In an experiment, you have created a microbial strain in which you have deleted a single gene; to evaluate the transcriptome and the proteome, you
A. run two-dimensional gels.
B. perform DNA sequencing.
C. run microarray analysis.
D. run microarray analysis and two-dimensional gels.
Answer: D
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Tetanus is:
A. a muscle contraction of sustained force. B. a contraction caused by a single action potential. C. an abnormal muscle contraction. D. a contraction where the muscle does not change length. E. a contraction that slowly increases in force.
Which of the following pHs has the highest
concentration of hydrogen ions?
a. 1 b. 3 c. 5 d. 7 e. 9
We can accurately determine the age of a rock or fossil by measuring its ____
a. proton concentration b. electron concentration c. neutron concentration d. isotope concentration e. ion concentration
How do sugars move from one sieve-tube cell to the next?
A) by osmotic diffusion through the sieve plate B) by flowing along with water through perforations in the sieve plate C) by active transport across cell membranes at the sieve plate D) by diffusion through a companion cell that spans the sieve plate