How does pH affect enzyme activity? -Biology

How does pH affect enzyme activity? -Biology
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Enzymes activity is controlled by (A) pH of the solution (B) Temperature (C) Concentration of the enzyme (D) Concentration of the substrate (E) All of these

Description : Enzymes activity is controlled by (A) pH of the solution (B) Temperature (C) Concentration of the enzyme (D) Concentration of the substrate (E) All of these

Last Answer : Answer : C

Maximum enzyme activity is observed at (A) Acidic pH (B) Neutral pH (C) Basic pH (D) Optimum pH

Description : Maximum enzyme activity is observed at (A) Acidic pH (B) Neutral pH (C) Basic pH (D) Optimum pH

Last Answer : Answer : D

Factors affecting enzyme activity: (A) Concentration (B) pH (C) Temperature (D) All of these

Description : Factors affecting enzyme activity: (A) Concentration (B) pH (C) Temperature (D) All of these

Last Answer : Answer : D

The pH at which an enzyme has maximum activity is known as (A) Isoelectric pH (B) Optimum pH (C) Low pH (D) High pH

Description : The pH at which an enzyme has maximum activity is known as (A) Isoelectric pH (B) Optimum pH (C) Low pH (D) High pH

Last Answer : Answer : B

Activity of an enzyme can be modulated by change of – (1) pH (2) Light (3) Humidity (4) Rainfall

Description : Activity of an enzyme can be modulated by change of – (1) pH (2) Light (3) Humidity (4) Rainfall

Last Answer : (1) pH Explanation: Changes in pH which can accompany metabolic process such as respiration (aerobic glycolysis for example) can alter the conformation of an enzyme and hence enzyme activity. The ... ) which can lead to an alteration in the delicate balance of forces that affect protein structure

What is the effect of pH on the activity of an enzyme?

Description : What is the effect of pH on the activity of an enzyme?

Last Answer : Each enzyme has an optimum pH, on both sides of which the velocity will be drastically reduced. The graph will show a bell-shaped curve.

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

Description : 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 ... (b) Temperature Enzyme activity (c) Substrate Enzymatic concentration activity (d) Enzymatic activity Temperature

Last Answer : (b) Temperature Enzyme activity

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

Activity of an enzyme can be modulated by change of (1) pH (2) Light (3) Humidity (4) Rainfall

Description : Activity of an enzyme can be modulated by change of (1) pH (2) Light (3) Humidity (4) Rainfall

Last Answer : pH

How can pH affect catalase activity Design an experiment to test your hypothesis. Ask your teacher for comments on your design. If necessary revise the procedure. Carry out your experiment and be sure?

Description : How can pH affect catalase activity Design an experiment to test your hypothesis. Ask your teacher for comments on your design. If necessary revise the procedure. Carry out your experiment and be sure?

Last Answer : Need answer

What is the effect of substrate concentration on enzyme activity? -Biology

Description : What is the effect of substrate concentration on enzyme activity? -Biology

Last Answer : answer:

Concentration of substrate on enzyme activity. -Biology

Description : Concentration of substrate on enzyme activity. -Biology

Last Answer : answer:

Gastric enzyme pepsin acts only in acidic medium with in a limited pH concentration. It varies `:`

Description : Gastric enzyme pepsin acts only in acidic medium with in a limited pH concentration. It varies `:`

Last Answer : Gastric enzyme pepsin acts only in acidic medium with in a limited pH concentration. It varies `:` A. 1.20 to 1.80 ... C. 2.00 to 2.50 D. 1.50 to 2.60

Enzyme pepsin acts upon food at a pH of about `:-`

Description : Enzyme pepsin acts upon food at a pH of about `:-`

Last Answer : Enzyme pepsin acts upon food at a pH of about `:-` A. 3 to split proteins B. 2 to ... protein into peptones D. 2 to change protein in amino acids

Explain the process of digestion if a student puts a plain cracker in their mouth, chews it, and holds the mush in their mouth. Mention the pH, temperature, enzyme, substrate and products. ?

Description : Explain the process of digestion if a student puts a plain cracker in their mouth, chews it, and holds the mush in their mouth. Mention the pH, temperature, enzyme, substrate and products. ?

