In some ciliate protozoa, the codons UAA and UAG encode glutamate, rather than acting as STOP codons. How does this compare to other species?
A. This is unusual - almost all species share the same "universal" genetic code.
B. This is not unusual - while most species have a similar genetic code, there are often variations for some of the amino acids.
C. This is typical - every species has its own unique genetic code.
Answer: A
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a. radial symmetry. b. asymmetry. c. bilateral symmetry. d. dorsal-ventral symmetry. e. pentamerous symmetry.
In what phase of the cell cycle does an actively dividing cell produce the proteins necessary for mitosis?
a. G1 b. S c. G2 d. prophase e. G1 and G2
What would happen to a plant cell in a hypertonic environment?
A. There would be no change. B. It would swell and burst. C. Its turgor pressure would increase. D. It would shrink.
A few hours after a dinner party, most of the people who attended begin to suffer nausea, vomiting, and diarrhea. The food at the meal is suspected as the source, although no unusual microbes are cultured from samples of the food or from stool samples. These observations suggest they may be suffering from food (infection/intoxication)
What will be an ideal response?