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Under some environmental conditions the halophile Halobacterium halobium synthesizes a membrane protein (MW 26,000) bacteriorhodopsin.
Locate the chromosomal map position of the BRCA1 gene and identify the genes located nearby.
We now understand that mutations that cause the inhibition of apoptosis are found in tumors. Because proliferation itself is not induced by the inhibition of apoptosis.
A type of cell called a lymphocyte makes proteins that are exported from the cell. You can track the path of these proteins within the cell from production through export by labeling them with radio
Select at least two cell organelles. What does each organelle do? What changes would happen in the cell if your first organelle took over all the duties of the second organelle.
What structure is found in the eucaryotic cell's nucleus and what is its equivalent in the procaryoltic cell.
Prokaryotic cells are simple cells. Eukaryotic cells are more complex. What structures do eukaryotic cells have that prokaryotic cells do not.
Eukaryotic cells are complex in organization and structure, especially when you consider their small size. Consider the organelle contents of the typical eukaryotic cell.
House the neurtransmitters that will ultimately be released into the synaptic cleft in response to an action potential arriving at the nerve terminal.
A standard procedure in pufying tubulin is to extract the tissue on ice, then add GTP and warm the tissue extract to 37C. The warmed extract is then centrifuged at a speed insufficient to pellet ave
Explain how photosynthesis and respiration are linked in order to provide you with energy from the food you eat.
What sorts of member molecules may be distributed asymmetrically? Why does it make sense for certain components of membranes to be asymmetrically distributed? Give specific examples. How can a membr
Explain what pumps and/or transporters are involved in moving neurotransmitters into synaptic vesicles.
Give a functional definition of a eukaryotic gene. Please include all parts of a eukaryotic gene and what the function of each element is. Which parts of a newly synthesized eukaryotic mRNA molecule
The addition of oligomycin to mitochrondria markedly drecreased both the rate of electron transfer from NADH to oxygen and the rate of ATP formation.
Nigericin is an ionophore that exchanges K+ for H+ across membranes. Explain how the treatment of functioning mitochondria with nigericin uncouples electron transport form oxidative phosphorylation.
Certain chemicals block ATP synthesis by allowing protons and other ions to "leak across membranes," disrupting the charge and protein gradients established by electron flow through an electron tran
Compare the divisions of the autonomic nervous system's effect on heart rate and stroke volume.
Several ions are responsible for the resting membrane potential. Describe the forces that determine resting membrane potential.
You were cleaning out the aquariums in the biology lab and you accidentally placed the saltwater fish in the freshwater tank. What will happen to the cells of these fish.
Synaptic vesicles are released at the synaptic cleft in response to action potentials arriving at the nerve terminal.
All cells are surrounded by a phospholipid bilayer membrane. The function of the phospholipid bilayer is to act as a barrier between the living cell and the environment.
The integrity of the plasma membrane is essential for cellular survival. Could the immune system utilize this fact to destroy foreign cells that have invaded the body? How might cells of the immune
All life forms on Earth exist either as single cells or as collections of cells that have a plasma membrane at their periphery (though some cells have cell walls outside their plasma membrane). Why
Mary noticed a large, brown spot on her skin. She has been playing tennis in the sun for several years without sun protection. She reported the discovery to a friend.