Last Answer : Part of the human body

The Michaelis constant, Km is (A) Numerically equal to ½ Vmax (B) Dependent on the enzyme concentration (C) Independent of pH (D) Numerically equal to the substrate concentration that gives half maximal velocity

Description : The Michaelis constant, Km is (A) Numerically equal to ½ Vmax (B) Dependent on the enzyme concentration (C) Independent of pH (D) Numerically equal to the substrate concentration that gives half maximal velocity

Last Answer : Answer : D

Velocity maximum for an enzyme at half the substrate concentration gives (A) The molecular weight of the enzyme (B) Km value (C) Isoelectric pH (D) Pk value

Description : Velocity maximum for an enzyme at half the substrate concentration gives (A) The molecular weight of the enzyme (B) Km value (C) Isoelectric pH (D) Pk value

Last Answer : Answer : B

The rate of most enzyme catalysed reactions changes with pH. As the pH increases, this rate (A) reaches a minimum, then increases (B) reaches a maximum, then decreases (C) increases (D) decreases

Description : The rate of most enzyme catalysed reactions changes with pH. As the pH increases, this rate (A) reaches a minimum, then increases (B) reaches a maximum, then decreases (C) increases (D) decreases

Last Answer : Answer : B

In enzyme assays, all the following are kept constant except (A) Substrate concentration (B) Enzyme concentration (C) pH (D) Temperature

Description : In enzyme assays, all the following are kept constant except (A) Substrate concentration (B) Enzyme concentration (C) pH (D) Temperature

Last Answer : Answer : B

Vmax of an enzyme may be affected by (A) pH (B) Temperature (C) Non-competitive inhibitors (D) All of these

Description : Vmax of an enzyme may be affected by (A) pH (B) Temperature (C) Non-competitive inhibitors (D) All of these

Last Answer : Answer : D

If all the enzymes, intermediates and cofactors of the citric acid cycle as well as an excess of the starting substrate acetylCoA are present and functional in an organelle free solution at the appropriate pH, which of the following factors of the citric acid cycle would prove to be rate limiting? (A) Molecular oxygen (B) Half life of enzyme (C) Turnover of intermediates (D) Reduction of cofactors

Description : If all the enzymes, intermediates and cofactors of the citric acid cycle as well as an excess of the starting substrate acetylCoA are present and functional in an organelle free solution at the appropriate ... oxygen (B) Half life of enzyme (C) Turnover of intermediates (D) Reduction of cofactors

Last Answer : Answer : D

The optimal pH for the enzyme chymotrypsin is (A) 2.0 (B) 4.0 (C) 6.0 (D) 8.0

Description : The optimal pH for the enzyme chymotrypsin is (A) 2.0 (B) 4.0 (C) 6.0 (D) 8.0

Last Answer : Answer : D

The optimal pH for the enzyme trypsin is (A) 1.0–2.0 (B) 2.0–4.0 (C) 5.2–6.2 (D) 5.8–6.2

Description : The optimal pH for the enzyme trypsin is (A) 1.0–2.0 (B) 2.0–4.0 (C) 5.2–6.2 (D) 5.8–6.2

Last Answer : Answer : C

The optimal pH for the enzyme rennin is (A) 2.0 (B) 4.0 (C) 8.0 (D) 6.0

Description : The optimal pH for the enzyme rennin is (A) 2.0 (B) 4.0 (C) 8.0 (D) 6.0

Last Answer : Answer : B

The optimal pH for the enzyme pepsin is (A) 1.0–2.0 (B) 4.0–5.0 (C) 5.2–6.0 (D) 5.8–6.2

Description : The optimal pH for the enzyme pepsin is (A) 1.0–2.0 (B) 4.0–5.0 (C) 5.2–6.0 (D) 5.8–6.2

Last Answer : Answer : A

The catalytic efficiency of two different enzymes can be compared by the (a) formation of the product (b) pH of optimum value (c) Km value (d) molecular size of the enzyme.

Description : The catalytic efficiency of two different enzymes can be compared by the (a) formation of the product (b) pH of optimum value (c) Km value (d) molecular size of the enzyme.

