Isoelectric pH is that pH at which protein is electrically: (A) Neutral (B) Anionic (C) Cationic (D) None of these

Isoelectric pH is that pH at which protein is electrically: (A) Neutral (B) Anionic (C) Cationic (D) None of these
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This technique takes the advantage of the fact that each protein has different pH at which it is electrically neutral i.e., its isoelectric pH: (A) Isoelectric focussing (B) Immunoel Ectro Phoresis (C) Chromatography (D) HPLC

Description : This technique takes the advantage of the fact that each protein has different pH at which it is electrically neutral i.e., its isoelectric pH: (A) Isoelectric focussing (B) Immunoel Ectro Phoresis (C) Chromatography (D) HPLC

Last Answer : Answer : A

When `XeF_(4)` donates its fluoride to `SbF_(5)`, then the states of hybridization of central atoms of cationic part and anionic part of the product f

Description : When `XeF_(4)` donates its fluoride to `SbF_(5)`, then the states of hybridization of central atoms of cationic part and anionic part of the product f

Last Answer : When `XeF_(4)` donates its fluoride to `SbF_(5)`, then the states of hybridization of central atoms of cationic part ... ` D. `sp^(3)d,sp^(3)d^(2)`

The most popular and common detergent i.e., alkyl benzene sulfonate (ABS) is a/an __________ detergent. (A) Cationic (B) Anionic (C) Amphoteric (D) Semi polar

Description : The most popular and common detergent i.e., alkyl benzene sulfonate (ABS) is a/an __________ detergent. (A) Cationic (B) Anionic (C) Amphoteric (D) Semi polar

Last Answer : (B) Anionic

Surfactants are a). cationic b). Non-ionic c). Anionic d). All

Description : Surfactants are a). cationic b). Non-ionic c). Anionic d). All

Last Answer : d). All

The isoelectric point of a protein is (a) the pH at which the protein molecule has no charges on its surface. (b) the pH at which a protein in solution has an equal number of positive and negative charges. (c) the electric charge under isothermal conditions. (b) None of these

Description : The isoelectric point of a protein is (a) the pH at which the protein molecule has no charges on its surface. (b) the pH at which a protein in solution has an equal number of positive and negative charges. (c) the electric charge under isothermal conditions. (b) None of these

Last Answer : the pH at which a protein in solution has an equal number of positive and negative charges

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 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

Isoelectric pH of an amino acid is that pH at which it has a (A) Positive charge (B) Negative charge (C) Nil net charge (D) None of these

Description : Isoelectric pH of an amino acid is that pH at which it has a (A) Positive charge (B) Negative charge (C) Nil net charge (D) None of these

Last Answer : Answer : C

Isoelectric pH of an amino acid is that pH at which it has a (A) Positive charge (B) Negative charge (C) No charge (D) None of these

Description : Isoelectric pH of an amino acid is that pH at which it has a (A) Positive charge (B) Negative charge (C) No charge (D) None of these

Last Answer : Answer : C

In the genetic disorder of cystinuria, the patient excretes large quantities of cystine in their urine and its low solubility causes crystalline cystine to precipitate as stones in kidneys. The remedy involves ingesting Na HCO3. Reaction of this treatment is (A) NaHCO2 combines with cystine (B) NaHCO3 raises the pH above the isoelectric point of cystine (C) NaHCO3 prevents stone formation by hydrolysis of cystine to cysteine (D) None of these

Description : In the genetic disorder of cystinuria, the patient excretes large quantities of cystine in their urine and its low solubility causes crystalline cystine to precipitate as stones in kidneys. The remedy ... C) NaHCO3 prevents stone formation by hydrolysis of cystine to cysteine (D) None of these

Last Answer : Answer : C

Isoelectric pH of an amino acid is that pH at which it has a (A) Positive charge (B) Negative charge (C) No net charge (D) All of these

Description : Isoelectric pH of an amino acid is that pH at which it has a (A) Positive charge (B) Negative charge (C) No net charge (D) All of these

Last Answer : Answer : C

At a pH below the isoelectric point, an amino acid exists as (A) Cation (B) Anion (C) Zwitterion (D) Undissociated molecule

Description : At a pH below the isoelectric point, an amino acid exists as (A) Cation (B) Anion (C) Zwitterion (D) Undissociated molecule

Last Answer : Answer : A

At isoelectric pH, an amino acid exists as (A) Anion (B) Cation (C) Zwitterion (D) None of these

Description : At isoelectric pH, an amino acid exists as (A) Anion (B) Cation (C) Zwitterion (D) None of these

