Explanation:
The lac operon
When lactose is present, bacteria need the enzymes to break it down. But if no lactose is present, bacteria do not need to waste resources making enzymes to break down a sugar that isn't there. Like a switch, the operon is turned on when the enzymes are needed.
impact the amount of biomass an
ecosystem can support?
In aerobic respiration, the final electron acceptor in the electron transport chain is oxygen. It accepts two electrons and a molecule of water is formed as a by product.
In anaerobic respiration, the final electron acceptor in the electron transport chain is pyruvate. Anaerobic respiration commonly occurs in the muscle tissue of animals as a result of intense activity or exertion. Pyruvate is used as makeshift electron acceptor in place of oxygen and is reduced or converted to lactic acid.
In the electron transport chain involved in aerobic respiration, oxygen plays the essential role of final electron acceptor. It receives low-energy electrons and forms water, allowing the process to continue and ATP to be produced. This chain also allows for the creation of various other biochemical molecules.
The final electron acceptor in the electron transport chain, which is a part of aerobic respiration, is oxygen. As electrons are passed down the electron transport chain, from NADH or FADH₂, they lose energy. This journey through a series of redox reactions creates an electrochemical gradient used in chemiosmosis, contributing to the production of ATP.
Oxygen is the final receiver of these low-energy electrons. In combination with hydrogen ions, it forms water, which is one of the end products of the electron transport chain. Consequently, the presence of oxygen is crucial for the functioning of the electron transport chain and the production of ATP, our body's primary energy currency.
ATP generation is only one of the many functions of the electron transport chain. Other biochemical molecules, such as nonessential amino acids, sugars and lipids, can also be produced from intermediate compounds of glucose catabolism. These molecules, in turn, can serve as energy sources for glucose pathways.
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B. distillation
C. osmosis
D. chromatography 2: The process of fractionation is based on which property of the components of a solution?
A. boiling points
B. freezing points
C. concentrations
D. molarities
3: Crude oil is separated into different substances such as gasoline, petroleum, diesel fuel, and propane by which process?
A. filtering
B. chromatography
C. osmosis
D. fractionation 4: Professional and amateur athletes are often tested for the use of illegal performance-enhancing drugs. Which of the following processes is used to separate these chemicals from a blood or urine sample?
A. distillation
B. fractionation
C. osmosis
D. chromatography 5: Which of the following involves separating a solution by moving liquids across a selectively permeable membrane?
A. chromatography
B. osmosis
C. fractionation
D. distillation