#Question id: 1774
#Unit 4. Cell Communication and Cell Signaling
hinge region provide flexibility to antibody. Which amino acid is responsible for these flexibility?
#Question id: 12091
#Unit 10. Ecological Principles
#Question id: 2947
#Unit 2. Cellular Organization
You perform an experiment where you prevent Cdc20 from binding to APC in a cell line that usually completes the cell cycle in 60 minutes. Your experiment prevents Cdc20 from binding to APC for 120 minutes, and then you fix and stain the DNA, securin, separase and cohesin proteins. Which of the following would NOT be found in the observed cell?
#Question id: 9202
#Unit 9. Diversity of Life Forms
Which of the following statements regarding extinction is accurate?
#Question id: 2073
#Unit 2. Cellular Organization
The phosphate transport system in bacteria imports phosphate into the cell even when the concentration of phosphate outside the cell is much lower than the cytoplasmic phosphate concentration. Phosphate import depends on a pH gradient across the membrane—more acidic outside the cell than inside the cell. In this bacterial cell, phosphate transport is an example of: