Why are stains such as methylene blue and iodine solution used when observeing cells under the microscope?

Why are stains such as methylene blue and iodine solution used when observeing cells under the microscope?
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Methylene blue, from its aqueous solution, is adsorbed on activated charcoal at `25^(@) C`. For this process, the correct statement is

Description : Methylene blue, from its aqueous solution, is adsorbed on activated charcoal at `25^(@) C`. For this process, the correct statement is

Last Answer : Methylene blue, from its aqueous solution, is adsorbed on activated charcoal at `25^(@) C` ... of temperature. D. The adsorption is irreversible.

Which among the following stage is suitable indicator when solution of sodium carbonate is mixed with sulphuric acid ? (1) Methylene blue (2) Methyl red (3) Phenolphthaline (4) Methyl orange

Description : Which among the following stage is suitable indicator when solution of sodium carbonate is mixed with sulphuric acid ? (1) Methylene blue (2) Methyl red (3) Phenolphthaline (4) Methyl orange

Last Answer : Methyl orange

Methylene blue test?

Description : Methylene blue test?

Last Answer : DefinitionThe methylene blue test is used to determine the type of the blood disorder, methemoglobinemia.How the test is performedThe health care provider wraps a tourniquet or blood pressure cuff around your ... tube into your vein. The health care provider looks at how the powder turns a subst

Methylene blue staining of metachromatic granules is diagnostic for which of the following bacteria? a. Mycobacterium Tuberculosis b. Coiynebacterium Diphtheriae c. Chlamydia Pneumoniae d. Bordetella Pertussis

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The acidic solution of a salt produced a deep blue colour with starch iodine solution. The salt may be

Description : The acidic solution of a salt produced a deep blue colour with starch iodine solution. The salt may be

Last Answer : The acidic solution of a salt produced a deep blue colour with starch iodine solution. The salt may be A. chloride B. carbonate C. acetate D. bromide

The acidic solution of a salt produced a deep blue colour with starch iodine solution. The salt may be

Description : The acidic solution of a salt produced a deep blue colour with starch iodine solution. The salt may be

Last Answer : The acidic solution of a salt produced a deep blue colour with starch iodine solution. The salt may be A. Suphite B. Bromide C. Nitrite D. Chloride

Why did the mixture stop turning the drops of iodine solution blue after 240s?

Description : Why did the mixture stop turning the drops of iodine solution blue after 240s?

Last Answer : Because it didn't react with the iodine, i don't know

A potato tuber has been cut into two halves. A few drops of iodine solution are placed on the cut surface of one of the halves. What colour change will be noticed? (1) From brown to blue-black (2) From brown to orange-red (3) From blue to pink (4) From pink to blue-green

Description : A potato tuber has been cut into two halves. A few drops of iodine solution are placed on the cut surface of one of the halves. What colour change will be noticed? (1) From brown to blue-black (2) From brown to orange-red (3) From blue to pink (4) From pink to blue-green

Last Answer : (1) From brown to blueblack Explanation: Any form of starch (carbohydrate) turns blue-black when iodine solution is applied to it. This is because starch is composed of polymers of ... already mentioned. The complex of iodine stuck inside the amylose coil produces a characteristic blueblack colour.

potato tuber has been cut into two halves. A few drops of iodine solution are placed on the cut surface of one of the halves. What colour change will be noticed? (1) From brown to blue-black (2) From brown to orange-red (3) From blue to pink (4) From pink to blue-green

Description : potato tuber has been cut into two halves. A few drops of iodine solution are placed on the cut surface of one of the halves. What colour change will be noticed? (1) From brown to blue-black (2) From brown to orange-red (3) From blue to pink (4) From pink to blue-green

Last Answer : (1) From brown to blueblack Explanation: The Iodine test is used to test for the presence of starch. Iodine solution — iodine dissolved in an aqueous solution of potassium iodide — reacts with the starch producing a purple black colour.

