Gel electrophoresis separates the DNA
fragments according to
a. their length.
b. their mass.
c. their speed of travel through the gel.
d. the number of nucleotides in the fragment.
e. all of these.
E
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Ethylene oxide is gas that
A. is very useful for sterilizing heat or moisture-sensitive items. B. is potentially carcinogenic. C. is used as a 37% aqueous solution. D. is effective against all microorganisms except endospores and viruses. E. is very useful for sterilizing heat or moisture-sensitive items AND is potentially carcinogenic.
Which of the following is the correct order of genes A, B, and C?
You analyze 300 offspring and see the following: 30 recombinants between gene A and B 120 recombinants between genes B and C 90 recombinants between genes A and C A. Gene order is BAC B. Gene order is ABC C. Gene order is BCA D. Gene order is ABC or BAC E. Gene order can be ABC, BAC, or BCA.
The lungs have increased surface area to increase the movement of oxygen into the circulatory system.
a. true b. false
The concept that living organisms arise from nonliving material is called ________.
A. cell theory B. germ theory C. spontaneous generation D. biogenesis