A. extreme physical and chemical conditions must be avoided
B. Sodium citrate must be present in the solution
C. Ca2+ and Mg2+ which are cofactors for DNase must be made available
D. nucleases must be inhibited
Answer: C
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A. Centrifugation of the sample in isotonic saline buffered with sodium citrate
B. Dehydrogenation of the sample in methanol
C. Freezing at -100C in normal saline
D. Homogenization of the sample in isotonic saline buffered with sodium citrate
Answer: D
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A. low deoxyribonuclease activity
B. high deoxyribonuclease activity
C. high proteinase level
D. high nucleases activity
Answer: A
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A. by centrifugation
B. treating the sample with alcohol
C. treating the sample with amylase
D. treating the sample with an organic acid
Answer: C
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A. the sediment
B. the upper aqueous phase
C. the lower aqueous phase
D. middle gel phase
Answer: B
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A. to stabilize the cells
B. Causes the denaturing of the protein
C. Causes the liquidification of the tissue
D. Increases the volume of the tissue
Answer: B
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