How does the lysogenic cycle differ from the lytic cycle? What will be an ideal response?
For the most part the two are similar. But in the lysogenic cycle, the virus incorporates its genetic
material into the host cell genome. This allows the virus to be replicated along with the host cell
without damaging the host cell.
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Why is ubiquitin nicknamed the "doom tag"?
a. When ubiquitin binds to a target protein, the ubiquitin enzyme degrades the protein. b. When ubiquitin binds to a target protein, the complex is sent to the proteasome and degraded. c. If a cell is deficient in ubiquitin, the cell will die. d. High levels of ubiquitin in a cell cause the cell to destroy vital proteins, leading to premature cell death. e. Ubiquitin binds to ribosomes and prevents them from translating proteins necessary for cell survival.
Each of the following statements regarding CD95-stimulated programmed cell death is true except
A) CD95 ligand binding with CD95 receptor stimulates recruitment of adaptor proteins. B) adaptor proteins stimulate the PI3K-Akt pathway. C) recruitment to sites of receptor clustering activates initiator caspase (caspase 8) activity. D) initiator caspases proteolytically cleave executioner procaspases (procaspase 3). E) a caspase cascade results in the cleavage of many types of proteins in the target cell.
Amphibians were the dominant animal life during the ________ period.
A. Devonian B. Jurassic C. Silurian D. Carboniferous E. Cambrian
Please match the types of mutations with the statements that most accurately describe them, to test your understanding of their causes.
Spontaneous mutation A) Random change in the DNA arising from errors in replication that occur without a known cause B) Result from exposure to known mutagens, which are primarily physical or chemical agents that damage DNA C) Changing of single base in the DNA code that may result in the placement of a different amino acid D) Addition or deletion of bases that changes the reading of mRNA codons