Which event occurs during the luteal phase of the menstrual cycle?
A. The corpus luteum forms.
B. A zona pellucida forms around the oocyte.
C. An oocyte completes meiosis I.
D. Estrogen levels increase.
E. Testosterone levels increase.
Answer: A
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Is reverse transcriptase a RNA-dependent DNA polymerase, or a DNA-dependent DNA polymerase?
A. It is a DNA-dependent DNA polymerase B. It is a RNA-dependent DNA polymerase. C. It is both a a DNA-dependent DNA polymerase and a RNA-dependent DNA polymerase. D. It is neither, reverse transcriptase is actually a DNA-dependent RNA polymerase.
What was one of the pieces of evidence most critical to the discovery of DNA structure?
A. Its composition of four different nucleotides. B. The discovery of its semi-conservative mode of replication. C. An X-ray diffraction pattern suggesting a double helix shape. D. The backbone containing sugar-phosphate linkages. E. The hydrogen bonding between different nucleotides.
Directly on the underside of the fruiting body of a mushroom, you will find __________
a. hyphae b. mycelia c. seeds d. spores
Which panel of the figure represents the DNA with
genes of interest? a. A b. B c. C d. D e. both A andb