EcoRI and HindIII are ________.
A. palindromes
B. reverse transcriptases
C. restriction endonucleases
D. ligases
E. DNA polymerases
Answer: C
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Which of the following are parts of the brain?
A. brain stem B. cerebellum C. diencephalon D. cerebrum E. central canal F. spinal cord
What part of the DNA molecule is most exposed to the watery environment in the cell?
A) the flat, tightly stacked plates of the nucleotide bases B) the ionically-charged phosphate groups in the "backbone" C) the deoxyribose sugar alcohol groups in the "backbone" D) the hydrogen-bonding links between nucleotides
Two closely related populations of mice have been separated for a long period by a river. Climatic change causes the river to dry up, thereby bringing the mice populations back into contact in a zone of overlap. Which of the following is not a possible outcome when they meet?
A) They interbreed freely and produce fertile hybrid offspring. B) They no longer attempt to interbreed. C) They interbreed in the region of overlap, producing an inferior hybrid. Subsequent interbreeding between inferior hybrids produces progressively superior hybrids over several generations. D) They remain separate in the extremes of their ranges but develop a hybrid zone in the area of overlap. E) They interbreed in the region of overlap, but produce sterile offspring.
The microbes used by fermentation industries are mutant strains that synthesize large quantities of the desired product.
Answer the following statement true (T) or false (F)