In the Meselson-Stahl DNA replication experiment, if the cells were first grown for many generations in 15N containing media, and then switched to 14N containing media, what percent of the DNA had 1 light strand and 1 heavy strand after 2 generations of growth in 15N growth media?

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#Question id: 14483

#Unit 13. Methods in Biology

In a garden 40% of the flowers are roses and the rest are carnations. If 25% of the roses and 10% of the carnations are red, the probability that a red flower selected at random is a rose.

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#Question id: 2741

#Unit 2. Cellular Organization

Regulatory proteins bind to ___________________.

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#Question id: 32220

#Unit 2. Cellular Organization

The M6P receptor protein binds to M6P at pH 6.5–6.7 in the TGN lumen and releases it at; 

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#Question id: 11458

#Unit 7. System Physiology – Animal

A person able to hear only low-frequency sounds would probably have which of the following structural problems in the ear?

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#Question id: 1775

#Unit 4. Cell Communication and Cell Signaling

How many CDR region in IgM ?