What is the role of enzymes in biological reactions?

What is the role of enzymes in biological reactions?
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1 Answer

Answer :

A: Enzymes catalyze (speed up) chemical reactions in biological systems.
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What are some biological examples in which lysosomic enzymes play fundamental role ?

Description : What are some biological examples in which lysosomic enzymes play fundamental role ?

Last Answer : The remodelation of the osseous tissue, the function of acrosomes in sperm cells and the elimination of the tadpole tail are examples of biological processes in which lysosomic enzymes are key factors. The ... cell by its own mechanisms is called autolysis, a type of apoptosis (celll suicide).

$ Those enzymes which are active inside a cell are called extra-cellular enzymes. ! Enzymes lower the rate of biological activities.

Description : $ Those enzymes which are active inside a cell are called extra-cellular enzymes. ! Enzymes lower the rate of biological activities.

Last Answer : $ Those enzymes which are active inside a cell are called extra-cellular enzymes. ! Enzymes lower the rate ... wrong D. If both As and R are wrong.

Enzymes, vitamins and hormones can be classified into a single category of biological chemicals, because all of these (a) help in regulating metabolism (b) are exclusively synthesized in the body of a living organism as at present (c) are conjugated proteins (d) enhance oxidative metabolism.

Description : Enzymes, vitamins and hormones can be classified into a single category of biological chemicals, because all of these (a) help in regulating metabolism (b) are exclusively synthesized in the body of a living organism as at present (c) are conjugated proteins (d) enhance oxidative metabolism.

Last Answer : (a) help in regulating metabolism

Define Enzymes. Write biological source, chemical constituents and uses of Papaya.

Description : Define Enzymes. Write biological source, chemical constituents and uses of Papaya. 

Last Answer : Enzymes- Enzymes are the protein substances which act as catalysts in various biochemical reactions Papaya: Biological source: It consist of dried latex obtained by giving incision on unripen fruit of Carica ... skins and hides. 6. It is used in cheese manufacturing ,as a substitute of rennin.

Biological response modifiers like GM-CSF are used in conjunction with anticancer drugs for the following purpose(s): A. To enhance antitumour activity of the drug B. To prevent hypersensitivity reactions to the drug C. To hasten recovery from drug induced myelosuppression D. Both ‘A’ and ‘C’ are correct

Description : Biological response modifiers like GM-CSF are used in conjunction with anticancer drugs for the following purpose(s): A. To enhance antitumour activity of the drug B. To prevent hypersensitivity reactions to ... . To hasten recovery from drug induced myelosuppression D. Both A' and C' are correct

Last Answer : C. To hasten recovery from drug induced myelosuppressio

Can enzymes slow down chemical reactions?

Description : Can enzymes slow down chemical reactions?

Last Answer : Need answer

What is an example enzymes control chemical reactions?

Description : What is an example enzymes control chemical reactions?

Last Answer : Feel Free to Answer

How enzymes speed up catalyze reactions?

Description : How enzymes speed up catalyze reactions?

Last Answer : Feel Free to Answer

What do enzymes do the metabolic reactions?

Description : What do enzymes do the metabolic reactions?

Last Answer : Feel Free to Answer

In conversion of lactic acid to glucose, three reactions of glycolytic pathway are circumvented, which of the following enzymes do not participate? (A) Pyruvate carboxylase (B) Phosphoenol pyruvate carboxy kinase (C) Pyruvate kinase (D) Glucose-6-phosphatase

Description : In conversion of lactic acid to glucose, three reactions of glycolytic pathway are circumvented, which of the following enzymes do not participate? (A) Pyruvate carboxylase (B) Phosphoenol pyruvate carboxy kinase (C) Pyruvate kinase (D) Glucose-6-phosphatase

Last Answer : Answer : B

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

Enzymes increases the rate of reactions by (A) Increasing the free energy of activation (B) Decreasing the energy of activation (C) Changing the equilibrium constant of the reaction (D) Increasing the free energy change of the reaction

Description : Enzymes increases the rate of reactions by (A) Increasing the free energy of activation (B) Decreasing the energy of activation (C) Changing the equilibrium constant of the reaction (D) Increasing the free energy change of the reaction

Last Answer : Answer : B

Enzymes increase the rates of reactions by (A) Increasing the free energy of activation (B) Decreasing the energy of activation (C) Changing the equilibrium constant of the reaction (D) Increasing the free energy change of the reaction

Description : Enzymes increase the rates of reactions by (A) Increasing the free energy of activation (B) Decreasing the energy of activation (C) Changing the equilibrium constant of the reaction (D) Increasing the free energy change of the reaction

Last Answer : Answer : B

Enzymes accelerate the rate of reactions by (A) Increasing the equilibrium constant of reactions (B) Increasing the energy of activation (C) Decreasing the energy of activation (D) Decreasing the free energy change of the reaction

