Which of the following microbial forms has the highest resistance to physical and chemical controls?
A. Protozoan cysts
B. Bacterial endospores
C. Yeast
D. Naked viruses
E. Fungal spores
Answer: B
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Use the following study to answer the following question(s): A researcher applies varying amounts of fertilizer (0, 2, 4, 8, 10 units) to 50 potted tomato plants. All other variables that may affect the outcome (watering, temperature, sunlight, plant size, etc.) are kept the same from pot to pot. At the end of the growing season, the tomatoes grown on each plant are weighed to determine which fertilizer level produced the largest tomato yield.Which variable is the dependent variable?
A. The plant size at the end of the growing season B. The tomato yield at the end of the growing season C. The temperature D. The fertilizer amount
Media that can be used for the isolation of Mycoplasma include:
a. Thayer-Martin agar with vitamin K. b. 5% sheep blood and IsoVitaleX. c. beef or soybean protein with serum and fresh yeast extract. d. hemin and nicotina-mide-adenine-dinucleotide (NAD) sup-plements.
Which of the following is the enzyme that replaces the RNA nucleotides in a primer with DNA nucleotides?
A) DNA polymerase III B) DNA polymerase I C) primase D) helicase
A typical AA battery has a potential of 1.5V. One can think of the potential in a neuron as having similarities to that of a battery.How does the resting potential of a typical neuron compare to that of a 1.5 V AA alkaline battery?
A. A typical neuron has a resting potential of -70V, or about 50 times the voltage of the battery. B. A typical neuron has a resting potential of -70mV, or about 5% the voltage of the battery. C. A typical neuron has a resting potential of +70V, or about 50 times the voltage of the battery. D. A typical neuron has a resting potential of +70mV, or about 5% the voltage of the battery.