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

Proteinous substances which catalyze biochemical reactions are known as (A) Activators (B) Catalysts (C) Enzymes (D) Hormones
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Enzymes are organic catalysts used in the __________ reactions. (A) Chemical (B) Biochemical (C) Photochemical (D) Electrochemical

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

Last Answer : (B) Biochemical

Organic catalysts differ from the inorganic catalyst in the sense that the former is (A) Active at cryogenic temperatures only (B) Prohibitively costly (C) Proteinous in nature (D) Active at very high temperature only

Description : Organic catalysts differ from the inorganic catalyst in the sense that the former is (A) Active at cryogenic temperatures only (B) Prohibitively costly (C) Proteinous in nature (D) Active at very high temperature only

Last Answer : (C) Proteinous in nature

How enzymes speed up catalyze reactions?

Description : How enzymes speed up catalyze reactions?

Last Answer : Feel Free to Answer

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

Description : 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

Last Answer : proteins that catalyze chemical reactions

Hormone receptors that stimulate cAMP production (A) are part of a complex of two proteins that transform the external signal into internal cAMP production (B) are proteins distinct and separate from those that catalyze the production of cAMP (C) cause release of the catalytic subunit upon binding of the hormone (D) are not very specific and bind a number of different hormones

Description : Hormone receptors that stimulate cAMP production (A) are part of a complex of two proteins that transform the external signal into internal cAMP production (B) are proteins distinct and separate from those ... binding of the hormone (D) are not very specific and bind a number of different hormones

Last Answer : Answer : B

Which one of the following statements is not characteristic of allosteric enzymes? (A) They frequently catalyze a committed step early in a metabolic pathway (B) They are often composed of subunits (C) They follow Michaelis-Menten kinetics (D) They frequently show cooperativity for substrate binding

Description : Which one of the following statements is not characteristic of allosteric enzymes? (A) They frequently catalyze a committed step early in a metabolic pathway (B) They are often composed of subunits (C) They follow Michaelis-Menten kinetics (D) They frequently show cooperativity for substrate binding

Last Answer : Answer : C

Which of the following is not true regarding enzymes? (A) They catalyze only a particular type of reaction (B) They remain active even after separation from the source (C) They are destroyed after the completion of the reaction they catalyse (D) They are irreversibly destroyed at high temperature (E) Their activity depends on the pH of the solution

Description : Which of the following is not true regarding enzymes? (A) They catalyze only a particular type of reaction (B) They remain active even after separation from the source (C) They are destroyed ... They are irreversibly destroyed at high temperature (E) Their activity depends on the pH of the solution

Last Answer : Answer : C

For biosynthesis of proteins (A) Amino acids only are required (B) Amino acids and nucleic acids only are required (C) Amino acid, nucleic acids and ATP only are required (D) Amino acids, nucleic acids, ATP, GTP, enzymes and activators are required

Description : For biosynthesis of proteins (A) Amino acids only are required (B) Amino acids and nucleic acids only are required (C) Amino acid, nucleic acids and ATP only are required (D) Amino acids, nucleic acids, ATP, GTP, enzymes and activators are required

Last Answer : Answer : D

20. Which one of the following statements is incorrect about enzyme catalysis? (1) Enzymes are least reactive at optimum temperature (2) Enzymes are mostly proteinous in nature (3) Enzyme action is specific (4) Enzymes are denaturated by ultraviolet rays and at high temperature

Description : 20. Which one of the following statements is incorrect about enzyme catalysis? (1) Enzymes are least reactive at optimum temperature (2) Enzymes are mostly proteinous in nature (3) Enzyme action is specific (4) Enzymes are denaturated by ultraviolet rays and at high temperature

Last Answer : Enzymes are least reactive at optimum temperature

Name three biochemical catalysts found in the human body.

Description : Name three biochemical catalysts found in the human body. 

