Figure 28.12
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The following question refers to the accompanying figure illustrating transport in phloem.
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Companion cell-assisted loading of organic compounds is indicated by letter ____.
A. A
B. B
C. C
D. D
E. E
Answer: B
Biology & Microbiology
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Two-dimensional gel electrophoresis
A. can be used to resolve thousands of proteins in a complex mixture. B. separates proteins based on their isoelectric pH. C. separates proteins based on their size. D. All of the choices are correct.
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Complementary DNA (cDNA) probes are produced using
A. RNA polymerase. B. DNA ligase. C. restriction endonucleases. D. reverse transcriptase.
Biology & Microbiology
A solution with a pH of 8 has how many times
fewer hydrogen ions than a solution with a pH of 6?
a. 2 b. 5 c. 10 d. 100 e. 1,000
Biology & Microbiology
Gastrulation in human embryos occurs about
___ after fertilization.
a. 5 days b. 2 weeks c. 4 weeks d. 2 months e. 5 months
Biology & Microbiology