2. Enzymes accelerates rate of reaction by
(1) Lowering number of transition states
(2) Lowering the activation energy of highest transition state
(3) Providing direct energy to substrate
(4) Providing more chance to substrates to react together
The correct answer is:
(2) Lowering the activation energy of highest transition state.
How Enzymes Accelerate Reaction Rates
Enzymes are biological catalysts that increase the rate of chemical reactions by lowering the activation energy required for the reaction to occur. The activation energy is the energy barrier that must be overcome for reactants to transform into products. By stabilizing the transition state and decreasing the activation energy, enzymes enable reactions to proceed much faster at physiological temperatures.
Why Lowering Activation Energy Is Key
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Activation energy corresponds to the highest energy barrier (transition state) that reactants must surpass for a chemical reaction to happen.
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Enzymes do not directly provide energy to substrates or simply increase collisions; they specifically stabilize and lower the energy of the transition state.
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This reduction in energy requirement allows a greater proportion of reactant molecules to participate effectively in the reaction, drastically increasing reaction rate.
Explanation of Other Options
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(1) Lowering number of transition states: Enzymes do not alter the number of transition states; each reaction pathway has a defined transition state, and enzymes stabilize it.
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(3) Providing direct energy to substrate: Enzymes do not inject energy into substrates. Their role is to reduce the activation energy barrier, not to supply energy.
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(4) Providing more chance to substrates to react together: While enzymes can orient substrates to increase the likelihood of reaction, the primary mechanism is lowering the activation energy of the transition state.
How Enzymes Lower Activation Energy
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Enzymes bind reactants (substrates) at their active site.
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They may position substrates to favor productive collisions, strain bonds within the substrate, or provide an optimal chemical environment.
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The enzyme-substrate complex stabilizes the transition state, effectively lowering the energy required for the reaction to proceed.
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This allows reactions that would otherwise be too slow to sustain life at normal temperatures.
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Enzymes are crucial for speeding up reactions in biological systems, and their fundamental role is lowering the activation energy of the highest transition state during catalysis. This mechanism ensures efficient biochemical processes without altering the equilibrium or directly supplying energy, making life possible at mild temperatures.
58 Comments
vishal
September 12, 2025🙏
Roopal Sharma
September 12, 2025Enzymes accelerate the reaction by lowering the activation energy .
Sakshi yadav
September 12, 2025Enzyme accelerates rate of reaction by lowering the activation energy of highest transition state.
Aakansha sharma Sharma
September 12, 2025Lowering the activation energy of highest transition state.
Priya dhakad
September 12, 2025Enzymes accelerate rate of rxn by Lowering the activation energy of highest transition state.
Mohd juber Ali
September 12, 2025Enzym speed up or accelerate biochamical rexn by lowring activation energy of highest transition site
Sakshi Kanwar
September 12, 2025At higher transition state that is at ES complex the enzyme lower the activation energy
Heena Mahlawat
September 12, 2025By lowering the energy of highest transition state or by decreasing activation energy needed to begin chemical reaction
Mansukh Kapoor
September 12, 2025The correct answer is option 2nd
By lowering the activation energy of the highest transition state
Neha Yadav
September 12, 2025Enzyme accelerates the rate of reaction by lowering the activation energy of highest transition state ( i.e, ES Complex)
Varsha Tatla
September 12, 2025Enzyme accelerate the reaction by lowering the activation energy of transition state
Aafreen Khan
September 12, 2025Lowering the activation energy of highest transition state
Tanvi Panwar
September 12, 2025Enzymes accelerates rate of reaction by lowering activation energy of highest transition state.
Dharmpal Swami
September 12, 2025Enzyme accelerate the rate of rex.and lowering the energy of high transition state
Santosh Saini
September 12, 2025Enzymes accelerate the rate of a chemical reaction by lowering the activation energy of highest transition state
Kanica Sunwalka
September 12, 2025Enzymes- primary mechanism is to lower the Ea of highest transition state
they do not play role in
*alteration of transition state
* injecting energy into substrate
Anurag Giri
September 13, 2025Option 2 is correct
Enzymes are biological catalysts that increase the rate of chemical reactions by lowering the activation energy
Kirti Agarwal
September 13, 2025Lowering the activation energy to highest transition state
Bharti yadav
September 13, 2025Enzymes accelerate the rate of reaction by Lowering the activation energy of highest transition state.
