DNA precipitation out of a mixture of biomolecules can be achieved by treatment with (a) chilled chloroform (b) isopropanol (c) chilled ethanol (d) methanol at room temperature.

DNA precipitation out of a mixture of biomolecules
can be achieved by treatment with
(a) chilled chloroform
(b) isopropanol
(c) chilled ethanol
(d) methanol at room temperature.
by

1 Answer

Answer :

(c) chilled ethanol
by

Related questions

The alcohol with lowest molecular weight is: w) isopropanol x) propanol y) ethanol z) methanol

Description : The alcohol with lowest molecular weight is: w) isopropanol x) propanol y) ethanol z) methanol 

Last Answer : ANSWER: Z -- METHANOL

During the process of isolation of DNA, chilled ethanol is added to (a) precipitate DNA (b) break open the cell to release DNA (c) facilitate action of restriction enzymes (d) remove proteins such as histones.

Description : During the process of isolation of DNA, chilled ethanol is added to (a) precipitate DNA (b) break open the cell to release DNA (c) facilitate action of restriction enzymes (d) remove proteins such as histones.

Last Answer : a) precipitate DNA

What is the common name of the homogeneous mixture which is a 70% isopropanol solution and sometimes used to reduce body temperature by spreading over the body?

Description : What is the common name of the homogeneous mixture which is a 70% isopropanol solution and sometimes used to reduce body temperature by spreading over the body?

Last Answer : ANSWER: RUBBING ALCOHOL

H2S is scrubbed from refinery gases by absorption using (A) Dilute H2SO4 (B) Ethanol amine (C) Chilled water (D) Tri-butyl phosphate

Description : H2S is scrubbed from refinery gases by absorption using (A) Dilute H2SO4 (B) Ethanol amine (C) Chilled water (D) Tri-butyl phosphate

Last Answer : (B) Ethanol amine

Ethanol and Methanol are miscible in water due to

Description : Ethanol and Methanol are miscible in water due to

Last Answer : Ethanol and Methanol are miscible in water due to A. Dissociation of water B. Their acidic character C. Allyl groups D. Hydrogen bonding

Amino acids are insoluble in (A) Acetic acid (B) Chloroform (C) Ethanol (D) Benzene

Description : Amino acids are insoluble in (A) Acetic acid (B) Chloroform (C) Ethanol (D) Benzene

Last Answer : Answer : D

Which one of the following raw material is used in the manufacture of foam used in mattresses cushions etc. A. Phenol B. Urea C. Methanol D. Ethanol

Description : Which one of the following raw material is used in the manufacture of foam used in mattresses cushions etc. A. Phenol B. Urea C. Methanol D. Ethanol

Last Answer : ANSWER: A

The excessive and chronic use of which of the drug cause uncontrollable trembling, unable to converse, and a victim of terrifying hallucinations? (a) Ethanol (b) Methanol (c) Isopropyl alcohol (d) Codeine

Description : The excessive and chronic use of which of the drug cause uncontrollable trembling, unable to converse, and a victim of terrifying hallucinations? (a) Ethanol (b) Methanol (c) Isopropyl alcohol (d) Codeine

Last Answer : Ans:(a)

This substance is commonly known as alcohol and is also used in medicines such as tincture iodine, cough syrups, and many tonics. This is - (1) Propanol (2) Butane (3) Ethanol (4) Methanol

Description : This substance is commonly known as alcohol and is also used in medicines such as tincture iodine, cough syrups, and many tonics. This is - (1) Propanol (2) Butane (3) Ethanol (4) Methanol

Last Answer : (3) Ethanol Explanation: Ethanol is commonly called alcohol and is the active ingredient of all alcoholic drinks. Also, it is a good solvent and is used in medicines such as tincture iodine, cough syrups, and many tonics.

When yeast ferments glucose, the products obtained are (a) ethanol and CO2 (b) methanol and CO2 (c) ethanol and water (d) water and CO2.

Description : When yeast ferments glucose, the products obtained are (a) ethanol and CO2 (b) methanol and CO2 (c) ethanol and water (d) water and CO2.

