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In an energy-limited environment, the energetic cost of a cellular structure imposes a fitness cost and impacts a cell’s evolutionary trajectory.
2 lis 2015 · Although the absolute cost of a gene does increase with cell size, in terms of the fractional contribution to a cell’s energy budget, which ultimately determines whether selection can oppose genome expansion, the cost of an average gene decreases at the DNA, RNA, and protein levels.
29 maj 2018 · Cell metabolism is characterized by three fundamental energy demands: to sustain cell maintenance, to trigger aerobic fermentation and to achieve maximum metabolic rate.
The total energy expenditure of the body depends on its size and composition, and on the level and duration of activity. The energy cost of work depends on the number of muscles involved, the duration of the activity, the speed or rate of movement, and the total strength exerted.
9 cze 2023 · In biology, the fundamental sources of energy involve synthesis of water and photosynthesis. Since both processes are rather complex and cannot be exploited directly, they are used to synthesize ATP which acts as an energy carrier.
Definition. Energy cost refers to the amount of energy required for a biochemical process, such as gluconeogenesis, which is the synthesis of glucose from non-carbohydrate precursors. In gluconeogenesis, the energy cost is significant because it requires ATP and GTP to drive the conversion of substrates into glucose.
15 sty 2011 · All living things expend energy to build structure as well as to maintain order and homeostasis. Animals expend energy to process information, forage for and digest food, pursue prey or escape predators, migrate long distances, feed their young, generate or dissipate heat.