Last Answer : Solution: Biochemical catalysts found in the human body are: 1. Pepsin 2. Trypsin 3. Lipase.

Which is not true about inorganic catalysts and enzymes? (A) They are specific (B) Inorganic catalysts require specific not needed by enzymes (C) They are sensitive to pH (D) They speed up the rate of chemical reaction

Description : Which is not true about inorganic catalysts and enzymes? (A) They are specific (B) Inorganic catalysts require specific not needed by enzymes (C) They are sensitive to pH (D) They speed up the rate of chemical reaction

Last Answer : Answer : B

Enzymes are different from catalysts in (A) Being proteinaceous (B) Not used up in reaction (C) Functional at high temperature (D) Having high rate of diffusion

Description : Enzymes are different from catalysts in (A) Being proteinaceous (B) Not used up in reaction (C) Functional at high temperature (D) Having high rate of diffusion

Last Answer : Answer : A

Name the type of proteins that work to catalyze metabolic reactions or can modify other proteins to switch their activity on or off.

Description : Name the type of proteins that work to catalyze metabolic reactions or can modify other proteins to switch their activity on or off.

Last Answer : Enzymes

Which one of the following pairs of chemical substances, is correctly categorised? (a) Calcitonin and thymosin - Thyroid hormones (b) Pepsin and prolactin - Two digestive enzymes secreted in stomach (c) Troponin and myosin - Complex proteins in striated muscles (d) Secretin and rhodopsin - Polypeptide hormones

Description : Which one of the following pairs of chemical substances, is correctly categorised? (a) Calcitonin and thymosin - Thyroid hormones (b) Pepsin and prolactin - Two digestive enzymes secreted in ... and myosin - Complex proteins in striated muscles (d) Secretin and rhodopsin - Polypeptide hormones

Last Answer : (c) Troponin and myosin - Complex proteins in striated muscles

PH is the negative logarithm of the hydrogen Ion Concentration express4ed in moles/liter of aqueous solution. PH of buffer solution is calculated by. Henderson’s equation Name the best indicator Phenolphthalein, PH range 8.3 to 10.0 Chemical kinetics deals with study of. Rates and mechanisms of chemical and Biochemical reactions

Description : PH is the negative logarithm of the hydrogen Ion Concentration express4ed in moles/liter of aqueous solution. PH of buffer solution is calculated by. Henderson's equation Name the best ... Chemical kinetics deals with study of. Rates and mechanisms of chemical and Biochemical reactions

Last Answer : What does Thermodynamics helps in predicting ?

Substances that cause a reaction to occur or proceed at a different rate without the reaction itself being affected are called - (1) Catalysts (2) Hydrocarbons (3) Oxidising agents (4) Substitutes

Description : Substances that cause a reaction to occur or proceed at a different rate without the reaction itself being affected are called - (1) Catalysts (2) Hydrocarbons (3) Oxidising agents (4) Substitutes

Last Answer : (1) Catalysts Explanation: Catalysts are substances that cause a reaction to occur or proceed at a different rate without the reaction itself being affected. Eg: hydrogenation of vegetable oils using a nickel catalyst.

Enzymes and catalysts similarities -Biology

Description : Enzymes and catalysts similarities -Biology

Last Answer : answer:

Fermentation is a process of decomposition of an organic compound by (1) catalysts (2) enzymes (3) carbanions (4) free radicals

Description : Fermentation is a process of decomposition of an organic compound by (1) catalysts (2) enzymes (3) carbanions (4) free radicals

Last Answer : (2) enzymes Explanation: Fermentation in food processing typically is the conversion of carbohydrates to alcohols and carbon dioxide or organic acids using yeasts, bacteria, or a combination there ... to lactic acid. Alcoholic fermentation follows the same enzymatic pathway for the first 10 steps.

