Gel ________ is a process that separates DNA or protein fragments according to their size, by causing them to migrate within a gel in response to an electric field.

A. blotting
B. electrophoresis
C. migration
D. duplication


Answer: B

Biology & Microbiology

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Several rhizobial species within a cross-inoculation group should be able to grow with particular legume species such as alfalfa. However, the same cross-inoculation group would be unable to associate with another legume species such as peas

Indicate whether the statement is true or false.

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Which of the following is true of the boys who

were treated for SCIDs using gene therapy?

a. all were cured b. all died c. they all improved, but not cured d. some contracted leukemia e. none of them were cured

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Which one of the following blood vessels transports oxygenated blood from the lungs to the heart?

A) pulmonary artery B) aorta C) carotid artery D) pulmonary vein E) iliac vein

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Which two heterotrophic organisms most commonly derive nutrition from endosymbiotic relationships with photosynthetic protists?

1. ciliates 2. slime molds 3. parabasalids 4. reef-building coral animals 5. foraminiferans A) 4 and 5 B) 2 and 4 C) 3 and 4 D) 2 and 3 E) 1 and 2

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