In packaging the eukaryotic DNA into nucleosomes, it is thought that the requirement for ________ and their synthesis is a cause of the slower rate of movement of the replication fork.

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#Question id: 14738

#Unit 4. Cell Communication and Cell Signaling

Choose correct statements about Muscarinic receptors;

a. An acetylcholine analog, In activated condition, these receptors slow the rate of heart muscle contraction.

b .This type of receptor is coupled to a Gαi protein, and ligand binding leads to the opening of an associated K+ channel.

c .The subsequent influx of K+ ions from the cytosol causes an increase in the magnitude of the usual inside-negative potential across the plasma membrane that lasts for several seconds. 

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#Question id: 1471

#Unit 4. Cell Communication and Cell Signaling

Proto-oncogenes can change into oncogenes that cause cancer. Which of the following best explains the presence of these potential time bombs in eukaryotic cells?

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#Question id: 12148

#Unit 10. Ecological Principles

If asked to find the cause of regular fluctuations in a population's size not associated with seasonal environmental variation, you would probably first seek evidence for: 

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#Question id: 23074

#Unit 12. Applied Biology

For culturing, plasma from the adult chicken is preferred to mammalian plasma because

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#Question id: 12803

#Unit 10. Ecological Principles

The growing season would generally be shortest in which of the following biomes?