Last Answer : a) ethanol and CO2

A typical example of an exothermic reversible reaction conducted at high pressure in industry is (A) Dehydration of ethanol (B) Methanol synthesis (C) Reformation of methane (D) Polymerisation of ethylene

Description : A typical example of an exothermic reversible reaction conducted at high pressure in industry is (A) Dehydration of ethanol (B) Methanol synthesis (C) Reformation of methane (D) Polymerisation of ethylene

Last Answer : (A) Dehydration of ethanol

In the conversion of **** to vinegar (a) Ethanol is oxidized to acetic acid (b) Ethanol is reduced to acetic acid (c) Methanol is oxidized to acetic acid (d) Methanol is reduced to acetic acid

Description : In the conversion of wine to vinegar (a) Ethanol is oxidized to acetic acid (b) Ethanol is reduced to acetic acid (c) Methanol is oxidized to acetic acid (d) Methanol is reduced to acetic acid

Last Answer : Ethanol is oxidized to acetic acid

Which of the following compounds does not give a positive iodoform test : (a) Ethanol (b) Ethanal (c) Methanol (d) Propanone

Description : Which of the following compounds does not give a positive iodoform test : (a) Ethanol (b) Ethanal (c) Methanol (d) Propanone

Last Answer : Methanol

Which of the following compounds will give an iodoform test? (a) Benzoic acid (b) Ethanol (c) Benzyl chloride (d) Methanol

Description : Which of the following compounds will give an iodoform test? (a) Benzoic acid (b) Ethanol (c) Benzyl chloride (d) Methanol

Last Answer : Ethanol

Rectified spirit is (a) 100% Ethanol (b) 90% Ethanol (c) 100% Methanol (d) 95% Ethanol

Description : Rectified spirit is (a) 100% Ethanol (b) 90% Ethanol (c) 100% Methanol (d) 95% Ethanol

Last Answer : 95% Ethanol

Which of the following is an example of biological fluid? A. Ethanol B. Water C. Methanol D. Saliva

Description : Which of the following is an example of biological fluid? A. Ethanol B. Water C. Methanol D. Saliva

Last Answer : D. Saliva

Ethanol is used in methanol poisoning because it: A. Antagonises the actions of methanol B. Stimulates the metabolism of methanol and reduces its blood level C. Inhibits the metabolism of methanol and generation of toxic metabolite D. Replenishes the folate stores depleted by methano

Description : Ethanol is used in methanol poisoning because it: A. Antagonises the actions of methanol B. Stimulates the metabolism of methanol and reduces its blood level C. Inhibits the metabolism of methanol and generation of toxic metabolite D. Replenishes the folate stores depleted by methano

Last Answer : C. Inhibits the metabolism of methanol and generation of toxic metabolite

Coke is made by heating coal in the absence of air at: A. 700 °C B. 1300 °C C. 900 °C D. 1700 °C ANSWER: Why are soft drinks made with chilled water rather than water at room temperature? A. Ingredients dissolve better in chilled water B. Chilled water enhances the taste C. Chilled water attracts more carbon dioxide D. Chilled water is more hygienic

Description : Coke is made by heating coal in the absence of air at: A. 700 °C B. 1300 °C C. 900 °C D. 1700 °C ANSWER: Why are soft drinks made with chilled water rather than water at room ... B. Chilled water enhances the taste C. Chilled water attracts more carbon dioxide D. Chilled water is more hygienic

Last Answer : ANSWER: C

Why are soft drinks made with chilled water rather than water at room temperature? A. Ingredients dissolve better in chilled water B. Chilled water enhances the taste C. Chilled water attracts more carbon dioxide D. Chilled water is more hygienic

Description : Why are soft drinks made with chilled water rather than water at room temperature? A. Ingredients dissolve better in chilled water B. Chilled water enhances the taste C. Chilled water attracts more carbon dioxide D. Chilled water is more hygienic

Last Answer : ANSWER: C

Consider the following biomolecules: 1. Vitamin A 2. Enzyme 3. Testosterone 4. DNA The biomolecules that are made in the human body are: (a) 1, 2 and 4 only (b) 1, 3 and 4 only (c) 2, 3 and 4 only (d) 1, 2 and 3 only

