The figure given Progress of Reaction Product Substrate B A C D below shows the conversion of a substrate into product by an enzyme. In which one of the four options (A-D) the components of reaction labelled as A, B, C and D are identified correctly? A B C D (a) Potential Transition Activation Activation energy state energy energy with without enzyme enzyme (b) Transition Potential Activation Activation state energy energy energy without with enzyme enzyme (c) Potential Transition Activation Activation energy state energy energy with without enzyme enzyme (d) Activation Transition Activation Potential energy state energy energy with without enzyme enzyme

The figure given
Progress of Reaction
Product
Substrate
B
A
C
D
below shows the
conversion of a
substrate into
product by an
enzyme. In which
one of the four
options (A-D) the
components of
reaction labelled as A, B, C and D are identified
correctly?
 A B C D
(a) Potential Transition Activation Activation
 energy state energy energy
 with without
 enzyme enzyme
(b) Transition Potential Activation Activation
 state energy energy energy
 without with
 enzyme enzyme
(c) Potential Transition Activation Activation
energy state energy energy
 with without
 enzyme enzyme
(d) Activation Transition Activation Potential
 energy state energy energy
 with without
 enzyme enzyme
by

1 Answer

Answer :

(b) Transition Potential Activation Activation
 state energy energy energy
 without with
 enzyme enzyme
by

Related questions

The figure given below shows a small part of human lung where exchange of gases takes place. Select the option which represents labelled part (A, B, C or D) correctly identified along with its function. (a) C : Arterial capillary - Passes oxygen to tissues (b) A : Alveolar cavity - Main site of exchange of respiratory gases (c) D : Capillary wall - Exchange of O2 and CO2 takes place here (d) B : Red blood cells - Transport of CO2 mainly

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Last Answer : (b) A : Alveolar cavity - Main site of exchange of respiratory gases

The figure below shows the structure of a mitochondrion with its four parts labelled A, B, C and D. Select the part correctly matched with its function. D B A C (a) D (outer membrane) – gives rise to inner membrane by splitting (b) B (inner membrane) – forms infoldings called cristae (c) C (crista) – possesses single circular DNA molecule and ribosomes (d) A (matrix) – major site for respiratory chain enzyme

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Last Answer : (b) B (inner membrane) – forms infoldings called cristae

Which of the following describes the given graph correctly? Potential energy Reaction Product Substrate B A (a) Endothermic reaction with energy A in presence of enzyme and B in absence of enzyme. (b) Exothermic reaction with energy A in presence of enzyme and B in absence of enzyme. (c) Endothermic reaction with energy A in absence of enzyme and B in presence of enzyme. (d) Exothermic reaction with energy A in absence of enzyme and B in presence of enzyme.

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Given below is the diagram of a stomatal apparatus. In which of the following all the four parts labelled as A, B, C and D are correctly identified? A B C D A B C D (a) Subsidiary Epidermal Guard cell Stomatal cell cell aperture (b) Guard cell Stomatal Subsidiary Epidermal aperture cell cell (c) Epidermal Guard cell Stomatal Subsidiary cell cell aperture (d) Epidermal Subsidiary Stomatal Guard cell cell cell aperture

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Last Answer : d) Epidermal Subsidiary Stomatal Guard cell cell cell aperture

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An enzyme promotes a chemical reaction by (A) Lowering the energy of activation (B) Causing the release of heat which acts as a primer (C) Increasing molecular motion (D) Changing the free energy difference between substrate and product

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Last Answer : Answer : A

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The curve given below shows enzymatic activity in relation to three conditions (pH, temperature and substrate concentration). What do the two axes (X and Y) represent? X-axis Y-axis (a) Enzymatic activity pH (b) Temperature Enzyme activity (c) Substrate Enzymatic concentration activity (d) Enzymatic activity Temperature

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The figure given below depicts a diagrammatic sectional view of the human female reproductive system. Which set of three parts out of I-VI have been correctly identified? I II III V VI IV (a) (II) Endometrium, (III) Infundibulum, (IV) Fimbriae (b) (III) Infundibulum, (IV) Fimbriae, (V) Cervix (c) (IV) Oviducal funnel, (V) Uterus, (VI) Cervix (d) (I) Perimetrium, (II) Myometrium, (III) Fallopian tube

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The reaction step that has its transition state at the highest point on the reaction coordinate is the called the __________. (a) rate-determining step (b) activation energy (c) transition step (d) product favored step

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Last Answer : Answer : A

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The given figure shows the structure of ne with their parts labelled as A, B & C. Identify A, B and C.

