What happens at the active site of an enzyme quizlet?
the active site of an enzyme is the region that binds the substrates(and cofactor if any) The interaction of the enzyme and substrate at the active site promotes the formation of the transition state. the enzyme changes shape on substrate binding.
Which term describes enzyme?
An enzyme is a biological catalyst that speeds chemical processes. A substrate is the substance that reacts in contact with an enzyme . Enzymes are specific when reacting with a substrate.
Which is best definition of activation energy?
Which is the best definition of activation energy ? the energy required to form or break the bonds of reactant molecules.
Which statement best describes the amount of catalyst that remains at the end of the reaction?
The test tube that stops bubbling first contains the catalyst . Which statement best describes the amount of catalyst that remains at the end of a reaction ? The amount of catalyst is the same at the end as at the beginning of the reaction .
What is the role of the active site of an enzyme?
In biology, the active site is the region of an enzyme where substrate molecules bind and undergo a chemical reaction. An active site can catalyse a reaction repeatedly as residues are not altered at the end of the reaction (they may change during the reaction, but are regenerated by the end).
What happens to the active site of an enzyme?
To catalyze a reaction, an enzyme will grab on (bind) to one or more reactant molecules. These molecules are the enzyme’s substrates. The part of the enzyme where the substrate binds is called the active site (since that’s where the catalytic “action” happens ). A substrate enters the active site of the enzyme .
What type of biomolecule is an enzyme?
Enzymes are biological molecules ( proteins ) that act as catalysts and help complex reactions occur everywhere in life. Let’s say you ate a piece of meat. Proteases would go to work and help break down the peptide bonds between the amino acids .
What is the function of an enzyme?
An enzyme is a type of protein found within a cell. Enzymes create chemical reactions in the body . They actually speed up the rate of a chemical reaction to help support life.
Which reaction is exothermic?
In the case of an exothermic reaction, the reactants are at a higher energy level as compared to the products, as shown below in the energy diagram. In other words, the products are more stable than the reactants . Overall Δ H ΔH ΔH for the reaction is negative, i.e., energy is released in the form of heat.
What is activation energy in simple words?
Activation energy , in chemistry, the minimum amount of energy that is required to activate atoms or molecules to a condition in which they can undergo chemical transformation or physical transport.
What is activation energy affected by?
The activation energy of a chemical reaction is closely related to its rate. Specifically, the higher the activation energy, the slower the chemical reaction will be. This is because molecules can only complete the reaction once they have reached the top of the activation energy barrier.
Which is the best definition of activation energy the energy required to end a chemical reaction?
Answer. It is defined as the least possible amount of energy (minimum) which is required to start a reaction or the amount of energy available in a chemical system for a reaction to take place.
How does an enzyme influence a biological reaction?
Enzymes are biological catalysts. Catalysts lower the activation energy for reactions . The lower the activation energy for a reaction , the faster the rate. Thus enzymes speed up reactions by lowering activation energy.
Which best describes how an enzyme affects the rate of a chemical reaction?
Which best describes how an enzyme affects the rate of a chemical reaction ? It lowers the activation energy of the reaction .
How does a catalyst influence a chemical reaction?
Catalysts are compounds that accelerate the rate of a reaction . Catalysts accelerate reactions by reducing the energy of the rate-limiting transition state. Catalysts do not affect the equilibrium state of a reaction .