Last Answer : Answer : C

Since the pK values for aspartic acid are 2.0, 3.9 and 10.0, it follows that the isoelectric (pH) is (A) 3.0 (B) 3.9 (C) 5.9 (D) 6.0

Description : Since the pK values for aspartic acid are 2.0, 3.9 and 10.0, it follows that the isoelectric (pH) is (A) 3.0 (B) 3.9 (C) 5.9 (D) 6.0

Last Answer : Answer : A

pH (isoelectric pH) of alanine is (A) 6.02 (B) 6.6 (C) 6.8 (D) 7.2

Description : pH (isoelectric pH) of alanine is (A) 6.02 (B) 6.6 (C) 6.8 (D) 7.2

Last Answer : Answer : A

Since the pK values for aspartic acid are 2.0, 3.9 and 10.0, it follows that the isoelectric (pH) is (A) 3.0 (B) 3.9 (C) 5.9 (D) 6.0

Description : Since the pK values for aspartic acid are 2.0, 3.9 and 10.0, it follows that the isoelectric (pH) is (A) 3.0 (B) 3.9 (C) 5.9 (D) 6.0

Last Answer : (A) 3.0

pH (isoelectric pH) of alanine is (A) 6.02 (B) 6.6 (C) 6.8 (D) 7.2

Description : pH (isoelectric pH) of alanine is (A) 6.02 (B) 6.6 (C) 6.8 (D) 7.2

Last Answer : (A) 6.02

Omeprazole exerts practically no other action except inhibition of gastric acid secretion because: A. It transforms into the active cationic forms only in the acidic pH of the gastric juice B. Its active forms have selective affinity for the H+K+ATPase located in the apical canaliculi of gastric parietal cells C. Its cationic forms are unable to diffuse out from the gastric parietal cell canaliculi D. All of the above

Description : Omeprazole exerts practically no other action except inhibition of gastric acid secretion because: A. It transforms into the active cationic forms only in the acidic pH of the gastric juice B. Its ... forms are unable to diffuse out from the gastric parietal cell canaliculi D. All of the above

Last Answer : D. All of the above

The pH at which the amino acid shows no tendency to migrate when placed in an electric field is known as its : (a) Isoelectric point (b) Dipole moment (c) Iodine number (d) Wavelength

Description : The pH at which the amino acid shows no tendency to migrate when placed in an electric field is known as its : (a) Isoelectric point (b) Dipole moment (c) Iodine number (d) Wavelength

Last Answer : Isoelectric point

Give some examples of anionic precipitating agents.

Description : Give some examples of anionic precipitating agents.

Last Answer : Tungstic acid, phosphotungstic acid, trichloro acetic acid, picric acid, sulphosalicylic acid and tannic acid are protein precipitating agents.

When nucleus of an electrically neutral atom undergoes a radioactive decay process, it will remain neutral after the decay if the process is (a) An `a

Description : When nucleus of an electrically neutral atom undergoes a radioactive decay process, it will remain neutral after the decay if the process is (a) An `a

Last Answer : When nucleus of an electrically neutral atom undergoes a radioactive decay process, it will remain neutral ... a`gamma`-decay D. a K-capture process

A good conductor while carrying current is - (1) alternately charged positive and negative (2) negatively charged (3) positively charged (4) electrically neutral

Description : A good conductor while carrying current is - (1) alternately charged positive and negative (2) negatively charged (3) positively charged (4) electrically neutral

Last Answer : (2) negatively charged Explanation: Electrons carry current in a good conductor of electricity and they are negatively charged. This makes a good electrical conductor negatively charged.

When one material is rubbed against the other, then it becomes electrically A. neutral B. charged C. positively charged D. negatively charged

Description : When one material is rubbed against the other, then it becomes electrically A. neutral B. charged C. positively charged D. negatively charged

Last Answer : charged

Why an electrolyte in molten or fused state is electrically neutral?

Description : Why an electrolyte in molten or fused state is electrically neutral?

Last Answer : Ans: Because the number of + ve charges and –ve charges are equal , so as a result an electrolyte appears to be neutral in nature.

When a semiconductor is doped with a P-type impurity, each impurity atom will (A) acquire negative charge. (B) acquire positive charge. (C) remain electrically neutral. (D) give away one electron.

Description : When a semiconductor is doped with a P-type impurity, each impurity atom will (A) acquire negative charge. (B) acquire positive charge. (C) remain electrically neutral. (D) give away one electron.

Last Answer : (A) acquire negative charge.

