The Answer is D : When tryptophan is present at high concentrations, the repressor binds to the operator and transcription is initiated and not terminated.
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These cells are likely to use large amounts of ATP.
When an organism is exposed to a limited quantity of oxygen, the cell's mitochondria will stop cellular respiration involving the Krebs cycle and enter the process of fermentation to survive, it means <span>Fermentation must create a net gain of ATP.</span>
The answer would be, Fats. Since Triglycerides (3 fatty acids + 1 glycerol) are those lipids which are commonly known as lipids.