During pregnancy, the uterine smooth muscle is quiescent. During the 9th month of gestation the uterine muscle becomes progressively more excitable. What factors contribute to the increase in excitability?

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#Question id: 1352

#Unit 4. Cell Communication and Cell Signaling

Actin filaments are to focal adhesions as   _____   are to hemidesmosomes.

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#Question id: 14523

#Unit 13. Methods in Biology

A man takes a step forward with probability 0.4 and backward with probability 0.6. The probability that at the end of eleven steps he is one step away from the starting point.

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#Question id: 18834

#Unit 13. Methods in Biology

A researcher is trying to alter five successive base pairs in the middle of a PCR amplified DNA fragments. Which technique is the most recommended for performing such experiment? 

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#Question id: 600

#Unit 1. Molecules and their Interaction Relevant to Biology

Two substances are used to produce a certain biological product in an enzyme-catalyzed reaction. It is found that both substrates must bind to the enzyme, first one, then the other before the product is produced. This is an example of a/an ________.

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#Question id: 4933

#Unit 11. Evolution and Behavior

What structure do protocells have in common with current cells?