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Why many reactions take place in living cells at temperature far lower than those required for the same reactions in a laboratory?
Many reactions in living cells occur at much lower temperatures than in laboratory settings due to the presence of enzymes, which are biological catalysts that accelerate chemical reactions. Enzymes lower the activation energy required for reactions, enabling them to occur at the temperatures typically found in living organisms. This allows cells to efficiently carry out essential metabolic processes without the need for extreme heat, which could be damaging to cellular structures. Additionally, the aqueous environment of cells facilitates these reactions, further supporting biochemical activity at lower temperatures.
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Why do living things use enymes instead of heat as a source of activation energy?
Living things use enzymes as a source of activation energy because enzymes are highly specific and can catalyze reactions at a much lower temperature than would be required by heat alone. Enzymes increase the rate of chemical reactions without being consumed, allowing for efficient and controlled reactions within the narrow temperature range suitable for living organisms. Additionally, enzymes can be regulated by the cell to ensure that reactions occur only when needed.
What do chemical reactions in living organisms need to start?
Chemical reactions in living organisms require a source of energy to start. This energy is typically obtained from molecules such as ATP. Additionally, enzymes play a critical role in catalyzing these reactions by lowering the activation energy required for the reaction to occur.
Do Chemical reactions only occur in living organisms?
No, chemical reactions occur in both living and non-living systems. In living organisms, chemical reactions are essential for metabolic processes, while in non-living systems, chemical reactions can occur in various environments such as inorganic chemical reactions in the environment.
Which is required by all living things?
Water is required by all living things for various biological processes, including metabolism, temperature regulation, and nutrient transport. Without water, organisms cannot survive.
What is the effect enzymes have on reactions in living cells?
An enzyme lowers the activation energy of a reaction meaning that the reaction can occur at a much lower temperature. Enzymes are essential for supporting life, without enzymes the daily reactions that take place within all living organisms could not take place and life would cease to be able to exist.
Why do living things use enymes instead of heat as a source of activation energy?
Living things use enzymes as a source of activation energy because enzymes are highly specific and can catalyze reactions at a much lower temperature than would be required by heat alone. Enzymes increase the rate of chemical reactions without being consumed, allowing for efficient and controlled reactions within the narrow temperature range suitable for living organisms. Additionally, enzymes can be regulated by the cell to ensure that reactions occur only when needed.
What statement best describes an individual enzyme?
An enzyme is a protein catalyst that speeds up chemical reactions in living organisms by lowering the activation energy required for the reactions to occur. Each enzyme is specific to a particular reaction or group of reactions and can be affected by factors such as pH, temperature, and substrate concentration.
How can photosynthesis be increased by increasing the temperature?
Temperature affects living things mainly by affecting the rate of chemical reactions. These are catalysed by enzymes, which are speeded up by increasing the temperature. The Calvin cycle is a series of chemical reactions, so increasing the temperature increases the rate of reactions in the Calvin cycle and so increases the rate of photosynthesis.
Which is a type of protein that speeds up chemical reactions in living things?
An enzyme is a type of protein that speeds up chemical reactions in living things by lowering the activation energy of said reactions.
What Organic molecules that catalyze reactions in living systems are?
Enzymes are the organic molecules that catalyze reactions in living systems. They act as biological catalysts by decreasing the activation energy required for a chemical reaction to occur. Enzymes are typically specific to particular substrates and can speed up reactions by many orders of magnitude.
Why do living things need both endothermic and exothermic reactions in their bodies?
Living things have cellular reactions which involve both reactions in the process. Endothermic reactions help the body conserve energy or contain it. Exothermic reactions help the body produce energy.
Why energy required for living things?
Living things need energy for several important processes that are vital to life. One of the most important is the growth and repair of cells and tissues - energy is required for the various biochemical reactions that achieve this.
What do chemical reactions in living organisms need to start?
Chemical reactions in living organisms require a source of energy to start. This energy is typically obtained from molecules such as ATP. Additionally, enzymes play a critical role in catalyzing these reactions by lowering the activation energy required for the reaction to occur.
What role do enzyme proteins play in catalyzing biochemical reactions within living organisms?
Enzyme proteins act as catalysts in living organisms, speeding up biochemical reactions by lowering the activation energy required for the reactions to occur. This allows the reactions to happen more efficiently and quickly, enabling essential processes such as metabolism, growth, and repair to take place in the body.
What special proteins speed up the rate of condensation and hydrolysis reactions?
Enzymes are special proteins that speed up the rate of condensation and hydrolysis reactions by lowering the activation energy required for these reactions to occur. They act as biological catalysts to facilitate these biochemical reactions in living organisms.
Do Chemical reactions only occur in living organisms?
No, chemical reactions occur in both living and non-living systems. In living organisms, chemical reactions are essential for metabolic processes, while in non-living systems, chemical reactions can occur in various environments such as inorganic chemical reactions in the environment.
Substances that promote chemical reactions in living things but not affected by the reaction are?
enzymes. Enzymes are biological catalysts that increase the rate of chemical reactions in living organisms without being consumed in the process. They help lower the activation energy required for a reaction to occur.
