#Question id: 9606
#Unit 9. Diversity of Life Forms
The correct sequence, from the most to the least comprehensive, of the taxonomic levels listed here is
#Question id: 19920
#Unit 13. Methods in Biology
#Question id: 4152
#Unit 3. Fundamental Processes
The pathway for polypeptides exported from E. coli includes the following steps, which occur in what order for correct export?
1. A chaperone, SecA, binds to the polypeptide.
2. A chaperone, SecB, binds to the polypeptide.
3. ATP is hydrolyzed by Sec A.
4. SecA pushes 20 amino acids of the polypeptide into the translocation complex.
#Question id: 8842
#Unit 9. Diversity of Life Forms
In terms of the hierarchical organization of life, a bacterium is at the __________ level of organization, whereas a human is at the __________ level of organization
#Question id: 1104
#Unit 4. Cell Communication and Cell Signaling
Which of the following statements is true of signal molecules?