Last Answer : (c) Km value

What is common among amylase, rennin and trypsin (a) All are protein (b) These are all proteolytic enzyme (c) These are produced in stomach (d) These act at a pH lower than 7

Description : What is common among amylase, rennin and trypsin (a) All are protein (b) These are all proteolytic enzyme (c) These are produced in stomach (d) These act at a pH lower than 7

Last Answer : (a) All are protein

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

The soil pH level primarily controls: a. Soil temperature b. Activity of soil-borne diseases c. Moisture absorption by roots d. Availability of essential plant nutrients

Description : The soil pH level primarily controls: a. Soil temperature b. Activity of soil-borne diseases c. Moisture absorption by roots d. Availability of essential plant nutrients

Last Answer : Availability of essential plant nutrients

Three of the following statements about enzymes are correct and one is wrong. Which one is wrong? (a) Enzymes require optimum pH for maximal activity. (b) Enzymes are denatured at high temperature but in certain exceptional organisms they are effective even at temperatures 80° - 90°C. (c) Enzymes are highly specific. (d) Most enzymes are proteins but some are lipids.

Description : Three of the following statements about enzymes are correct and one is wrong. Which one is wrong? (a) Enzymes require optimum pH for maximal activity. (b) Enzymes are denatured at high temperature but ... - 90°C. (c) Enzymes are highly specific. (d) Most enzymes are proteins but some are lipids.

Last Answer : (d) Most enzymes are proteins but some are lipids.

Which of the following statements about enzymes is wrong? (a) Enzymes are denatured at high temperatures. (b) Enzymes are mostly proteins but some are lipids also. (c) Enzymes are highly specific. (d) Enzymes require optimum pH and temperature for maximum activity

Description : Which of the following statements about enzymes is wrong? (a) Enzymes are denatured at high temperatures. (b) Enzymes are mostly proteins but some are lipids also. (c) Enzymes are highly specific. (d) Enzymes require optimum pH and temperature for maximum activity

Last Answer : (b) Enzymes are mostly proteins but some are lipids also.

How do soil pH affect plants?

Description : How do soil pH affect plants?

Last Answer : likely make it more acidic because of decomposing organic matterreleased by dead plants

How does soil pH affect soil fertility?

Description : How does soil pH affect soil fertility?

Last Answer : soil fertility increases soil PH

How does compost affect the acidity (pH) of soils?

Description : How does compost affect the acidity (pH) of soils?

Last Answer : Finished yard waste compost is neutral, and helps to improve our naturally acid Northwest soils.

Describe application of pH measurement inindustry. How pH affect the electrical conductivity.

Description : Describe application of pH measurement inindustry. How pH affect the electrical conductivity.

Last Answer : Application of pH measurement in Industry:  pH measurement is essential in : 1) Waste water treatment, municipal sewage treatments. 2) Boiler feed water treatment. 3) Drinking ... ions for an acidic solution, Thus solutions having lower pH values are having higher conductivity values.

Describe application of pH measurement in industry. How pH affect the electrical conductivity

Description : Describe application of pH measurement in industry. How pH affect the electrical conductivity

Last Answer : Application of pH measurement in Industry: pH measurement is essential in : 1) Waste water treatment, municipal sewage treatments. 2) Boiler feed water treatment. 3) Drinking water ... ions for an acidic solution, Thus solutions having lower pH values are having higher conductivity values.

Activity of an enzyme can be modulated by change of

Description : Activity of an enzyme can be modulated by change of

Last Answer : pH

Methotrexate blocks the synthesis of thymidine monophosphate by inhibiting the activity of the enzyme: (A) Dihydrofolate reductase (B) Orotate phosphoribosyl transferase (C) Ribonucleotide reductase (D) Dihydroorotase

Description : Methotrexate blocks the synthesis of thymidine monophosphate by inhibiting the activity of the enzyme: (A) Dihydrofolate reductase (B) Orotate phosphoribosyl transferase (C) Ribonucleotide reductase (D) Dihydroorotase

Last Answer : Answer : A

A deficiency of copper effects the formation of normal collagen by reducing the activity of which of the following enzyme? (A) Prolyl hydroxylase (B) Lysyl oxidase (C) Lysyl hydroxylase (D) Glucosyl transferase

