A common first separation technique in 2D gels is isoelectric focusing. What property is isoelectric focusing taking advantage of?

A) size B) amino acid content
C) the pH at which the overall charge is zero D) charge


Answer: C

Biology & Microbiology

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An ionic interaction, such as the interaction between Na+ and Cl-, is considered a covalent bond

A. true B. false

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The pH of unpolluted rainwater is closest to:

a. 2 b. 4 c. 6 d. 8 e. 10

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Which of these seeds is modified for dispersal by animals?

1.A 2.B 3.C 4.D

Biology & Microbiology

Why is it unlikely that genetically engineered strains of bacteria would pose a threat to the

environment? a. Genetically engineered bacteria cannot survive exposure to UV radiation. b. Genetically engineered strains of bacteria are strictly regulated, making accidental release unlikely. c. Genetically engineered strains of bacteria cannot survive exposure to oxygen. d. Genetically engineered strains of bacteria are poor competitors of wild strains. e. Genetically engineered strains of bacteria require supplemental nutrients to survive.

Biology & Microbiology