Microtubules are typically _______ in diameter.
a. 7 nm
b. 10-12 nm
c. 25 nm
d. 35 nm
e. 55 nm
Ans: c. 25 nm
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Messenger RNAs containing premature stop codons are destroyed by the mechanism of
A) nonstop decay. B) directed RNase activity. C) nonsense-mediated decay. D) error-mediated repair. E) none of the above
What is the environmental advantage of using strip logging?
1.Runoff from the cleared area rolls down to the previously logged region below.
2.Small strips of logged areas can provide wildlife corridors.
3.The road is cut along a streambed to avoid disrupting the forest ecosystem.
4.Strip logging involves planting strips of different species to try to increase biodiversity.
Following ovulation, the follicle develops into a corpus luteum
____________________ Indicate whether the statement is true or false.
What is the cause of hemolytic disease of the newborn?
A) The mother has eosinophilia during pregnancy. B) An O blood type mother produces anti-A antibodies which cross the placenta and react with the baby's A antigens. C) Antibodies of an A or B blood type mother cross the placenta and react with baby's O antigens. D) The mother produces anti-Rh antibodies which cross the placenta and react with baby's Rh antigens. E) The mother's mast cells degranulate in the placenta, damaging it.