Description : Consider the following biomolecules: 1. Vitamin A 2. Enzyme 3. Testosterone 4. DNA The biomolecules that are made in the human body are: (a) 1, 2 and 4 only (b) 1, 3 and 4 only (c) 2, 3 and 4 only (d) 1, 2 and 3 only

Last Answer : Ans:(c)

The maximum concentration of ethanol that is achieved by successive distillation of fermentation broth in continuous stills is A- .60% B- 95% C- .70% D- 99%

Description : The maximum concentration of ethanol that is achieved by successive distillation of fermentation broth in continuous stills is A- .60% B- 95% C- .70% D- 99%

Last Answer : 95%

Give reason: When a glass test tube containing a mixture of chloroform and acetone is immersed in water will disappear.

Description : Give reason: When a glass test tube containing a mixture of chloroform and acetone is immersed in water will disappear.

Last Answer : The mixture of acetone and chloroform has the same refractive index as that of the glass. The surface of glass will not reflect light. Hence the test tube appears to disappear.

Carbylamine test involves heating a mixture of (a) alcoholic KOH, methyl iodide, and sodium metal (b) alcoholic KOH, methyl iodide, and primary amine (c) alcoholic KOH, chloroform, and primary amine (d) alcoholic KOH, methyl alcohol, and primary amine

Description : Carbylamine test involves heating a mixture of (a) alcoholic KOH, methyl iodide, and sodium metal (b) alcoholic KOH, methyl iodide, and primary amine (c) alcoholic KOH, chloroform, and primary amine (d) alcoholic KOH, methyl alcohol, and primary amine

Last Answer : alcoholic KOH, chloroform, and primary amine

Dehydrogenation of Isopropanol produces (A) Propyl alcohol (B) Acetone (C) Trichloroethylene (D) Formaldehyde

Description : Dehydrogenation of Isopropanol produces (A) Propyl alcohol (B) Acetone (C) Trichloroethylene (D) Formaldehyde

Last Answer : (B) Acetone

Acetone is produced by catalytic dehydrogenation of (A) Phenol (B) Naphthalene (C) Isopropanol (D) Ethyl benzene

Description : Acetone is produced by catalytic dehydrogenation of (A) Phenol (B) Naphthalene (C) Isopropanol (D) Ethyl benzene

Last Answer : (C) Isopropanol

What is the immediate treatment for methanol poisoning?

Description : What is the immediate treatment for methanol poisoning? 

Last Answer : Methanol is oxidised by alcohol dehydrogenase to formaldehyde which causes the acute toxicity. Antidote to methanol poisoning is ethanol which is the natural substrate for alcohol dehydrogenase. So ethanol is preferentially utilised.

Which of the following is a specific inhibitor of the enzyme alcohol dehydrogenase and is useful in the treatment of methanol poisoning: A. Disulfiram B. Ethylene glycol C. Calcium leucovorin D. Fomepizole

Description : Which of the following is a specific inhibitor of the enzyme alcohol dehydrogenase and is useful in the treatment of methanol poisoning: A. Disulfiram B. Ethylene glycol C. Calcium leucovorin D. Fomepizole

Last Answer : D. Fomepizole

The benchmarking parameter for air conditioning equipment is a) kW/Ton of Refrigeration b) kW/ kg of refrigerant handled c) kcal/m3 of chilled water d) Differential temperature across chiller

Description : The benchmarking parameter for air conditioning equipment is a) kW/Ton of Refrigeration b) kW/ kg of refrigerant handled c) kcal/m3 of chilled water d) Differential temperature across chiller

Last Answer : kW/Ton of Refrigeration

The benchmarking parameter for air conditioning equipment is a) kW/Ton of Refrigeration b) kW/ kg of refrigerant handled c) kcal/m3 of chilled water d) Differential temperature across chiLLER

Description : The benchmarking parameter for air conditioning equipment is a) kW/Ton of Refrigeration b) kW/ kg of refrigerant handled c) kcal/m3 of chilled water d) Differential temperature across chiLLER

