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an enzyme is a protein that catalyzes (increases the rates of) reactions by lowering the activation energy required for the reaction. enzymes catalyze all kinds of reactions, including endergonic reactions.
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What do chemical reactions that absorb energy need to occur?
They need a source of energy.A Source of Energy
Chemical reactions that absorb energy will not occur without a source of energy true or false?
This is true. Energy is required to begin all reactions.
What type of chemical reaction cannot occurs spontaneously endothermic or exothermic?
An 'exothermic' reaction gives of energy, and an 'endothermic' reaction absorbs energy.
What fraction of the carbon dioxide exhaled by animals is generated by the reactions of the citric acid cycle if glucose is the sole energy source?
Two thirds of it
Why do endothermic reactions need additional energy to keep going while exothermic reactions don't?
Ipso facto. An endothermic reaction "absorbs" energy (uses it to create high-energy bonds), so this must be constantly supplied from an external source. An exothermic reaction "releases" energy, and this energy can be used to continue the reaction until there are no reactants remaining.This is why stellar cores cannot fuse massive quantities of elements heavier than iron. The reactions are not self-perpetuating as they are absorbing energy rather than releasing it. A large, inert iron core is the result.
What happens during an endergonic reaction?
An endergonic reaction is a chemical reaction in which the standard change in free energy is positive, and energy is absorbed. To view the source and read more about endergonic reactions go to: http://en.wikipedia.org/wiki/Endergonic_reaction
Does enzyme contains high sugar?
No. An enzyme is a chemical that speeds up chemical reactions without adding any energy to them. Sugar is an energy source that makes some chemical reactions happen. They are different things and work on different principles.
In cells what is the source of energy for an endergonic reaction?
ATP
What type of chemical reactions will not occur without a source of energy?
The answer the question is probably looking for is "endothermic reactions", though that's not necessarily 100% accurate. Some exothermic reactions have very high activation energies and will not proceed in the absence of a catalyst without an initial source of energy (though, once started, the reaction itself may provide enough energy to keep it going). Also, technically, "endothermic" refers specifically to heat or thermal energy. For energy generally we should use the term "endergonic" instead, though that's a less common term.
What do chemical reactions that absorb energy need to occur?
They need a source of energy.A Source of Energy
Is chemical energy a source of electricity?
no, chemical energy is the energy released from chemical reactions
Chemical reactions that absorb energy will not occur without a source of energy true or false?
This is true. Energy is required to begin all reactions.
What type of chemical reaction cannot occurs spontaneously endothermic or exothermic?
An 'exothermic' reaction gives of energy, and an 'endothermic' reaction absorbs energy.
Are chemical reactions that absorb energy will occur without a source of energy?
false
What is the source of H for the Calvin cycle in photosynthesis?
The reduced NADPH2 made during light dependent stage of photosynthesis carries thehydrogen ion
What substance from the light-dependent reactions is a source of energy for the light-independent reactions of photosynthesis?
They are ATP and NADH. They are energy carrying molecules.
Which nuclear reactions is the source of the sums energy?
Nuclear fusion
