#Question id: 23632
#Unit 13. Methods in Biology
Which formula may be implemented to determine the probability (P) that a library of a given size contains a particular clone? (N is the number of recombinant clones in the library; n is the frequency of occurrence of a desired clone)
#Question id: 283
#Unit 1. Molecules and their Interaction Relevant to Biology
The 30 nm fibers of a chromosome are attached to a/an ________ scaffold that holds the fibers in large loops.
#Question id: 1513
#Unit 4. Cell Communication and Cell Signaling
The kinase activity of ATM is activated in response to DNA damage due to various stresses (e.g., UV irradiation, heat). Activated ATM then triggers following pathways leading to arrest in G1.
A. Chk2 is phosphorylated and, in turn, phosphorylates Cdc25A, thereby marking it for degradation and blocking its role in CDK2 activation.
B. Phosphorylation of p53 stabilizes it, permitting p53-activated expression of genes encoding proteins that cause arrest in G1, promote apoptosis, or participate in DNA repair.
C. Controlling the pool of p53, ATM phosphorylates MDM2 to inactivate it, causing increased stabilization of p53. Another protein p14ARF inhibits the activity of Mdm2 thus stabilizing p53.
Based on the above information, which one of the following statements is correct?
#Question id: 28943
#Unit 7. System Physiology – Animal
Hypothalamus secreting Corticotropin-releasing hormone (CRH) stimulates the secretion of____
#Question id: 11921
#Unit 10. Ecological Principles