
Bacteria are prokaryotic organisms which lack mitochondria, but the electron transport chain is similar to that of eukaryotes. Bacteria have different types of electron transport chains, but the aim is to produce ATP. Electrons are transferred from NADH/FADH2 to O2 through a series of electron carriers and proton pumps present on the cell membrane and with the presence of a proton gradient across the cell membrane, electron is terminally accepted and ATP is produced by ATPase. The process of electron transfer mechanism begins when the hydride ion is removed from NADH and is converted into a proton and two electrons. Most of the electron carrier contains large respiratory enzyme complexes which are transmembrane proteins. The highly excited electrons move along the chain and gradually lose its energy. The energy released during the redox reactions of NADH or FAD/FADH2 is used for the formation of ATP.
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