A good conductor while carrying current is (1) alternately charged positive and negative (2) negatively charged (3) positively charged (4) electrically neutral

Description : A good conductor while carrying current is (1) alternately charged positive and negative (2) negatively charged (3) positively charged (4) electrically neutral 

Last Answer : negatively charged

A long, hollow conducting cylinder is kept coaxially inside another long, hollow conducting cylinder of larger radius. Both the cylinders are initially electrically neutral.

Description : A long, hollow conducting cylinder is kept coaxially inside another long, hollow conducting cylinder of larger radius. Both the cylinders are initially electrically neutral. (A) A potential ... difference appears between the two cylinders when same charge density is given to both the cylinders

Last Answer : (A) A potential difference appears between the two cylinders when a charge density is given to the inner cylinder

Why atom is electrically neutral?

Description : Why atom is electrically neutral? 

Last Answer : Atom of an element is electrically neutral because it contains equal number of proton & electrons. In other words in an atom of an element number of positive charges (protons) are equal to number of ... (electrons) . Hence they cancel each other & as a result atom becomes charge-less or neutral. 

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

Isoelectric point of amino acids is used for (A) Crystallisation (B) Precipitation (C) Solubility (D) Reactivity

Description : Isoelectric point of amino acids is used for (A) Crystallisation (B) Precipitation (C) Solubility (D) Reactivity

Last Answer : Answer : B

The solubility of most proteins is lowered at high salt concentrations is called as (A) Salting in process (B) Salting out process (C) Isoelectric focussing(D) None of these

Description : The solubility of most proteins is lowered at high salt concentrations is called as (A) Salting in process (B) Salting out process (C) Isoelectric focussing(D) None of these

Last Answer : Answer : B

Which of the following techniques is used to separate proteins based upon differences in their mass? (A) Isoelectric focusing (B) Dialysis (C) SDS-gel Electrophoresis (D) Western blotting

Description : Which of the following techniques is used to separate proteins based upon differences in their mass? (A) Isoelectric focusing (B) Dialysis (C) SDS-gel Electrophoresis (D) Western blotting

Last Answer : Answer : C

In regard to Chlorhexidine mouth wash:** A. Is anionic ( opposite) B. Used in 0.02% concentration ( topical skin) C. Used in 0.12% concentration D. Penetrates the gingival crevice/pocket ( no)

Description : In regard to Chlorhexidine mouth wash:** A. Is anionic ( opposite) B. Used in 0.02% concentration ( topical skin) C. Used in 0.12% concentration D. Penetrates the gingival crevice/pocket ( no)

Last Answer : C. Used in 0.12% concentration

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

At neutral pH Alanine has the following structure: (A) − − 2 3 H H N C COOH CH (B) + 3 − − 3 H H N C COO CH (C) 2 − − 3 H H N C COO CH (D) + 2 − − 3 H H N C COO CH

Description : At neutral pH Alanine has the following structure: (A) − − 2 3 H H N C COOH CH (B) + 3 − − 3 H H N C COO CH (C) 2 − − 3 H H N C COO CH (D) + 2 − − 3 H H N C COO CH

Last Answer : Answer : B

A hexa peptide with 5 aspartic acid would have a net charge at pH 7: (A) Neutral (B) Positive (C) Negative (D) Not predictable

Description : A hexa peptide with 5 aspartic acid would have a net charge at pH 7: (A) Neutral (B) Positive (C) Negative (D) Not predictable

Last Answer : Answer : C

When amino acids are treated with neutral formaldehyde, the pH of the mixture (A) Is not altered (B) Increases (C) Decreases (D) First increases then decreases

Description : When amino acids are treated with neutral formaldehyde, the pH of the mixture (A) Is not altered (B) Increases (C) Decreases (D) First increases then decreases

Last Answer : Answer : C

At neutral pH, a mixture of amino acids in solution would be predominantly: (A) Dipolar ions (B) Nonpolar molecules (C) Positive and monovalent (D) Hydrophobic

Description : At neutral pH, a mixture of amino acids in solution would be predominantly: (A) Dipolar ions (B) Nonpolar molecules (C) Positive and monovalent (D) Hydrophobic

Last Answer : Answer : A

At neutral pH, a mixture of amino acids in solution would be predominantly: (A) Dipolar ions (B) Nonpolar molecules (C) Positive and monovalent (D) Hydrophobic

Description : At neutral pH, a mixture of amino acids in solution would be predominantly: (A) Dipolar ions (B) Nonpolar molecules (C) Positive and monovalent (D) Hydrophobic

Last Answer : (A) Dipolar ions

which of the following forms cationic micelles above certain concentration?

Description : which of the following forms cationic micelles above certain concentration?

