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

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
by

1 Answer

Answer :

(B) Saliva
by

Related questions

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.

The saliva pH is approximately 6.8. It is thus a slightly acid pH. Saliva lubricates the food bolus and initiates the enzymatic extracellular digestion of food. It also works as a buffer for the mouth pH and it has an important role of having IgA antibodies (also present in tears, colostrum, mother’s milk and in the mucosae of the intestine and airways) that protect the organism against pathogens.

Description : The saliva pH is approximately 6.8. It is thus a slightly acid pH. Saliva lubricates the food bolus and initiates the enzymatic extracellular digestion of food. It also works as a buffer for the ... 's milk and in the mucosae of the intestine and airways) that protect the organism against pathogens.

Last Answer : What is the salivary digestive enzyme? Which type of food does it digest and into which smaller molecules does it transform the food?

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 catalytic activity of enzymes is due to their capacity to lower the __________ energy. (A) Activation (B) Potential (C) Kinetic (D) None of these

Description : The catalytic activity of enzymes is due to their capacity to lower the __________ energy. (A) Activation (B) Potential (C) Kinetic (D) None of these

Last Answer : (A) Activation

Ptyalin, an enzyme work in saliva in -

Description : Ptyalin, an enzyme work in saliva in -

Last Answer : Ptyalin, an enzyme work in saliva in - A. Alkaline medium B. almost neutral medium C. Acidic medium D. All media

Which of the following is incorrect about heterogeneous catalysis? a. The most effective catalysts are those which have small surface area b. Seperation of catlyst is easy c. Increase in the rate of reaction is due to decrease in the activation energy d. It is based upon the phenomenon of adsorption

Description : Which of the following is incorrect about heterogeneous catalysis? a. The most effective catalysts are those which have small surface area b. Seperation of catlyst is easy c. Increase in the rate of reaction is due to decrease in the activation energy d. It is based upon the phenomenon of adsorption

Last Answer : a. The most effective catalysts are those which have small surface area

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%

Pick out the wrong statement. (A) Use of different catalysts in a reversible catalytic chemical reaction does not change the equilibrium composition (B) Alumina is added as a promoter to iron catalyst in ammonia synthesis reaction (C) Activation energy for a reaction is obtained from the intercept of the Arrhenius plot (D) Presence of inerts affects the equilibrium conversion of reactants in a chemical reaction

Description : Pick out the wrong statement. (A) Use of different catalysts in a reversible catalytic chemical reaction does not change the equilibrium composition (B) Alumina is added as a promoter to ... Arrhenius plot (D) Presence of inerts affects the equilibrium conversion of reactants in a chemical reaction

Last Answer : (C) Activation energy for a reaction is obtained from the intercept of the Arrhenius plot

The catalytic power of enzymes is due to (a) the presence of amino acids in their structures (b) their high molecular weight (c) their ability to lower the activation energy of the reaction (d) their limited solubility in water and other solvents

Description : The catalytic power of enzymes is due to (a) the presence of amino acids in their structures (b) their high molecular weight (c) their ability to lower the activation energy of the reaction (d) their limited solubility in water and other solvents

Last Answer : Ans:(c)

Ptyalin is found in (a) Secretin (b) Saliva (c) Satity centre (d) All

Description : Ptyalin is found in (a) Secretin (b) Saliva (c) Satity centre (d) All

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

Description : 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 ... in enzyme catalysed reactions can be calculated by using the thermodynamic properties of substrates & prod

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

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

Last Answer : (d) They increase the surface area of absorption

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

The salivary gland secrete saliva that contains which enzyme? -Do You Know?

Description : The salivary gland secrete saliva that contains which enzyme? -Do You Know?

Last Answer : answer:

The salivary gland secrete saliva that contains which enzyme?

Description : The salivary gland secrete saliva that contains which enzyme?

Last Answer : Ptyalin

1. The salivary gland secrete saliva that contains which enzyme? 2. What does the power of judicial review ensure? 3. Total internal reflection can take place when light travels from which thing? 4. Which country has the largest known reserves of oil? 5. The temples built during the medieval period by which dynasty are known as 'Seven Pagodas' ?

Description : 1. The salivary gland secrete saliva that contains which enzyme? 2. What does the power of judicial review ensure? 3. Total internal reflection can take place when light travels from which thing? 4. ... population? 20. Akbar founded his own religion known as Din-i-Ilahi' what was its mean?

Last Answer : Answer : 1 1. Ptyalin 2. The constitutionality of laws 3. Diamond to glass 4. Kuwait 5. Pallavas 6. Remain constant 7. Aryabhatta 8. Glucose 9. Wegener 10. Alauddin Khalji 11. 73rd 12. ... Dadabhai Naoroji 17. Fallopian tube 18. Ashok Mehta Committee 19. Australia, Canada and Sweden 20. Divine faith

Besides being fundamental for the activation of the main gastric digestive enzyme how does HCl also directly participate in digestion?

Description : Besides being fundamental for the activation of the main gastric digestive enzyme how does HCl also directly participate in digestion?

