Assume that there are 8 rats in the cage: 6 trained and 2 untrained. a rat is removed from the cage and it is noted whether or not it is trained. it is then placed in a different cage. 4 more rats are removed and treated the same way. how many outcomes are possible for this experiment?
(1) which of the following is not a valid outcome for this experiment?
a. uuttu
b. uttut
c. tuttt
(2) how many outcomes are possible for this experiment?

How many variables are altered in a good experiment? a.1 b.0 c.2 d.3

The dna in a cell’s nucleus encodes proteins that are eventually targeted to every membrane and compartment in the cell, as well as proteins that are targeted for secretion from the cell. for example, consider these two proteins: phosphofructokinase (pfk) is an enzyme that functions in the cytoplasm during glycolysis. insulin, a protein that regulates blood sugar levels, is secreted from specialized pancreatic cells. assume that you can track the cellular locations of these two proteins from the time that translation is complete until the proteins reach their final destinations.for each protein, identify its targeting pathway: the sequence of cellular locations in which the protein is found from when translation is complete until it reaches its final (functional) destination. (note that if an organelle is listed in a pathway, the location implied is inside the organelle, not in the membrane that surrounds the organelle.)

18. which statement about cancer is true?