Last Answer : kW/Ton of Refrigeration

Which of the following is not increased by using preheated combustion air in place of ordinary air at room temperature? (A) Calorific value of the fuel (B) Flame temperature achieved (C) Speed of combustion of fuel (D) Heat transfer rate to the stock in the furnace

Description : Which of the following is not increased by using preheated combustion air in place of ordinary air at room temperature? (A) Calorific value of the fuel (B) Flame temperature achieved (C) Speed of combustion of fuel (D) Heat transfer rate to the stock in the furnace

Last Answer : (A) Calorific value of the fuel

Precipitation in the form of a mixture of rain and snow is called – (1) Drizzle (2) Hail (3) Sleet (4) Snow

Description : Precipitation in the form of a mixture of rain and snow is called – (1) Drizzle (2) Hail (3) Sleet (4) Snow

Last Answer : (3) Sleet Explanation: Sleet is precipitation composed of rain and partially melted snow. It forms when rain, while falling to the earth, passes through a layer of cold air and freezes. Sleet occurs when ... in the lowest part of the atmosphere is slightly above the freezing point of water (0 °C).

Precipitation in the form of a mixture of rain and snow is called (1) Drizzle (2) Hail (3) Sleet (4) Snow

Description : Precipitation in the form of a mixture of rain and snow is called (1) Drizzle (2) Hail (3) Sleet (4) Snow

Last Answer : Sleet

How do you convert your engine to use E85 ethanol mixture?

Description : How do you convert your engine to use E85 ethanol mixture?

Last Answer : answer:You don’t need to, the car is already E85 according to this site Look down to Ford 1999 to 2004 3.0 liter.

Gasohol is a mixture of a) 90% ethanol + 10% gasoline b) 10% ethanol + 90% gasoline c) 40% ethanol + 60% gasoline d) 50% ethanol + 50% gasoline

Description : Gasohol is a mixture of a) 90% ethanol + 10% gasoline b) 10% ethanol + 90% gasoline c) 40% ethanol + 60% gasoline d) 50% ethanol + 50% gasoline

Last Answer : Answer: b Explanation: 10% ethanol + 90% gasoline makes gashol.

The number of degree of freedom for an Azeotropic mixture of ethanol and water in vapour-liquid equilibrium, is (A) 3 (B) 1 (C) 2 (D) 0

Description : The number of degree of freedom for an Azeotropic mixture of ethanol and water in vapour-liquid equilibrium, is (A) 3 (B) 1 (C) 2 (D) 0

Last Answer : B) 1

$ Minerals such as carbonates and phosphates acts as buffers. ! Biomolecules contain only 25 elements out of the 109 known elements.

Description : $ Minerals such as carbonates and phosphates acts as buffers. ! Biomolecules contain only 25 elements out of the 109 known elements.

Last Answer : $ Minerals such as carbonates and phosphates acts as buffers. ! Biomolecules contain only 25 elements out of ... wrong D. If both As and R are wrong.

What are biomolecules? Are they different from the molecules of the lifeless matter? -Biology

Description : What are biomolecules? Are they different from the molecules of the lifeless matter? -Biology

Last Answer : answer:

How do biomolecules differ from biomacromolecules? -Biology

Description : How do biomolecules differ from biomacromolecules? -Biology

Last Answer : answer:

Assertion: The study of biomolecules is called Molecular biology. Reason: Cell is a type of molecule.

Description : Assertion: The study of biomolecules is called Molecular biology. Reason: Cell is a type of molecule.

Last Answer : Assertion: The study of biomolecules is called Molecular biology. Reason: Cell is a type of molecule. A. If ... wrong D. If both As and R are wrong.

How are large organic molecules (biomolecules) synthesized?

Description : How are large organic molecules (biomolecules) synthesized?

Last Answer : Feel Free to Answer

What biomolecules are in eggs?

Description : What biomolecules are in eggs?

Last Answer : because of science

The most abundant biomolecules on earth

Description : The most abundant biomolecules on earth

Last Answer : Ans. Carbohydrates

What is the nature of the interactions between biomolecules?

Description : What is the nature of the interactions between biomolecules?

Last Answer : Interactions between biomolecules depend on the forming and breaking of chemical bonds. The covalent bond is the strongest chemical bond. It links individual atoms within a molecule and ... specificity, and response to water. Although noncovalent interactions are weaker than covalent bonds .