Description : A deficiency of copper effects the formation of normal collagen by reducing the activity of which of the following enzyme? (A) Prolyl hydroxylase (B) Lysyl oxidase (C) Lysyl hydroxylase (D) Glucosyl transferase

Last Answer : Answer : B

The deficiency of copper decreases the activity of the enzyme: (A) Lysine oxidase (B) Lysine hydroxylase (C) Tyrosine oxidase (D) Proline hydroxylase

Description : The deficiency of copper decreases the activity of the enzyme: (A) Lysine oxidase (B) Lysine hydroxylase (C) Tyrosine oxidase (D) Proline hydroxylase

Last Answer : Answer : A

A cofactor required for the activity of the enzyme ALA dehydratase is (A) Cu (B) Mn (C) Mg (D) Fe

Description : A cofactor required for the activity of the enzyme ALA dehydratase is (A) Cu (B) Mn (C) Mg (D) Fe

Last Answer : Answer : A

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

An organic substance bound to an enzyme and essential for the activity of enzyme is called (A) Holoenzyme (B) Apoenzyme (C) Coenzyme (D) Isoenzyme

Description : An organic substance bound to an enzyme and essential for the activity of enzyme is called (A) Holoenzyme (B) Apoenzyme (C) Coenzyme (D) Isoenzyme

Last Answer : Answer : C

The shape of an enzyme and consequently its activity can be reversibly altered from moment to moment by (A) Heat (B) Amino acid substrate (C) Allosteric subunits (D) Sulfur substitutions

Description : The shape of an enzyme and consequently its activity can be reversibly altered from moment to moment by (A) Heat (B) Amino acid substrate (C) Allosteric subunits (D) Sulfur substitutions

Last Answer : Answer : C

An allosteric enzyme influences the enzyme activity by (A) Competiting for the catalytic site with the substrate (B) Changing the specificity of the enzyme for the substrate (C) Changing the conformation of the enzyme by binding to a site other than catalytic site (D) Changing the nature of the products formed

Description : An allosteric enzyme influences the enzyme activity by (A) Competiting for the catalytic site with the substrate (B) Changing the specificity of the enzyme for the substrate (C) Changing the conformation ... binding to a site other than catalytic site (D) Changing the nature of the products formed

Last Answer : Answer : C

Different isoenzymes of an enzyme have the same (A) Amino acid sequence (B) Michaelis constant (C) Catalytic activity (D) All of these

Description : Different isoenzymes of an enzyme have the same (A) Amino acid sequence (B) Michaelis constant (C) Catalytic activity (D) All of these

Last Answer : Answer : C

An inorganic ion required for the activity of an enzyme is known as (A) Activator (B) Cofactor (C) Coenzyme (D) None of these

Description : An inorganic ion required for the activity of an enzyme is known as (A) Activator (B) Cofactor (C) Coenzyme (D) None of these

Last Answer : Answer : B

In biosynthesis of cholesterol triparanol inhibits the activity of the enzyme: (A) ∆24 Reductase (B) Oxidosqualene-lanosterol cyclase (C) Isomerase (D) Squalene epoxidase ENZYMES 155

Description : In biosynthesis of cholesterol triparanol inhibits the activity of the enzyme: (A) ∆24 Reductase (B) Oxidosqualene-lanosterol cyclase (C) Isomerase (D) Squalene epoxidase ENZYMES 155

Last Answer : Answer : A

The enzyme glycerol kinase is low activity in (A) Liver (B) Kidney (C) Intestine (D) Adipose tissue

Description : The enzyme glycerol kinase is low activity in (A) Liver (B) Kidney (C) Intestine (D) Adipose tissue

Last Answer : Answer : D

Insulin has no effect on the activity of the enzyme: (A) Glycogen synthetase (B) Fructokinase (C) Pyruvate kinase (D) Pyruvate dehydrogenase

Description : Insulin has no effect on the activity of the enzyme: (A) Glycogen synthetase (B) Fructokinase (C) Pyruvate kinase (D) Pyruvate dehydrogenase

Last Answer : Answer : B