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Identify the components labelled A, B, C and D in the diagram below from the list (i) to (vii) given along with Components : (i) Cristae of mitochondr

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Last Answer : (a) (v) (iv) (viii) (iii)

Transition state structure of the substrate formed during an enzymatic reaction is (a) transient and unstable (b) permanent and stable (c) transient but stable (d) permanent but unstable.

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The diagram given below [Fig. 16.18] shows how things get to and from the liver. They are labelled as A, B, C, D, E and F. Which one of the following

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Which of the following is the correct matchin of the site of action on the given substrate, the enzyme acting state upon it and the end product

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The figure given below show the structure of plasma membrane, with its parts labelled from A to E, Identify the correct :-

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An allosteric enzyme is generally inhibited by (A) Initial substrate of the pathway (B) Substrate analogues (C) Product of the reaction catalysed by allosteric enzyme (D) Product of the pathway

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The figure given below shows a small part of human lung where exchange of gases takes place. In which one of the options given below, the one part, A,

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The king dies and two men, the true heir and an impostor, both claim to be his long-lost son. Both fit the description of the rightful heir: about the right age, height, coloring and general appearance. Finally, one of the elders proposes a test to identify the true heir. One man agrees to the test while the other flatly re-fuses. The one who agreed is immediately sent on his way, and the one who re-fused is correctly identified as the rightful heir. Can you figure out why? -Riddles

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Last Answer : The test was a blood test. The elder remembered that the true prince was a hemophiliac.

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Last Answer : (A) Free energy of activation is lowered in the presence of catalyst, which remains unchanged at the end of reaction

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The excess energy of reactants in a chemical reaction required to dissociate into products is termed as the __________ energy. (A) Activation (B) Potential (C) Binding (D) Threshold

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Last Answer : (A) Activation

An enzyme brings about (A) Decrease in reaction time (B) Increase in reaction time (C) Increase in activation energy (D) Reduction in activation energy

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Last Answer : Answer : D

Enzymes (a protein) are catalysts found in organisms. Its efficiency of catalysing a reaction is due to its capacity to lower the activation energy of the reaction. The enzyme ptyalin used for food digestion is present in (A) Blood (B) Saliva (C) Intestine (D) Gland

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Last Answer : (B) Saliva

Pick out the wrong statement. (A) Catalytic activity of enzyme catalysed reactions which is affected by temperature, pH value & chemical agents, is maximum at a temperature of about 45°C(B) Most of the enzyme catalysed reactions involve at least two substrates (C) Enzymes help in increasing the activation energy of the reaction (D) Equilibrium concentrations in enzyme catalysed reactions can be calculated by using the thermodynamic properties of substrates & prod

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Which one of the following statements regarding a catalyst is not correct? A An enzyme is a catalyst that only binds certain substrates. B An enzyme is a protein that is a highly efficient catalyst for one or more chemical reactions in a living system. C Catalysts increase the rate of a reaction by altering the mechanism, thereby increasing the activation energy. D Catalysts do not alter the equilibrium constant for a chemical reaction.

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Last Answer : C Catalysts increase the rate of a reaction by altering the mechanism, thereby increasing the activation energy.

Examine the given figure and select the correct option giving all the four parts (A, B, C and D) rightly identified. A B C D (a) Archego- Female Gemma Rhizoids niophore thallus cup (b) Archego- Female Bud Foot niophore thallus (c) Seta Sporo- Proto- Rhizoids phyte nema (d) Antherid- Male- Globule Roots iophore thallus

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Last Answer : (a) Archego- Female Gemma Rhizoids niophore thallus cup

Arrhenius equation shows the variation of __________ with temperature. (A) Reaction rate (B) Rate constant (C) Energy of activation (D) Frequency factor

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The energy required to start an enzymatic reaction is called (A) Chemical energy (B) Metabolic energy (C) Activation energy (D) Potential energy

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Pick out the wrong statement. (A) Exit age description function (E) and internal age distribution function (I) are related as, E = -(dI/dθ) (B) Chemisorption studies are useful in the determination of catalyst surface area and pore size distribution (C) A higher temperature favours the reaction of higher activation energy (D) A catalyst increases the potential energy barrier over which the reactants must pass to form products

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What happens when a catalyst is added to a system at equilibrium? A The reaction follows an alternative pathway of lower activation energy. B The heat of reaction decreases. C The potential energy of the reactants decreases. D The potential energy of the products decreases. E The rate of chemical reaction decreases.

