#Question id: 20539
#Unit 12. Applied Biology
#Question id: 28595
#Unit 2. Cellular Organization
Cyclin A/B-CDK 1 are which phase of Cyclin–CDKs?
#Question id: 26850
#Unit 10. Ecological Principles
#Question id: 3029
#Unit 2. Cellular Organization
Which of the following obtain energy by oxidizing inorganic substances; energy that is used, in part, to fix CO2?
#Question id: 1393
#Unit 4. Cell Communication and Cell Signaling
In research on aging (both cellular aging and organismal aging), it has been found that aged cells do not progress through the cell cycle as they had previously. Which of the following, if found in cells or organisms as they age, would provide evidence that this is related to cell signalling?