dna extraction Flashcards

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1
Q

describe the method of DNA extraction

A

place a piece of fruit in a beaker and crush it
add detergent and salt, mix
filter the mixture and collect the liquid in a test tube
pour chilled ethanol into the test tube
DNA precipitates forming a fibrous white solid
use a glass rod to collect the DNA sample

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2
Q

why is salt added to the crushed fruit?

A

salt encourages the precipitation of DNA

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3
Q

glass rod

A

collect/remove the DNA

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4
Q

crushing the fruit

A

helps access cell content

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5
Q

water bath

A

denatures the enzyme

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6
Q

salt water

A

clumps DNA together

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7
Q

washing up liquid

A

breaks down the cell membranes

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