A potato tuber has been cut into two halves. A few drops of iodine solution are placed on the cut surface of one of the halves. What colour change will be noticed? (1) From brown to blue–black (2) From brown to orange–red (3) From blue to pink (4) From pink to blue–green

Description : A potato tuber has been cut into two halves. A few drops of iodine solution are placed on the cut surface of one of the halves. What colour change will be noticed? (1) From brown to blue–black (2) From brown to orange–red (3) From blue to pink (4) From pink to blue–green

Last Answer : From brown to blue–black

A potato tuber has been cut into two halves. A few drops of iodine solution are placed on the cut surface of one of the halves. What colour change will be noticed? (1) From brown to blue-black (2) From brown to orange-red (3) From blue to pink (4) From pink to blue-green

Description : A potato tuber has been cut into two halves. A few drops of iodine solution are placed on the cut surface of one of the halves. What colour change will be noticed? (1) From brown to blue-black (2) From brown to orange-red (3) From blue to pink (4) From pink to blue-green

Last Answer : From brown to blue-black

A student wishes to study the cell structure under a light microscope having 10X eyepiece and 45X objective. He should illuminate the object by which one of the following colours of light so as to get the best possible resolution? (a) Blue (b) Green (c) Yellow (d) Red

Description : A student wishes to study the cell structure under a light microscope having 10X eyepiece and 45X objective. He should illuminate the object by which one of the following colours of light so as to get the best possible resolution? (a) Blue (b) Green (c) Yellow (d) Red

Last Answer : (a) Blue

For the synthesis of TMP from dump, a coenzyme is required which is (A) N10- Formyl tetrahydrofolate (B) N5- Methyl tetrahydrofolate (C) N5, N10- Methylene tetrahydrofolate (D) N5- Formimino tetrahydrofolate

Description : For the synthesis of TMP from dump, a coenzyme is required which is (A) N10- Formyl tetrahydrofolate (B) N5- Methyl tetrahydrofolate (C) N5, N10- Methylene tetrahydrofolate (D) N5- Formimino tetrahydrofolate

Last Answer : Answer : C

Neogenesis of methyl group is (A) The availability of methyl group form δ adenosyl methionine (B) The availability of methyl group from betaine (C) Interaction between N5 N10 methylene tetra hydrofolate with a NAD+ dependent reductase (D) Availability of methyl group from methyl B12

Description : Neogenesis of methyl group is (A) The availability of methyl group form δ adenosyl methionine (B) The availability of methyl group from betaine (C) Interaction between N5 N10 methylene tetra hydrofolate with a NAD+ dependent reductase (D) Availability of methyl group from methyl B12

Last Answer : Answer : C

Which of the following is a detergent? (A) Fatty alcohol (B) Alkyl benzene sulphonate (ABS) (C) Fatty acids (D) Methylene chloride

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Last Answer : (B) Alkyl benzene sulphonate (ABS)

Which of the following correctly ranks the cycloalkanes in order of increasing ring strain per methylene? (a) cyclopropane < cyclobutane < cyclohexane < cycloheptane (b) cyclohexane < cyclopentane < cyclobutane < cyclopropane (c) cyclopentane < cyclobutane < cyclopentane < cyclopropane (d) cyclopentane < cyclopropane < cyclobutane < cyclohexane

Description : Which of the following correctly ranks the cycloalkanes in order of increasing ring strain per methylene? (a) cyclopropane < cyclobutane < cyclohexane < cycloheptane (b) cyclohexane < ... < cyclobutane < cyclopentane < cyclopropane (d) cyclopentane < cyclopropane < cyclobutane < cyclohexane

Last Answer : cyclohexane < cyclopentane < cyclobutane < cyclopropane

Active methylene compounds are called as….. a. H-acid b. C-acid c. mineral acid d. Proton sponge

Description : Active methylene compounds are called as….. a. H-acid b. C-acid c. mineral acid d. Proton sponge