Description : Enzymes accelerate the rate of reactions by (A) Increasing the equilibrium constant of reactions (B) Increasing the energy of activation (C) Decreasing the energy of activation (D) Decreasing the free energy change of the reaction

Last Answer : Answer : C

Isoenzymes are (A) Chemically, immunologically and electrophoretically different forms of an enzyme (B) Different forms of an enzyme similar in all properties (C) Catalysing different reactions (D) Having the same quaternary structures like the enzymes

Description : Isoenzymes are (A) Chemically, immunologically and electrophoretically different forms of an enzyme (B) Different forms of an enzyme similar in all properties (C) Catalysing different reactions (D) Having the same quaternary structures like the enzymes

Last Answer : Answer : A

The carbon chain of fatty acids is shortened by 2 carbon atoms at a time. This involves successive reactions catalysed by 4-enzymes. These act the following order: (A) Acetyl CoA dehydrogenase, β-OH acyl CoA dehydrogenase, enoyl hydrase, thiolose (B) Acyl CoA dehydrogenase, thiolase, enoyl hydrase, β-OH acyl CoA dehydrogenase (C) Acyl CoA dehydrogenase, thiolose, enoyl hydrase, β-OH acyl CoA dehydrogenase (D) Enoyl hydrase, β-OH acyl CoA dehydrogenase, acyl CoA dehydrogenase, thiolose,

Description : The carbon chain of fatty acids is shortened by 2 carbon atoms at a time. This involves successive reactions catalysed by 4-enzymes. These act the following order: (A) Acetyl CoA dehydrogenase, ... CoA dehydrogenase (D) Enoyl hydrase, β-OH acyl CoA dehydrogenase, acyl CoA dehydrogenase, thiolose,

Last Answer : Answer : B

Proteinous substances which catalyze biochemical reactions are known as (A) Activators (B) Catalysts (C) Enzymes (D) Hormones

Description : Proteinous substances which catalyze biochemical reactions are known as (A) Activators (B) Catalysts (C) Enzymes (D) Hormones

Last Answer : Answer : C

In conversion of Lactic acid to Glucose, three reactions of Glycolytic pathway are circumvented, which of the following enzymes do not participate? (A) Pyruvate Carboxylase (B) Phosphoenol pyruvate carboxy kinase (C) Pyruvate kinase (D) Glucose-6-phosphatase

Description : In conversion of Lactic acid to Glucose, three reactions of Glycolytic pathway are circumvented, which of the following enzymes do not participate? (A) Pyruvate Carboxylase (B) Phosphoenol pyruvate carboxy kinase (C) Pyruvate kinase (D) Glucose-6-phosphatase

Last Answer : C

Which of the following enzymes is ultimately responsible for the production of prostaglandins associated with inflammatory reactions? (a) Phospholipase (b) Lipoxygenase (c) Cyclooxygenase-I (d) Cyclooxygenase II (e) Xanthine oxidase

Description : Which of the following enzymes is ultimately responsible for the production of prostaglandins associated with inflammatory reactions? (a) Phospholipase (b) Lipoxygenase (c) Cyclooxygenase-I (d) Cyclooxygenase II (e) Xanthine oxidase

Last Answer : Ans: D

Arrhenius equation K = Ae-E a / R T In some reactions, Rate of reaction is directly proportional to. Concentration of catalyst Catalyst used in Bio-Chemical reactions is called. Enzymes Reactions catalyzed by light are called as. Photo catalyzed or Photosensitised reactions

Description : Arrhenius equation K = Ae-E a / R T In some reactions, Rate of reaction is directly proportional to. Concentration of catalyst Catalyst used in Bio-Chemical reactions is called. Enzymes Reactions catalyzed by light are called as. Photo catalyzed or Photosensitised reactions

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The reactions of the extracellular digestion are hydrolysis reactions, i.e., breaking of molecules with the help of water. The enzymes that participate in digestion are hydrolytic enzymes.

Description : The reactions of the extracellular digestion are hydrolysis reactions, i.e., breaking of molecules with the help of water. The enzymes that participate in digestion are hydrolytic enzymes.

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Give some examples of co-enzymes involved in reactions other than hydrogen transfer.

Description : Give some examples of co-enzymes involved in reactions other than hydrogen transfer.

Last Answer : Thiamine pyrophosphate, pyridoxal phosphate, biotin, co-enzyme A, ATP.

Prosthetic groups differ from co-enzymes in that (a) they require metal ions for their activity (b) they (prosthetic groups) are tightly bound to apoenzymes (c) their association with apoenzymes is transient (d) they can serve as co-factors in a number of enzyme-catalyzed reactions.

Description : Prosthetic groups differ from co-enzymes in that (a) they require metal ions for their activity (b) they (prosthetic groups) are tightly bound to apoenzymes (c) their association with apoenzymes is transient (d) they can serve as co-factors in a number of enzyme-catalyzed reactions.

Last Answer : (b) they (prosthetic groups) are tightly bound to apoenzymes

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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Last Answer : (C) Enzymes help in increasing the activation energy of the reaction

What are enzymes? (a) saccharides that catalyze chemical reactions (b) unsaturated fats that catalyze chemical reactions (c) DNA molecules that catalyze chemical reactions (d) proteins that catalyze chemical reactions

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Enzymes are organic catalysts used in the __________ reactions. (A) Chemical (B) Biochemical (C) Photochemical (D) Electrochemical

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Enzymes are(A) Proteins with high molecular weight (around 10,000)(B) Derived from living organisms(C) Catalyst for temperature sensitive reactions(D) All (A), (B) and (C)

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Last Answer : (D) All (A), (B) and (C)

Organic molecules that increase the rate of metabolic reactions with themselveschangingareknown as A- coenzymes B- enzymes C- substrates D- .reactants

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Last Answer : enzymes

Isozymes or iso enzymes are those enzyme which A- have same structural forms B- have different structural forms but identical catalytic properties C- catalyses oxidation reactions D- none of these

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What is needed in order for reactions to occur at body temperatures? a. buffers b. acids c. bases d. enzymes

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Explain how enzymes speed up chemical reactions.

Description : Explain how enzymes speed up chemical reactions.

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How do numbers play a role in biological design?

Description : How do numbers play a role in biological design?

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Which one of the following mineral elements play an important role in biological nitrogen fixation a. Copper b. Magnesium c. Zinc d. Molybdenum

Description : Which one of the following mineral elements play an important role in biological nitrogen fixation a. Copper b. Magnesium c. Zinc d. Molybdenum

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What are some examples of biological activities in which osmosis plays important role ?

Description : What are some examples of biological activities in which osmosis plays important role ?

Last Answer : Hemolysis (destruction of red blood cells) by entrance of water, the hydric regulation in plants and the entrance of water in the xylem of vascular plants are all examples of biological phenomena caused by ... of water in plant roots since root cells are hypertonic in comparison to the soil.

Niche is (a) all the biological factors in the organism’s environment (b) the physical space where an organism lives (c) the range of temperature that the organism needs to live (d) the functional role played by the organism where it lives.

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Which of the following elements plays an important role in biological nitrogen fixation? (a) Copper (b) Molybdenum (c) Zinc (d) Manganese

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How do the lipids differ from the other organic compounds? a. They are the largest organic compounds. b. They are nonpolar compounds. c. They have no biological role. d. They are not used for energy storage.

Description : How do the lipids differ from the other organic compounds? a. They are the largest organic compounds. b. They are nonpolar compounds. c. They have no biological role. d. They are not used for energy storage.

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Niche is (1) all the biological factors in the organism environment (2) the physical space where an organism live (3) the range of temperature that the organism needs to live (4) the functional role played by the organism where it lives

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Which one of the following is not a matter a global concern in the removal of tropical forests ? (A) Their ability to absorb the chemicals that contribute to depletion of ozone layer. (B) Their role in maintaining the oxygen and carbon balance of the earth. (C) Their ability to regulate surface and air temperatures, moisture content and reflectivity. (D) Their contribution to the biological diversity of the planet.

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State the role of the following in human digestive system : (i) Digestive enzymes (ii) Hydrochloric acid (iii) Villi -Biology

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Role of enzymes in metabolism. -Biology

Description : Role of enzymes in metabolism. -Biology

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Role of restriction enzymes and DNA ligase -Biology

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What role do restriction enzymes play in analysis of Edna?

Description : What role do restriction enzymes play in analysis of Edna?

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What is the role of digestive enzymes and the factors that affect their function?

Description : What is the role of digestive enzymes and the factors that affect their function?

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An important function of vitamin A is (A) To act as coenzyme for a few enzymes (B) To play an integral role in protein synthesis (C) To prevent hemorrhages (D) To maintain the integrity of epithelial tissue

Description : An important function of vitamin A is (A) To act as coenzyme for a few enzymes (B) To play an integral role in protein synthesis (C) To prevent hemorrhages (D) To maintain the integrity of epithelial tissue

Last Answer : Answer : D

What might be the consequence and role of compartmentation of enzymes?

Description : There are two forms of the enzyme carbamyl phosphate synthetase, one in the mitochondrial matrix and the other in the cytoplasm. What might be the consequence and role of this compartmentation of enzymes?

Last Answer : It enables separate control over the rates of urea and pyrimidine synthesis  

The diagram represents a section through the small intestine.What is the role of the structure labelled X ? (a) They secrete enzymes for digestion (b) They secrete hormones (c) They decrease the surface area of absorption (d) They increase the surface area of absorption

Description : The diagram represents a section through the small intestine.What is the role of the structure labelled X ? (a) They secrete enzymes for digestion (b) They secrete hormones (c) They decrease the surface area of absorption (d) They increase the surface area of absorption

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The major role of minor elements inside living organisms is to act as (a) co-factors of enzymes (b) building blocks of important amino acids (c) constituent of hormones (d) binder of cell structure.

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