Which of the following biomolecules is common to respiration-mediated breakdown of fats, carbohydrates and proteins? (a) Glucose-6-phosphate (b) Fructose 1, 6-bisphosphate (c) Pyruvic acid (d) Acetyl CoA

Description : Which of the following biomolecules is common to respiration-mediated breakdown of fats, carbohydrates and proteins? (a) Glucose-6-phosphate (b) Fructose 1, 6-bisphosphate (c) Pyruvic acid (d) Acetyl CoA

Last Answer : d) Acetyl CoA

Which of the following biomolecules does have a phosphodiester bond? (a) Amino acids in a polypeptide (b) Nucleic acids in a nucleotide (c) Fatty acids in a diglyceride (d) Monosaccharides in a polysaccharide

Description : Which of the following biomolecules does have a phosphodiester bond? (a) Amino acids in a polypeptide (b) Nucleic acids in a nucleotide (c) Fatty acids in a diglyceride (d) Monosaccharides in a polysaccharide

Last Answer : b) Nucleic acids in a nucleotide

Which one of the following biomolecules is correctly characterized? (a) Lecithin-a phosphorylated glyceride  found in cell membrane. (b) Palmitic acid - an unsaturated fatty acid with 18 carbon atoms. (c) Adenylic acid - adenosine with a glucose phosphate molecule. (d) Alanine amino acid - contains an amino group and an acidic group anywhere in the molecule.

Description : Which one of the following biomolecules is correctly characterized? (a) Lecithin-a phosphorylated glyceride  found in cell membrane. (b) Palmitic acid - an unsaturated fatty acid with 18 carbon atoms. ... Alanine amino acid - contains an amino group and an acidic group anywhere in the molecule.

Last Answer : (a) Lecithin-a phosphorylated glyceride  found in cell membrane

Match the column I with column II. Column-I Column-II A. Golgi apparatus (i) Synthesis of protein B. Lysosomes (ii) Trap waste and excretory products C. Vacuoles (iii) Formation of glycoproteins and glycolipids D. Ribosomes (iv) Digesting biomolecules Choose the right match from options given below. (a) A-(iii), B-(iv), C-(ii), D-(i) (b) A-(iv), B-(iii), C-(i), D-(ii) (c) A-(iii), B-(ii), C-(iv), D-(i) (d) A-(i), B-(ii), C-(iv), D-(iii)

Description : Match the column I with column II. Column-I Column-II A. Golgi apparatus (i) Synthesis of protein B. Lysosomes (ii) Trap waste and excretory products C. Vacuoles (iii) Formation of glycoproteins and glycolipids D. Ribosomes (iv) Digesting ... ), C-(iv), D-(i) (d) A-(i), B-(ii), C-(iv), D-(iii)

Last Answer : (a) A-(iii), B-(iv), C-(ii), D-(i)

Plane-polarized light is affected by (a) Identical molecules (b) All polymers (c) Chiral molecules (d) All biomolecules

Description : Plane-polarized light is affected by (a) Identical molecules (b) All polymers (c) Chiral molecules (d) All biomolecules

Last Answer : Chiral molecules

Metabolism is referred to as (1) synthesis of biomolecules (2) breaking-down of biomolecules (3) synthesis and breaking down of biomolecules (4) recycling of biomolecules

Description : Metabolism is referred to as (1) synthesis of biomolecules (2) breaking-down of biomolecules (3) synthesis and breaking down of biomolecules (4) recycling of biomolecules

Last Answer : synthesis and breaking down of biomolecules

Secondary hardening in steels arises out of the (A) Precipitation of fine alloy carbides at high temperatures (B) Refinement of ferrite grain size by working (C) Decomposition of retained austenite upon heat treatment (D) Precipitation of complex inter-metallic upon heat treatment

Description : Secondary hardening in steels arises out of the (A) Precipitation of fine alloy carbides at high temperatures (B) Refinement of ferrite grain size by working (C) Decomposition of retained austenite upon heat treatment (D) Precipitation of complex inter-metallic upon heat treatment

Last Answer : Option C