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What does Z represent in the following diagram?

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+1 vote
in Enzyme Technology by (55.0k points)
What does Z represent in the following diagram?

(a) Parafilm

(b) Glass rod

(c) Protein solution

(d) Ethanol-dry ice mixture

This question was addressed to me during an interview.

My question is based upon Enzymes Purification in division Enzymes Purification of Enzyme Technology

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Right option is (c) Protein solution

Explanation: The diagram represents the apparatus for organic solvent fractionation using ethanol.

Z in the diagram represents the protein or enzyme solution which is to be purified. Parafilm is placed on the top of the beaker containing protein solution to avoid splashing of the cooling bath contents into the beaker. Glass rod along with motor is added to the beaker containing protein solution for proper mixing. Ethanol-dry ice mixture is used to maintain the temperature of the solvent.

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