Description : What happens when a catalyst is added to a system at equilibrium? A The reaction follows an alternative pathway of lower activation energy. B The heat of reaction decreases. C The potential ... decreases. D The potential energy of the products decreases. E The rate of chemical reaction decreases.

Last Answer : A The reaction follows an alternative pathway of lower activation energy.

A solid created by rotating a planar-shape about an axis is called a “Surface of Revolution”. The figure below shows a shape and the axis of revolution which is used to create such a solid. Which of the options would be the correct top view of this solid?

Description : A solid created by rotating a planar-shape about an axis is called a “Surface of Revolution”. The figure below shows a shape and the axis of revolution which is used to create such a solid. Which of the options would be the correct top view of this solid? 

Last Answer : B

Given below is the ECG of a normal human. Which one of its components is correctly interpreted below? (a) Complex QRS - one complete pulse (b) Peak T - initiation of total cardiac contraction (c) Peak P and peak R together - systolic and diastolic blood pressures (d) Peak P- initiation of left atrial contraction only

Description : Given below is the ECG of a normal human. Which one of its components is correctly interpreted below? (a) Complex QRS - one complete pulse (b) Peak T - initiation of total cardiac ... R together - systolic and diastolic blood pressures (d) Peak P- initiation of left atrial contraction only

Last Answer : (a) Complex QRS - one complete pulse

Template/lock and key theory of enzyme action is supported by (A) Enzymes speed up reaction (B) Enzymes occur in living beings and speed up certain reactions (C) Enzymes determine the direction of reaction (D) Compounds similar to substrate inhibit enzyme activity

Description : Template/lock and key theory of enzyme action is supported by (A) Enzymes speed up reaction (B) Enzymes occur in living beings and speed up certain reactions (C) Enzymes determine the direction of reaction (D) Compounds similar to substrate inhibit enzyme activity

Last Answer : Answer : D

The rate of an enzyme catalyzed reaction was measured using several substrate concentrations that were much lower than Km, the dependence of reaction velocity on substrate concentration can best be described as (A) Independent of enzyme concentration (B) A constant fraction of Vmax (C) Equal to Km (D) Proportional to the substrate concentration

Description : The rate of an enzyme catalyzed reaction was measured using several substrate concentrations that were much lower than Km, the dependence of reaction velocity on substrate concentration can best be ... constant fraction of Vmax (C) Equal to Km (D) Proportional to the substrate concentration

Last Answer : Answer : C

When [s] is equal to Km, which of the following conditions exist? (A) Half the enzyme molecules are bound to substrate (B) The velocity of the reaction is equal to Vmax (C) The velocity of the reaction is independent of substrate concentration (D) Enzyme is completely saturated with substrate

Description : When [s] is equal to Km, which of the following conditions exist? (A) Half the enzyme molecules are bound to substrate (B) The velocity of the reaction is equal to Vmax (C) The velocity of the reaction is independent of substrate concentration (D) Enzyme is completely saturated with substrate

Last Answer : Answer : A

The Michaehis-Menten hypothesis: (A) Postulates the formation of an enzyme substrate complex (B) Enables us to calculate the isoelectric point of an enzyme (C) States that the rate of a chemical reaction may be independent of substrate concentration (D) States that the reaction rate is proportional to substrate concentration

Description : The Michaehis-Menten hypothesis: (A) Postulates the formation of an enzyme substrate complex (B) Enables us to calculate the isoelectric point of an enzyme (C) States that the ... independent of substrate concentration (D) States that the reaction rate is proportional to substrate concentration

Last Answer : Answer : A

If a coenzyme is required in an enzyme reaction, the former usually has the function of (A) Acting as an acceptor for one of the cleavage products of the substrate (B) Enhancing the specificity of the apo enzyme (C) Increasing the number of receptor sites of the apo enzyme (D) Activating the substrate ENZYMES 167

Description : If a coenzyme is required in an enzyme reaction, the former usually has the function of (A) Acting as an acceptor for one of the cleavage products of the substrate (B) Enhancing the specificity ... C) Increasing the number of receptor sites of the apo enzyme (D) Activating the substrate ENZYMES 167

Last Answer : Answer : A

Example of enzyme specificity: (A) Stereo specificity (B) Reaction specificity (C) Substrate specificity(D) All of these

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Last Answer : Answer : D