Why are the strands of DNA said to be complementary to each other?
A) The sugar-phosphate chains are running in opposite directions.
B) All the bases of one strand are paired up with their complementary bases on the other strand.
C) The sugar-phosphate chains of each strand are identical.
D) Both strands can have any of four possible bases attached.
Answer: B
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Meteorites have been found to contain
a. simple sugars. b. fatty acids. c. amino acids. d. nucleotides. e. all of these.
Where would you expect to find the carboxyl end?
A) at the exterior surface B) at the cytosol surface C) connected with the loop at H5 and H6 D) between the membrane layers
Which of the following has not been produced by fermentation technology?
A) Vaccines B) Enzymes C) Biopesticides D) Steroid hormones E) All of the above have been produced by this technology.
How do you think global warming is affecting leaf abscission?
A. Leaf abscission is happening later in the fall. B. Leaf abscission is happening earlier in the fall. C. No change. D. Leaf abscission occurs continually.