Last Answer : b. C-acid

This noncombustible liquid in its dry form is noncorrosive to common metals except aluminum. About 90% of all of this material which is manufactured goes into the production of chlorofluorocarbons. Is this substance: w) carbon tetrachloride x) methylene chloride y) hydrogen chloride z) methyl fluoride

Description : This noncombustible liquid in its dry form is noncorrosive to common metals except aluminum. About 90% of all of this material which is manufactured goes into the production of chlorofluorocarbons. ... substance: w) carbon tetrachloride x) methylene chloride y) hydrogen chloride z) methyl fluoride

Last Answer : ANSWER: W -- CARBON TETRACHLORIDE

Name the green dot like structures in some cells observed by a student when a leaf peel was viewed under a microscope. What is this green colour due to? -Biology

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Cells are commonly studied in the lab. If you were examining various unlabelled slides of cells under the microscope, you could tell if the cell was from a plant by the presence of (A) A nucleus (B) A cell membrane (C) Cytoplasm (D) A cell wall

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Last Answer : (D) A cell wall

The fluorescence examination of the seminal stains indicates (a). Pink color (b). White color (c). Blue color (d). Red color

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Last Answer : Ans: (b). Blue color 

Do blue lights give better resolution than white light on a microscope?

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Last Answer : Feel Free to Answer

Why would it be advantages to use blue light with compound microscope?

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Last Answer : Ans. The limit, to which a microscope can be used to resolve details, depends upon the width of the objective. A wider objective and use of blue light (short wavelength) produces less diffraction and allows more details to be viewed.

Which of the following is used to remove rust stains on cloth? (1) Kerosene (2) Lime (3) Oxalic acid solution (4) Petrol

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Which of the following is used to remove rust stains on cloth? (1) Kerosene (2) Lime (3) Oxalic acid solution (4) Petrol

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Last Answer : Oxalic acid solution

Which type of microscope is used to study extremely small things, such as cell structures by passing a beam of electrons through an object?

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Last Answer : optical microscope

One can buy cheap microscope for use of children. The images seen in such microscope have colored edges, why is this so?

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What if Ian is looking at cells using a microscope. He sees a nucleus and a large vacuole in the central area of a cell. What type of cell is he most likely looking at?

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PAS staining of microscope sections of red blood cells gives ?

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Last Answer : Extracellular. All glycoprotein and glycolipids of the plasma membrane of red and all other cells are on theoutside of the cell. No oligosaccharides are present on the inner face of the cell membrane. 

A major breakthrough in the studies of cells came with the development of electron microscope. This is because (a) the electron microscope is more powerful than the light microscope as it uses a beam of electrons which has wavelength much longer than that of photons (b) the resolving power of the electron microscope is much higher than that of the light microscope (c) the resolving power of the electron microscope is 200 - 350 nm as compared to 0.1 - 0.2 nm for the light microscope (d) electron beam can pass through thick materials, whereas light microscopy requires thin sections.

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Last Answer : (b) the resolving power of the electron microscope is much higher than that of the light microscope

The _____ microscope would be used to view cell structures within ultrathin sections of cells. a. scanning electron b. transmission electron c. bright-field d. dark-field

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Last Answer : b. transmission electron

Before bacterial cells are simple stained and observed with the light microscope, they must be a. Smeared on a slide. b. Heat fixed. c. Air dried. d. All the above (A—C) are correct.

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Last Answer : d. All the above (A—C) are correct.

