Molecular Cell Bio Test IV: Clicker Question
Which of the situations below will enhance microtubule shrinkage?
Addison of a drug that inhibits exchange of GDP for GTP on free tubular dimers
What kind of apoptosis regulator is Bcl-2?
Antiapoptotic
A figure showing how the movement of dyne causes the flagellum to bend. IF instead of the normal situation, the polarity of the adjacent doublet of microtubules were to be reversed, what do you predict would happen?
Bending would occur, except that the right microtubule doublet would move down relative to the left one
Programmed cell death occurs ______________________.
By means of intracellular suicide program
Levels of Cdk activity change during the cell cycle because
Cyclin levels change during the cycle
Which of the statements below about intermediate filaments is false? (a) They can stay intact in cells treated with concentrated salt solutions. (b) They can be found in the cytoplasm and the nucleus. (c) They can be anchored to the plasma membrane at a cell-cell junction. (d) Each filament is about 10 μm in diameter.
D (Each in 10 nm)
How do reproductive along and therapeutic cloning differ
Embryos are placed into foster mothers during reproductive cloning but not during therapeutic cloning
(T/F) Once a cell decides to enter the cel cycle, the time from start to finish is the same in al eukaryotic cells
False
What affect would an overactive Wnt signaling pathway have on the intestine epithelium
Formation of polyps due to over proliferation of gut cells
You add a drug to mitotic cells that inhibit the activity of an enzyme that dephosphorylates nuclear laming. What do you predict will happen to these cells?
The cells should become arrested in mitosis
(T/F) Apoptosis is promoted by the release of cytochrome c into the cytosol from mitochondria
True
(T/F) Motor proteins move in a directional fashion along microtubule by using the inherent structural polarity of a protofilament
True
What would happen if the muscle cell ran out of ATP
Would not bind to actin
An adult hematopoietic stem cell found in the bone marrow _____________________.
Can undergo self-renewing divisions for the lifetime of a healthy animal
You create cells with a version of CDC 6 that cannot be phosphorylated and tis cannot be regarded. Which of the following statements describes the likely consequence of this change in CDC6
Cells will enter S phase prematurely, leading to overpoliferation according to Bayer