What is the force-generating mechanism of the contractile ring?
a) sliding myosin filaments over one another with the aid of actin
b) the sliding of tubulin subunits
c) the shortening of actin filaments by disassembly
d) the sliding of actin filaments over one another with the aid of myosin
Ans: d) the sliding of actin filaments over one another with the aid of myosin
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Four of the five answers listed below are targets of the immune system. Select the exception
a. virus b. normal cells c. cancer cells d. bacteria e. debris and dead cells
An example of endothermic reaction is _______ and exothermic reaction is ______.
Fill in the blank(s) with the appropriate word(s).
The urinary and reproductive systems in the female are entirely separate.
Answer the following statement true (T) or false (F)
The sequence for the processing of proteins originating outside of the cell involves which of the following?
A. Proteins are broken into fragments, transported to the rough endoplasmic reticulum, fuse with a Golgi vesicle containing class II MHCs, and this complex is transported to the plasma membrane. B. Proteins are broken into fragments within a vesicle, which fuses with a Golgi vesicle containing class I MHCs, and this complex is transported to the plasma membrane. C. Proteins are broken into fragments within a vesicle, which fuses with a Golgi vesicle containing class II MHCs, and this complex is transported to the plasma membrane. D. Proteins are broken into fragments, transported to the rough endoplasmic reticulum, combined with class II MHCs, move to the Golgi apparatus, then to the plasma membrane. E. Proteins are broken into fragments, transported to the rough endoplasmic reticulum, combined with class I MHCs, move to the Golgi apparatus, then to the plasma membrane.