Who was the first person to see bacterial cells with the microscope? a. Pasteur b. Koch c. Leeuwenhoek d. Hooke

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Last Answer : c. Leeuwenhoek

Study of the micro anatomy of cells, tissues and organs as seen through a microscope is called

Description : Study of the micro anatomy of cells, tissues and organs as seen through a microscope is called

Last Answer : Histology

Classify the following mixtures as homogeneous and heterogeneous. (i)Tincture of iodine (iv)Sugar solution (ii)Smoke (iii)Brass -Chemistry

Description : Classify the following mixtures as homogeneous and heterogeneous. (i)Tincture of iodine (iv)Sugar solution (ii)Smoke (iii)Brass -Chemistry

Last Answer : In the above classification, tincture of iodine, brass and sugar are homogenous mixture while the smoke is heterogeneous mixture. Tincture of iodine is a liquid solution, brass is an alloy made ... component. Smoke on other hand is composed of moisture and gas thus making the mixture heterogeneous.

iodine is liberated from Kl solution when treated with:

Description : iodine is liberated from Kl solution when treated with:

Last Answer : iodine is liberated from Kl solution when treated with: A. (A) `ZnSO_4` B. (B) `CuSO_4 ` C. (C) `NiSO_4 ` D. (D) `FeSO_4`

25 mL of household bleach solution was mixed with 30 mL of o.50 M Kl and 10 mL of 4N acetic acid. In the titration of the liberated iodine, 48 mL of 0

Description : 25 mL of household bleach solution was mixed with 30 mL of o.50 M Kl and 10 mL of 4N acetic acid. In the titration of the liberated iodine, 48 mL of 0

Last Answer : 25 mL of household bleach solution was mixed with 30 mL of o.50 M Kl and 10 mL of 4N acetic acid. In the titration ... B. 0.96 M C. 0.24 M D. 0.024 M

Some amount of "20V" `H_(2)O_(2)` is mixed with excess of acidified solution of Kl. The iodine so liberated required 200 mL of 0.1 N `Na_(2)S_(2)O_(3)

Description : Some amount of "20V" `H_(2)O_(2)` is mixed with excess of acidified solution of Kl. The iodine so liberated required 200 mL of 0.1 N `Na_(2)S_(2)O_(3)

Last Answer : Some amount of "20V" `H_(2)O_(2)` is mixed with excess of acidified solution of Kl. The iodine so liberated ... 56 mL B. 112 mL C. 168 mL D. 224 mL

Some amount of "20V" `H_(2)O_(2)` is mixed with excess of acidified solution of Kl. The iodine so liberated required 200 mL of 0.1 N `Na_(2)S_(2)O_(3)

Description : Some amount of "20V" `H_(2)O_(2)` is mixed with excess of acidified solution of Kl. The iodine so liberated required 200 mL of 0.1 N `Na_(2)S_(2)O_(3)

Last Answer : Some amount of "20V" `H_(2)O_(2)` is mixed with excess of acidified solution of Kl. The iodine so liberated required ... . 0.8 g C. 4.2 g D. 0.98 g

Some amount of "20V" `H_(2)O_(2)` is mixed with excess of acidified solution of Kl. The iodine so liberated required 200 mL of 0.1 N `Na_(2)S_(2)O_(3)

Description : Some amount of "20V" `H_(2)O_(2)` is mixed with excess of acidified solution of Kl. The iodine so liberated required 200 mL of 0.1 N `Na_(2)S_(2)O_(3)

Last Answer : Some amount of "20V" `H_(2)O_(2)` is mixed with excess of acidified solution of Kl. The iodine so liberated required ... 37.2 mL C. 5.6 mL D. 22.4 mL

To a 25 mL `H_(2)O_(2)` solution excess acidified solution of Kl was added. The iodine liberated 20 ml of 0.3 N sodium thiosulphate solution. Use thes

Description : To a 25 mL `H_(2)O_(2)` solution excess acidified solution of Kl was added. The iodine liberated 20 ml of 0.3 N sodium thiosulphate solution. Use thes

Last Answer : To a 25 mL `H_(2)O_(2)` solution excess acidified solution of Kl was added. The iodine liberated 20 ml of ... strength of `H_(2)O_(2)` is 1.344 L

