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The National Center for Health Statistics publishes information on the duration of marriages in Vital Statistics of the United States.  Which measure of central tendency is more appropriate for data on the duration of marriages, the mean or the median?  Explain your answer.

Mammalian cells were grown in a cell culture medium that contains large amounts of uracil labeled with radioactivity on the two nitrogens in the uracil ring. Assume that this radioactive nitrogen remains in uracil and cannot be transferred to any other molecule.  Which of the following molecules would probably contain radioactivity? 

Indicate the sequence which represents a correct transcript of the following segment of DNA: 3′ TAGCTTGGCACA 5′ Coding Strand (nontemplate strand) 5′ ATCGAACCGTGT 3′   Watch your 5′ to 3′ end!

This type or marker as a slightly sloping top.

A monument erected to the memory of the dead, with the dead human body not present.

A pea breeder has performed a series of dihybrid genetic crosses looking at pea color and shape. Yellow color and round peas are each dominant traits while green and wrinkled are each recessive. The following progeny in the second generation (F2) were observed: 150 yellow wrinkled, 417 yellow round, 61 green wrinkled, and 159 green round. The breeder’s hypothesis is that this does not follow Mendel’s rules for random, independent assortment of the traits. Instead, she thinks that there is linkage between these traits. Is her hypothesis correct?

Consider the DNA template 3’—AAATTTTAGCCA—5′. When transcribed, which of the following is the correct resulting transcript?

When Mendel crossed yellow-seeded and green-seeded pea plants and then allowed the offspring to self-pollinate, the results were as follows:  6022 yellow 2001 green 8023 total It is apparent that green is ________.

“Structure N” is most likely ________.

You are trying to inhibit mRNA transcription in eukaryotic animal cells.  You have received three different versions of the same oral drug (attaches to and inhibits RNA polymerase) from the pharmaceutical company.  Drug A is only permeable to the cell membrane and not the nucleus.  Drug B is only permeable to the nucleus but not the cell membrane.  Drug C is permeable to both the cell membrane and nucleus.  Which drug would be the most effective in inhibiting mRNA transcription?