The ribose phosphate group of purine nucleotide is taken from which compound?

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#Question id: 31338

#Unit 2. Cellular Organization

short- interspersed nuclear elements (SINEs) are derived from 

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#Question id: 11548

#Unit 7. System Physiology – Animal

If a portion of the pancreas is surgically removed from a rat and the rat subsequently loses its appetite, one explanation is that the removed portion contains cells that secrete a chemical signal that somehow stimulates appetite. Given this scenario, what type of chemical signaling is occurring?

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#Question id: 2979

#Unit 2. Cellular Organization

Use the data in the accompanying table to answer the question. Minutes Spent in Cell Cycle Phases-

Cell type	G1	S	G2	M
Beta	18	24	12	16
Delta	100	1	0	0
Gamma	18	48	14	20

The data in the table were obtained from a study of the length of time spent in each phase of the cell cycle by cells of three eukaryotic organisms designated beta, delta, and gamma. What is the best explanation for the data associated with delta cells?

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#Question id: 4589

#Unit 11. Evolution and Behavior

Darwin used the phrase "descent with modification" to explain ________.

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#Question id: 32335

#Unit 2. Cellular Organization

Which of the following actin binding protein nucleates assembly and remains associated with the growing plus end?