One gram of `Na_(3)AsO_(4)` is boiled with excess of solid `KI` in presence of strong `HCl`. The iodine evolved is absorbed in `KI` solution and titra

Description : One gram of `Na_(3)AsO_(4)` is boiled with excess of solid `KI` in presence of strong `HCl`. The iodine evolved is absorbed in `KI` solution and titra

Last Answer : One gram of `Na_(3)AsO_(4)` is boiled with excess of solid `KI` in presence of strong `HCl`. The iodine evolved ... B. 38.4 mL C. 24.7 mL D. 30.3 mL

A mixture containing `As_(2)O_(3)` and `As_(2)O_(5)` required 20 mL of 0.05 N iodine solution for titration. The resulting solution is then acidified

Description : A mixture containing `As_(2)O_(3)` and `As_(2)O_(5)` required 20 mL of 0.05 N iodine solution for titration. The resulting solution is then acidified

Last Answer : A mixture containing `As_(2)O_(3)` and `As_(2)O_(5)` required 20 mL of 0.05 N iodine solution for ... +2H_(2)O " " `(Atomic weight : As = 75)

Iodine solution produces no color with (A) Cellulose (B) Starch (C) Dextrin (D) Glycogen

Description : Iodine solution produces no color with (A) Cellulose (B) Starch (C) Dextrin (D) Glycogen

Last Answer : A

The reagent used to test the presence of starch in leaves is – (1) Fehling's solution (2) Iodine solution (3) Million's reagent (4) Benedict's solution

Description : The reagent used to test the presence of starch in leaves is – (1) Fehling's solution (2) Iodine solution (3) Million's reagent (4) Benedict's solution

Last Answer : (2) Iodine solution Explanation: The Iodine test is used to test for the presence of starch. Iodine solution — iodine dissolved in an aqueous solution of potassium iodide — reacts with the starch producing a purple black color.

Iodine solution is used to test the presence of – (1) Sugar (2) Proteins (3) Starch (4) Fats

Description : Iodine solution is used to test the presence of – (1) Sugar (2) Proteins (3) Starch (4) Fats

Last Answer : (3) Starch Explanation: Iodine solution is used to test the presence of starch.

Which one of the following is used in the preparation of antiseptic solution? (1) Potassium nitrate (2) Iodine (3) Iodine chloride (4) Potassium chloride

Description : Which one of the following is used in the preparation of antiseptic solution? (1) Potassium nitrate (2) Iodine (3) Iodine chloride (4) Potassium chloride

Last Answer : (2) Iodine Explanation: Antiseptics are chemical agents that slow or stop the growth of micro-organisms (germs) on external surfaces of the body and help prevent infections.

Which of the following alcohols will give a yellow precipitate of iodoform with iodine and dilute NaOH solution? (a) 1-Propanol (b) 2-Propanol (c) 1-Butanol (d) 2-Methyl-2-propanol

Description : Which of the following alcohols will give a yellow precipitate of iodoform with iodine and dilute NaOH solution? (a) 1-Propanol (b) 2-Propanol (c) 1-Butanol (d) 2-Methyl-2-propanol

Last Answer : 2-Propanol

What is to be done with instruments after surgically treating a patient with confirmed diagnosis of hepatitis B,** A. Soak them in hypochlorite solution “Milton” B. Sterilize, scrub and sterilize C. Handle them with two pairs of household rubber gloves D. Scrub them with iodine surgical solution

Description : What is to be done with instruments after surgically treating a patient with confirmed diagnosis of hepatitis B,** A. Soak them in hypochlorite solution Milton B. Sterilize, scrub ... Handle them with two pairs of household rubber gloves D. Scrub them with iodine surgical solution

Last Answer : B. Sterilize, scrub and sterilize

Iodine solution is used to test the presence of (1) Sugar (2) Proteins (3) Starch (4) Fats

Description : Iodine solution is used to test the presence of (1) Sugar (2) Proteins (3) Starch (4) Fats

Last Answer : Starch