What is the role of CaCl2 in the preparation of competent cells? -Biology

What is the role of CaCl2 in the preparation of competent cells? -Biology
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what is role of glycerol is used in preparation of competent cells ? -Biology

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Artificial transformation in laboratory is carried out by treating the cells with a. MgCl2 b. Cacl2 c. NaCl d. HCl

Description : Artificial transformation in laboratory is carried out by treating the cells with a. MgCl2 b. Cacl2 c. NaCl d. HCl

Last Answer : Ans: B

During the process of lysogeny _____. a. Phage DNA Integrates Into The Bacterial Chromosome.b. A Bacterium Acquires DNA From The External Environment. c. Competent Cells Receive Plasmids. d. New Phage Particles Are Assembled In The Host Bacterium.

Description : During the process of lysogeny _____. a. Phage DNA Integrates Into The Bacterial Chromosome. b. A Bacterium Acquires DNA From The External Environment. c. Competent Cells Receive Plasmids. d. New Phage Particles Are Assembled In The Host Bacterium.

Last Answer : a. Phage DNA Integrates Into The Bacterial Chromosome.

(a) State and explain Kohlrausch law. (b) How much electricity in terms of Faradays is required to produce 20 g of calcium from molten CaCl2? -Chemistry

Description : (a) State and explain Kohlrausch law. (b) How much electricity in terms of Faradays is required to produce 20 g of calcium from molten CaCl2? -Chemistry

Last Answer : a) Corrosion is an electrochemical phenomenon. At a particular spot of iron j oxidation it takes place and the spot behaves j as anode and the reaction will be: i At anode : 2Fe(s) → 2Fe2+ + 4e- Electrons ... Ca i.e. 40 g of Ca requires electricity = 2F ∴ 20 g of Ca will require electricity = 1F

Calculate the formula unit mass of NaCl and CaCl2. -Chemistry 9th

Description : Calculate the formula unit mass of NaCl and CaCl2. -Chemistry 9th

Last Answer : hii Here's your answer Molar mass of Na=23g/mol " " " Cl=35.5g/mol Formula unit mass of NaCl=23 + 35.5 = 58.5 gm per mole Molar mass of Ca=40g/mol Molar mass of Cl2= 35.5g/mol*2=70gm per mole F. U. M. = 40+70=110 gm per mole

How many atoms are present in CaCl2?

Description : How many atoms are present in CaCl2?

Last Answer : There are three atoms in CaCl2 (calcium chloride) - one calcium atom and two chlorine atoms. It might be argued that there are ions inside the molecule instead of atoms. In that case there is one calcium ion and two chlorine ions.~credits to the original person who actually wrote this.

What is the complete ionic equation for the reaction between na2 So4 and cacl2?

Description : What is the complete ionic equation for the reaction between na2 So4 and cacl2?

Last Answer : Feel Free to Answer

How many grams of Cl are in 385 g of CaCl2?

Description : How many grams of Cl are in 385 g of CaCl2?

Last Answer : 246 g

Methanol cannot be dried with anhydrous CaCl2 because - (1) CaCl2 dissolves in it (2) it is not good dehydrating agent (3) it forms a solid CaCl2 × 4CH3OH (4) it reacts with CH3OH

Description : Methanol cannot be dried with anhydrous CaCl2 because - (1) CaCl2 dissolves in it (2) it is not good dehydrating agent (3) it forms a solid CaCl2 × 4CH3OH (4) it reacts with CH3OH

Last Answer : (3) it forms a solid CaCl2 × 4CH3OH

Stalactites and Stalagmites form due to the precipitation of : (1) CaCO3 (2) CaCl2 (3) MgCl2 (4) MgCO3

Description : Stalactites and Stalagmites form due to the precipitation of : (1) CaCO3 (2) CaCl2 (3) MgCl2 (4) MgCO3

Last Answer : (1) CaCO3 Explanation: Stalactites and stalagmites are formed by water dripping or flowing from fractures on the ceiling of a cave. The dominant mineral in them is calcite (calcium carbonate) ... minerals that may be deposited include other carbonates, opal, chalcedony, limonite, and some sulfides.

Out of (a) 1 M CaCl2 (b) 1 M AlCl3 which aqueous soln. will show max. vapour pressure at 300 K ?

Description : Out of (a) 1 M CaCl2 (b) 1 M AlCl3 which aqueous soln. will show max. vapour pressure at 300 K ?

Last Answer : (a) 1 M CaCl3 , if we assume 100% dissociation, i for CaCl2 = 3 and AlCl3 = 4 and relative lowering of V. P. is directly proportional to i.

Give reasons : (a) Window glass of old building look milky. b) Window glass of old building is thick at bottom. (c) CaCl2 will introduce Schottky defect if added to AgCl crystal.

Description : Give reasons : (a) Window glass of old building look milky. b) Window glass of old building is thick at bottom. (c) CaCl2  will introduce Schottky defect if added to AgCl crystal.

