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

Biology & Microbiology

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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.

Biology & Microbiology

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.

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Directly on the underside of the fruiting body of a mushroom, you will find __________

a. hyphae b. mycelia c. seeds d. spores

Biology & Microbiology

Which panel of the figure represents the DNA with

genes of interest? a. A b. B c. C d. D e. both A andb

Biology & Microbiology