Bhawna Choudhary
September 13, 2025Lowering the activation energy to highest transition state
Soniya Shekhawat
September 13, 2025Enzyme is a Bio catalyst that will be that increase chemical reaction by decreasing the activation energy , activation energy means as a energy barrier that means in which prevent to the conversion of reactant and into product so enzyme stabilize the transitions state that will be have decrease the activation energy so reaction is easily processed.
Nilofar Khan
September 13, 2025correct answer is (2)
Lowering the activation energy of highest transition state.
Sonam Saini
September 13, 2025Lowering activation energy of highest transistor state
Manisha choudhary
September 13, 2025Done sir
Enzyme reaction ki activation energy ko km kr deti h and transition state ko stablized krte h jis s low temperature p bhi efficiently reaction hoti h
Enzyme, substrate ko orient kr k bhi rate of reaction bdhata h pr primarily function lowering the activation energy hoti h
Ayush Dubey
September 13, 2025Lowering the activation energy of highest transition state
Surendra Doodi
September 14, 2025The activation energy is the energy barrier that must be overcome for reactants to transform into products
Deepika sheoran
September 14, 2025Option 2nd correct
Lowering the Activation energy of highest transition state..
Pratibha Jain
September 14, 2025correct answer is option (2)
Lowering the activation energy of highest transition state.
Avni
September 14, 2025lowering the activation energy of the highest transition state
Khushi Agarwal
September 14, 2025Option B is correct
Enzymes accelerates rate of reaction by
Lowering the activation energy of highest transition state
Vanshika Sharma
September 14, 2025Enzyme accelerats rate of reaction by lowering the activation energy of higher transition state
Anjali
September 14, 2025Lowering the activation energy of highest transition state
Simran Saini
September 14, 2025Lowering the activation energy of highest transition state.
Varsha Kanwar shishodiya
September 14, 2025Lowering the activation energy of highest transition state.
Mitali saini
September 14, 2025The correct answer is:
(2) Lowering the activation energy of highest transition state.
Anju
September 14, 2025Ans:2
Lowering the activation energy of highest transition state
Rishita
September 14, 2025Lowering the activation energy of highest transition state.
Arushi Saini
September 14, 2025Enzymes lowers the activation energy of highest transition state
Asha Gurzzar
September 14, 2025Lower the activation energy of highest transition state
Pallavi Ghangas
September 14, 2025Lowering activation energy
anjani sharma
September 14, 2025Lowering the activation energy of highest transition state.
Payal Gaur
September 14, 2025Lowering the activation energy of highest transition state
Sneha Kumawat
September 14, 2025Lowering the activation energy of highest transaition state
yashika
September 14, 2025Enyme lower East of highest transition state
Devika
September 15, 2025Lowering the activation energy of highest transition state
Preeti
September 15, 2025lowering the activation energy of highest transition state
Khushi Vaishnav
September 15, 2025Lowering the activation energy of highest transition state.
Bhavana kankhedia
September 15, 2025Lowering the activation energy of highest transition state.
Muskan Yadav
September 15, 2025Lowering the activation energy of highest transition state.
Anjana sharma
September 16, 2025Lowering the activation energy of highest transition state.
Minal Sethi
September 16, 2025Lowering the activation energy of highest transition state
Yogita
September 16, 2025Lowering the activation energy of highest transition state
Muskan singodiya
September 16, 2025Lowaring the activation energy of highest transition state
Alec
September 16, 2025Lowering the activation energy of highest transition state
Monika jangid
September 16, 2025Lowering the highest energy of highest transition state
Divya rani
September 17, 2025Enzyme accelerates a reaction by lowering the activation energy of the highest Transition state.
Priti khandal
September 17, 20252 is right
Palak Sharma
September 21, 2025Enzymes accelerate the reaction by lowering the activation energy .