Last Answer : (a) Due to annealing over a number of years glass acquires some crystalline character. (b) Glass is not a true solid. But a super-cooled liquid of high viscosity. It has the property to ... to maintain electrical neutrality. Thus a hole is created and lattice site for every Ca2+ ion introduced. 

Which of the following solvents is used for the extraction of H3PO4 from CaCl2 solution during manufacture of ortho-phosphoric acid by wet process employing hydrochloric acid leaching? (A) Isopropyl alcohol (B) Butyl alcohol (C) Toluene (D) Hexane

Description : Which of the following solvents is used for the extraction of H3PO4 from CaCl2 solution during manufacture of ortho-phosphoric acid by wet process employing hydrochloric acid leaching? (A) Isopropyl alcohol (B) Butyl alcohol (C) Toluene (D) Hexane

Last Answer : (B) Butyl alcohol

In the production of soda ash by Solvay process, the by-product is (A) CaCl2 (B) NH4Cl (C) NH3 (D) NaOH

Description : In the production of soda ash by Solvay process, the by-product is (A) CaCl2 (B) NH4Cl (C) NH3 (D) NaOH

Last Answer : (A) CaCl2

Which of the following is not responsible for causing permanent hardness of water? (A) Ca(HCO3 )2 (B) CaCl2 (C) MgCl2(D) None of these

Description : Which of the following is not responsible for causing permanent hardness of water? (A) Ca(HCO3 )2 (B) CaCl2 (C) Mgcl2 (D) None of these

Last Answer : (A) Ca(HCO3 )2

Ammonia gas can be dried by (A) PCl5 (B) Quick lime (C) CaCl2 (D) Concentrated H2SO4

Description : Ammonia gas can be dried by (A) PCl5 (B) Quick lime (C) CaCl2 (D) Concentrated H2SO4

Last Answer : (B) Quick lime

The main constituent of bones is (A) CaF2 (B) Ca3(PO4)2 (C) CaCO3 (D) CaCl2

Description : The main constituent of bones is (A) CaF2 (B) Ca3(PO4)2 (C) CaCO3 (D) CaCl2

Last Answer : (B) Ca3(PO4)2

The compound which would have the greatest molar effect on the colligative properties of a dilute solution would be: w) CaCl2 x) NaCl y) C6H12O6 z) Benzene

Description : The compound which would have the greatest molar effect on the colligative properties of a dilute solution would be: w) CaCl2 x) NaCl y) C6H12O6 z) Benzene

Last Answer : ANSWER: W -- CaCl2

Stalactites and Stalagmites form due to the precipitation of : (1) CaCO3 (2) CaCl2 (3) MgCl2 (4) MgCO3

Description : Stalactites and Stalagmites form due to the precipitation of : (1) CaCO3 (2) CaCl2 (3) MgCl2 (4) MgCO3

Last Answer : CaCO3

What is role of transgenic organism in preparation of insulin?

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What is the role of an occupier of a major accident hazard installation in preparation of off-site emergency plan?

Description : What is the role of an occupier of a major accident hazard installation in preparation of off-site emergency plan?

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Which of the following statements about the preparation and storage of blood components is/are true? A. Solutions containing citrate prevent coagulation by binding calcium. B. The shelf life of packed red blood cells preserved with CPDA-1 is approximately 35 days at 1؛ to 6؛ C. C. There are normal numbers of platelets in packed red blood cells stored at 1؛ to 6؛ C for more than 2 days. D. The storage lesion affecting refrigerated packed red blood cells includes development of acidosis, hyperkalemia, and decreased intracellular 2,3DPG (diphosphoglycerate).

Description : Which of the following statements about the preparation and storage of blood components is/are true? A. Solutions containing citrate prevent coagulation by binding calcium. B. The ... cells includes development of acidosis, hyperkalemia, and decreased intracellular 2,3DPG (diphosphoglycerate).

Last Answer : Answer: ABD DISCUSSION: After blood has been collected from a donor, it is anticoagulated with a solution containing citrate, which acts by binding calcium. Blood is then separated into its ... transfusion or produce effects other than those predicted based on the content of the unit of blood

What serologicaL test requires sheep red blood cells and a preparation of antibodies that recognizes the sheep red blood ceLls? a. ELISA b. Radioimmunoassay c. Immunodiffusion d. Complement fixation test

Description : What serologicaL test requires sheep red blood cells and a preparation of antibodies that recognizes the sheep red blood ceLls? a. ELISA b. Radioimmunoassay c. Immunodiffusion d. Complement fixation test

Last Answer : d. Complement fixation test

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What is the best way to find a competent physician?

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If the party harmed by my action was an informed, willing and competent free agent, was my harmful action immoral?

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Description : Which is the competent authority that can alter the Constitution or organization of the High Court? -SST 10th

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Who is competent to prescribe conditions as for acquiring Indian citizenship? -General Knowledge

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Which is the competent body to prescribe conditions for acquisition of citizenship

Description : Which is the competent body to prescribe conditions for acquisition of citizenship

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Description : Which is the competent body to prescribe conditions for acquisition of citizenship?

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Description : Who is competent to prescribe conditions as for acquiring Indian citizenship?

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