A sodium ion (Na+) has a net charge of positive one; to become ionized, sodium must _____.
A) gain one positively charged proton
B) gain one positively charged neutron
C) lose one negatively charged electron
D) gain one positively charged positron
Ans: C) lose one negatively charged electron
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Sequencing the yeast genome received priority because
A) yeast causes infections in humans. B) yeast is essential in baking and brewing. C) the number of yeast genes is a round number - 6,000. D) one-third of the genome has its counterparts among mammals.
What causes transpiration?
a. hydrogen bonding b. the drying power of air c. cohesion d. turgor pressure e. tension
Phycobilins are
a. photosynthetic pigments. b. found in the red algae. c. blue and red pigments. d. all of the above.
You analyze some DNA using an automated sequence reaction. The first peak you observe is labeled with a red fluorescent label. From this you can conclude that the most ________ base in the DNA is a ________ containing the red fluorescent label.
A. 3'; deoxynucleotide. B. 5'; dideoxynucleotide. C. 5'; deoxynucleotide. D. 3'; dideoxynucleotide.