In biology class one day, mrs. chabon wrote six physiological functions on the board. then, she asked groups of students to each choose the three functions that are purposes of the excretory system. these are the lists they made. group 1: maintaining ph level of blood; transporting hormones throughout the body; regulating growth group 2: removing wastes from the body; digesting solid foods; maintaining salt and water balance group 3: maintaining salt and water balance; maintaining ph level of blood; regulating growth group 4: removing wastes from the body; maintaining ph level of blood; maintaining salt and water balance which group correctly listed the functions of the excretory system? group 1 group 2 group 3 group 4

Where is the energy in a sucrose molecule stored? o a. inside the hydrogen atoms o b. inside the carbon atoms o c. in the bonds between the atoms o d. inside the protons

Iron reacts with oxygen to produce iron oxide (rust). this reaction is represented in an equation as 4fe + xo2 → 2fe2o3. identify the value of x that will balance the equation.

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.)