Last Answer : With its corrosive effect, HCl also helps the rupture of the adhesion between food particles, facilitating the digestive process.

Enzymes combine with a ___________at the___________ site to lower the activation energy. a. Substrate; Active b. Product; Noncompetitive c. Product; Active d. Coenzyme; Active

Description : Enzymes combine with a ___________at the___________ site to lower the activation energy. a. Substrate; Active b. Product; Noncompetitive c. Product; Active d. Coenzyme; Active

Last Answer : a. Substrate; Active

Name the enzyme present in human saliva. What type of food material is digested by this enzyme ? -Science

Description : Name the enzyme present in human saliva. What type of food material is digested by this enzyme ? -Science

Last Answer : Salivary amylase is present in human saliva. It digests starch. Which of the organs perform the following functions in humans ? (i) Absorption of food (ii) Absorption of water

Boron in green plants assists in (a) activation of enzymes (b) acting as enzyme co-factor (c) photosynthesis (d) sugar transport.

Description : Boron in green plants assists in (a) activation of enzymes (b) acting as enzyme co-factor (c) photosynthesis (d) sugar transport.

Last Answer : (d) sugar transport.

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

Protein digestion start from (a) Buccal cavity (b) Stomach (c) Intestine (d) None

Description : Protein digestion start from (a) Buccal cavity (b) Stomach (c) Intestine (d) None

Last Answer : (b) Stomach

Some proteolytic enzymes are (C.P.M.T. 77) (a) Trypsin, peptidase, pepsin (b) Amylopsin, steapsin, ptyalin (c) Amylase, lipase, zymase (d) Urease, zymase, dehydrogenase

Description : Some proteolytic enzymes are (C.P.M.T. 77) (a) Trypsin, peptidase, pepsin (b) Amylopsin, steapsin, ptyalin (c) Amylase, lipase, zymase (d) Urease, zymase, dehydrogenase

Last Answer : (a) Trypsin, peptidase, pepsin

Which one of the following does not secrete any digestive enzyme? (1) Liver (2) Salivary gland (3) Glands of small intestine (4) Pancreas

Description : Which one of the following does not secrete any digestive enzyme? (1) Liver (2) Salivary gland (3) Glands of small intestine (4) Pancreas

Last Answer : (1) Liver Explanation: Digestive enzymes are enzymes that break down polymeric macromolecules into their smaller building blocks, in order to facilitate their absorption by the body. Digestive enzymes are ... (small and large) secretions, or as part of the lining of the gastrointestinal tract.

Which one of the following does not secrete any digestive enzyme? (1) Liver (2) Salivary gland (3) Glands of small intestine (4) Pancreas

Description : Which one of the following does not secrete any digestive enzyme? (1) Liver (2) Salivary gland (3) Glands of small intestine (4) Pancreas

Last Answer : Liver

What is saliva? State its role in the digestion of food -Biology

Description : What is saliva? State its role in the digestion of food -Biology

Last Answer : Saliva is a watery fluid secreted by the salivary glands in the mouth. The digestive functions of saliva include moistening food, and helping to create a food bolus, so it can be swallowed easily. Saliva contains the enzyme amylase that breaks some starches down into maltose and dextrin.

Which one of the following statements is true regarding digestion and absorption of food in humans? (a) Fructose and amino acids are absorbed through intestinal mucosa with the help of carrier ions like Na+. (b) Chylomicrons are small lipoprotein particles that are transported from intestine into blood capillaries. (c) About 60% of starch is hydrolysed by salivary amylase in our mouth. (d) Oxyntic cells in our stomach secrete the proenzyme pepsinogen.

Description : Which one of the following statements is true regarding digestion and absorption of food in humans? (a) Fructose and amino acids are absorbed through intestinal mucosa with the help of carrier ions ... amylase in our mouth. (d) Oxyntic cells in our stomach secrete the proenzyme pepsinogen.

Last Answer : (a) Fructose and amino acids are absorbed through intestinal mucosa with the help of carrier ions like Na

Intestinal villi are numerous and larger in posterior part of small intestine because (a) Digestion is faster in posterior part (b) Blood supply is poor in anterior part (c) Blood supply is poor in posterior part. (d) There is more digested food in posterior part

Description : Intestinal villi are numerous and larger in posterior part of small intestine because (a) Digestion is faster in posterior part (b) Blood supply is poor in anterior part (c) Blood supply is poor in posterior part. (d) There is more digested food in posterior part

Last Answer : (d) There is more digested food in posterior part

Trichloroacetic acid, a strong acid, has been used by dentists for chemical cautery of hypertrophic tissue and aphthous ulcers; its mechanism of action is, BOUCHERS P 194 A. Thermodynamic action B. Activation of tissue enzymes C. Osmotic pressure D. Protein precipitation (PPT) E. Neutralization

Description : Trichloroacetic acid, a strong acid, has been used by dentists for chemical cautery of hypertrophic tissue and aphthous ulcers; its mechanism of action is, BOUCHERS P 194 A. Thermodynamic ... Activation of tissue enzymes C. Osmotic pressure D. Protein precipitation (PPT) E. Neutralization

Last Answer : D. Protein precipitation (PPT)

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

What is the role of saliva in the digestion of food? -Biology

Description : What is the role of saliva in the digestion of food? -Biology

Last Answer : When we eat something we like, our mouth ‘waters’. This is actually not only water, but also a fluid called saliva secreted by the salivary glands. Another aspect of the food we ... The food is mixed thoroughly with saliva and moved around the mouth while chewing by the muscular tongue.