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

Description : 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

Last Answer : (B) Saliva

Pick out the wrong statement. (A) ****, *** & Vodka are prepared by the formulation of fruit juice, sugar beet & rye respectively (B) Protein catalysts are called enzymes (C) The rate of chemical reaction is independent of the concentration of reactants at high concentration of enzymes (D) Total sugar content in molasses is about 10%

Description : Pick out the wrong statement. (A) Wine, rum & Vodka are prepared by the formulation of fruit juice, sugar beet & rye respectively (B) Protein catalysts are called enzymes (C) The rate ... concentration of reactants at high concentration of enzymes (D) Total sugar content in molasses is about 10%

Last Answer : (D) Total sugar content in molasses is about 10%

Fermentation is a process of decomposition of an organic compound by : (1) catalysts (2) enzymes (3) carbanions (4) free radicals

Description : Fermentation is a process of decomposition of an organic compound by : (1) catalysts (2) enzymes (3) carbanions (4) free radicals

Last Answer : enzymes

What is the relationship between catalysts and the collision theory of reactions?

Description : What is the relationship between catalysts and the collision theory of reactions?

Last Answer : Perhaps you should attend your classes, instead of trying to get us to do your homework? It seems like every single question that you ask is homework based. If you honestly do not understand the material, talk to the teacher. Talk to other people in your class. Read the textbook. STOP asking us.

What organic molecule function as a catalysts for chemical reactions in living organisms?

Description : What organic molecule function as a catalysts for chemical reactions in living organisms?

Last Answer : They are called enzymes, but there a probably billions of different enzymes. They are built from protein molecules decorated with sugars and sometimes include one or more metal atoms at their "active" site.

In autocatalytic reactions, (A) One of the reactants acts as a catalyst (B) One of the products acts as a catalyst (C) Catalysts have very high selectivity (D) No catalyst is used

Description : In autocatalytic reactions, (A) One of the reactants acts as a catalyst (B) One of the products acts as a catalyst (C) Catalysts have very high selectivity (D) No catalyst is used

Last Answer : (B) One of the products acts as a catalyst

. Photo-chemical reactions occur in presence of (A) Sunlight (B) Darkness (C) Solid catalysts (D) Monochromatic radiation only

Description : . Photo-chemical reactions occur in presence of (A) Sunlight (B) Darkness (C) Solid catalysts (D) Monochromatic radiation only

Last Answer : (A) Sunlight

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.

Description : 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 ... increasing the activation energy. D Catalysts do not alter the equilibrium constant for a chemical reaction.

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

STAT proteins are (A) Thermostat proteins of brain (B) Glucostat proteins of hepatocyte cell membrane (C) Short term activators of translation (D) Signal transduction and activators of transcription

Description : STAT proteins are (A) Thermostat proteins of brain (B) Glucostat proteins of hepatocyte cell membrane (C) Short term activators of translation (D) Signal transduction and activators of transcription

Last Answer : Answer : D

What are the activators of phospho fructo kinase?

Description : What are the activators of phospho fructo kinase?

Last Answer : AMP, Fructose-2,6-bisphosphate, Fructose-6- phosphate.

Using X-ray crystallography, this woman scientist determined the structures of large biochemical molecules, including penicillin in 1949 and vitamin B12 in 1956. In 1969 she determined the three dimensional structure of insulin. In 1964 she was awarded the Nobel Prize in chemistry "for her determination by X-ray techniques of the structures of important biochemical substances." Name this woman scientist.

Description : Using X-ray crystallography, this woman scientist determined the structures of large biochemical molecules, including penicillin in 1949 and vitamin B12 in 1956. In 1969 she determined the three ... X-ray techniques of the structures of important biochemical substances." Name this woman scientist.