Last Answer : which of the following forms cationic micelles above certain concentration? A. Cetyltrimethylammonium bromide ... sulphonate C. Sodium acetate D. Urea

Which of the following statements regarding neutrophils are true? a. The neutrophil undergoes final maturation after release into the circulation b. Patients with chronic granulomatous disease have a defective neutrophil H-oxidase system c. Neutrophil killing of bacteria is achieved by oxidants, proteinases and cationic proteins d. The normal human neutrophil circulates in the blood for 7–10 days

Description : Which of the following statements regarding neutrophils are true? a. The neutrophil undergoes final maturation after release into the circulation b. Patients with chronic granulomatous disease have a defective ... proteins d. The normal human neutrophil circulates in the blood for 7-10 days

Last Answer : Answer: b, c The neutrophil is a migratory phagocytic cell that defends the host against bacteria and eliminates necrotic tissue. The neutrophil matures in the bone marrow and is ... phagocytose bacteria, they are unable to kill the intracellular microbes and chronic, unresolved infections result

A cationic complex has two isomers A & B. Each has one Co3+, five NH3 , one Br and one SO4 2 . A gives a white precipitate with BaCl2 solution while B gives a yellow precipitate with AgNO3 solution. (a) What are the possible structures of the complexes A and B ? (a) Will the two complexes have same colour ?

Description : A cationic complex has two isomers A & B. Each has one Co3+, five NH3 , one Br and one SO4 2 . A gives a white precipitate with BaCl2 solution while B gives a yellow precipitate with AgNO3 ... are the possible structures of the complexes A and B ? (a) Will the two complexes have same colour ?

Last Answer : (a) [CO (NH3 ) 5 Br] SO4 and [CO (NH3 ) 5 SO4 ] Br  (b) NO

The main use of HCl is in the (A) Drilling of petroleum wells and pickling of steel sheets (B) Manufacture of cationic detergent (C) Treatment of spent fuel of nuclear reactor (D) None of these

Description : The main use of HCl is in the (A) Drilling of petroleum wells and pickling of steel sheets (B) Manufacture of cationic detergent (C) Treatment of spent fuel of nuclear reactor (D) None of these

Last Answer : (A) Drilling of petroleum wells and pickling of steel sheets

The following is not true of local anaesthetics: A. The local anaesthetic is required in the unionized form for penetrating the neuronal membrane B. The local anaesthetic approaches its receptor only from the intraneuronal face of the Na+ channel C. The local anaesthetic binds to its receptor mainly when the Na+ channel is in the resting state D. The local anaesthetic combines with its receptor in the ionized cationic form

Description : The following is not true of local anaesthetics: A. The local anaesthetic is required in the unionized form for penetrating the neuronal membrane B. The local anaesthetic approaches its receptor ... the resting state D. The local anaesthetic combines with its receptor in the ionized cationic form

Last Answer : C. The local anaesthetic binds to its receptor mainly when the Na+ channel is in the resting state

Calcium absorption is interfered by (A) Protein in diet (B) Phytic acid in cereals (C) Alkaline intestinal pH (D) Vitamin D

Description : Calcium absorption is interfered by (A) Protein in diet (B) Phytic acid in cereals (C) Alkaline intestinal pH (D) Vitamin D

Last Answer : Answer : B

The greatest buffering capacity at physiologic pH would be provided by a protein rich in which of the following amino acids ? (A) Lysine (B) Histidine (C) Aspartic acid (D) Valine

Description : The greatest buffering capacity at physiologic pH would be provided by a protein rich in which of the following amino acids ? (A) Lysine (B) Histidine (C) Aspartic acid (D) Valine

Last Answer : Answer : B

What is zwitterions and its isoelectric point? -Biology

Description : What is zwitterions and its isoelectric point? -Biology

Last Answer : answer:

What type of solution has a pH of 7 Acid basic or neutral?

Description : What type of solution has a pH of 7 Acid basic or neutral?

Last Answer : What is the answer ?

The pH of a neutral solution is - (1) 0-7 (2) 7 (3) 7-14 (4) None of the above

Description : The pH of a neutral solution is - (1) 0-7 (2) 7 (3) 7-14 (4) None of the above

Last Answer : (2) 7 Explanation: The pH of a neutral solution is 7. Values less than 7 on the pH scale represent an acidic solution. As the pH value increases from 7 to 14, the solution turns more basic.

If the pH value of sewage is 7 A. It is acidic B. It is alkaline C. It is neutral D. None of these

Description : If the pH value of sewage is 7 A. It is acidic B. It is alkaline C. It is neutral D. None of these

Last Answer : ANS: C