What is the role of saliva in the digestion of food ? -Biology

Description : What is the role of saliva in the digestion of food ? -Biology

Last Answer : aliva contains salivary amylase enzyme that breaks down starch into sugars like maltose. Saliva keeps the mouth cavity clean and moistens the food that help in chewing and breaking down the big pieces of food into smaller ones.

Only two of the following Statements accurately describe what happens in the mouth. 1. 2. 3. 4. Amylase breaks down large starch molecules into smaller maltose molecules. Chewing increases the surface area of food for digestion. Saliva emulsifies fats into smaller droplets. Teeth breakup large insoluble molecules into smaller soluble molecules which statements are correct? (a) 1 and 2 (b) 2 and 3 (c) 3 and 4 (d) 1 and 4

Description : Only two of the following Statements accurately describe what happens in the mouth. 1. 2. 3. 4. Amylase breaks down large starch molecules into smaller maltose molecules. Chewing increases the surface area of food for digestion. Saliva emulsifies ... ? (a) 1 and 2 (b) 2 and 3 (c) 3 and 4 (d) 1 and 4

Last Answer : (a) 1 and 2

Ptyalin is an enzyme of

Description : Ptyalin is an enzyme of

Last Answer : Ptyalin is an enzyme of A. Salivary juice B. Pancreatic juice C. Intestinal juice D. None of these

Ptyalin is an enzyme produced in the

Description : Ptyalin is an enzyme produced in the

Last Answer : Salivary glands

If the stomach did not produce any hydrochloric acid, which enzyme will not function? (1) Ptyalin (2) Rennin (3) Pepsin (4) Lipase

Description : If the stomach did not produce any hydrochloric acid, which enzyme will not function? (1) Ptyalin (2) Rennin (3) Pepsin (4) Lipase

Last Answer : (3) Pepsin Explanation: Hydrochloric acid converts pepsinogen into an enzyme called pepsin. When food enters the stomach, hydrochloric acid production increases and the pH may fall to as low as 1 or 2, a very acidic condition.

Ptyalin is an enzyme produced in the?

Description : Ptyalin is an enzyme produced in the?

Last Answer : salivary glands

The enzyme which can act in Acidic and basic media both (a) Lipase (b) Trypsin (c) Pepsin (d) Ptyalin

Description : The enzyme which can act in Acidic and basic media both (a) Lipase (b) Trypsin (c) Pepsin (d) Ptyalin

Last Answer : (d) Ptyalin

Enzymes and catalysts similarities -Biology

Description : Enzymes and catalysts similarities -Biology

Last Answer : answer:

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

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.

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

After digestion the next step is absorption done by cells of the mucous membrane of the intestine. For this task a large absorption surface is an advantage. How is it possible in the small internal space of the body of a pluricellular organism to present a large intestinal surface?

Description : After digestion the next step is absorption done by cells of the mucous membrane of the intestine. For this task a large absorption surface is an advantage. How is it possible in the small internal space of the body of a pluricellular organism to present a large intestinal surface?

Last Answer : Evolution tried to solve this problem in two ways. The simplest is the long and tubular shape of the bowels (approximately eight meters in extension), making possible that numerous ... function of increasing the absorption surface too. Digestion System - Image Diversity: intestinal villi microvilli

Pick out the correct statement. (A) A lower temperature favours the reaction of lower activation energy (B) The dispersion number for a reactor/vessel is uL/D (C) The rate controlling step in a reaction involving many steps is the fastest step (D) Pore volume and porosity of a catalyst is measured by Brunauer￾Emmett-Teller (BET) technique

Description : Pick out the correct statement. (A) A lower temperature favours the reaction of lower activation energy (B) The dispersion number for a reactor/vessel is uL/D (C) The rate controlling step in ... step (D) Pore volume and porosity of a catalyst is measured by Brunauer￾Emmett-Teller (BET) technique

Last Answer : (A) A lower temperature favours the reaction of lower activation energy

If the rate of a chemical reaction becomes slower at a given temperature, then the (A) Initial concentration of the reactants remains constant (B) Free energy of activation is lower(C) Entropy changes(D) Free energy of activation is higher

Description : If the rate of a chemical reaction becomes slower at a given temperature, then the (A) Initial concentration of the reactants remains constant (B) Free energy of activation is lower (C) Entropy changes (D) Free energy of activation is higher

Last Answer : (D) Free energy of activation is higher

Which one of the following enzymes is found in human saliva?

Description : Which one of the following enzymes is found in human saliva?

Last Answer : Ptyalin

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

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

Last Answer : Answer : D