Last Answer : ANSWER: (DOROTHY) CROWFOOT HODGKIN

Genes control (a) Protein synthesis but not heredity (b) Protein synthesis and heredity (c) Heredity but not protein synthesis (d) Biochemical reaction of some enzymes

Description : Genes control (a) Protein synthesis but not heredity (b) Protein synthesis and heredity (c) Heredity but not protein synthesis (d) Biochemical reaction of some enzymes

Last Answer : Ans:(b)

Water is a universal solvent for what reactions? A. Physical B. Nuclear C. Chemical D. Biochemical

Description : Water is a universal solvent for what reactions? A. Physical B. Nuclear C. Chemical D. Biochemical

Last Answer : ANSWER: D

Water is a universal solvent for what reactions? A. Physical B. Nuclear C. Chemical D. Biochemical

Description : Water is a universal solvent for what reactions? A. Physical B. Nuclear C. Chemical D. Biochemical

Last Answer : ANSWER: D

Water is a universal solvent for what reactions? A. Chemical B. Biochemical (Answer) C. Physica

Description : Water is a universal solvent for what reactions? A. Chemical B. Biochemical (Answer) C. Physical

Last Answer : B. Biochemical (Answer)

Cells must constantly manage metabolic pathways, and this is often done by balancing specific biochemical reactions within a pathway. For example, the metabolic product of one pathway may block the formation of that specific metabolite at an earlier point in the pathway to prevent a buildup of that specific product. What is this process called?

Description : Cells must constantly manage metabolic pathways, and this is often done by balancing specific biochemical reactions within a pathway. For example, the metabolic product of one pathway may block the formation ... the pathway to prevent a buildup of that specific product. What is this process called?

Last Answer : Feedback inhibition

Metabolism is carried out by a large class of proteins that decrease the activation energy required for chemical reactions inside a cell. Therefore they only facilitate reactions that would naturally occur at a much slower rate. What is the name of these proteins that speed up biochemical reactions?

Description : Metabolism is carried out by a large class of proteins that decrease the activation energy required for chemical reactions inside a cell. Therefore they only facilitate reactions that would naturally occur at a much slower rate. What is the name of these proteins that speed up biochemical reactions?

Last Answer : Enzymes

Hormones (A) Act as coenzyme (B) Act as enzyme (C) Influence synthesis of enzymes (D) Belong to B-complex group

Description : Hormones (A) Act as coenzyme (B) Act as enzyme (C) Influence synthesis of enzymes (D) Belong to B-complex group

Last Answer : Answer : C

Enzymes, vitamins and hormones are common in (A) Being proteinaceous (B) Being synthesized in the body of organisms (C) Enhancing oxidative metabolism (D) Regulating metabolism

Description : Enzymes, vitamins and hormones are common in (A) Being proteinaceous (B) Being synthesized in the body of organisms (C) Enhancing oxidative metabolism (D) Regulating metabolism

Last Answer : Answer : D

The harmful substances produced by the microbes are known as – (1) Antibiotics (2) Pollutants (3) Hormones (4) Toxins

Description : The harmful substances produced by the microbes are known as – (1) Antibiotics (2) Pollutants (3) Hormones (4) Toxins

Last Answer : (4) Toxins Explanation: Toxins are substances created by plants and animals that are poisonous to humans. Most toxins that cause problems in humans are released by microor-ganisms such as bacteria, viruses, fungi, rickettsiae or protozoa. For example, cholera is due to a bacterial toxin.

The harmful substances produced by the microbes are known as (1) Antibiotics (2) Pollutants (3) Hormones (4) Toxins

Description : The harmful substances produced by the microbes are known as (1) Antibiotics (2) Pollutants (3) Hormones (4) Toxins

Last Answer : Toxins

what enzyme is needed to catalyze synthesis of mRNA?

Description : what enzyme is needed to catalyze synthesis of mRNA?

Last Answer : Helicase. It breaks the hydrogen bonds holding the complementary bases of DNA together (A with T, C with G). The separation of the two single strands of DNA creates a Y' shape called a replication fork ... , is the leading strand. The other oriented in the 5' to 3' direction is the lagging strand.

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

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

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

Last Answer : Define order of reaction

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.