Magnesium has an atomic number of 12. What is the most stable charge for a magnesium ion?
A) a +1 charge
B) a +2 charge
C) a -1 charge
D) a -2 charge
B
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Name the indicated structure in this image of a bird embryo
1.amniotic cavity
2.allantois
3.chorion
4.yolk
Which of the following is NOT an example of symbiosis?
A) bacteria in the human colon B) tapeworm in the human intestine C) tuberculosis in the human lung D) protozoa in termites E) microbes passing across the placenta to the fetus
A particular fibroblast mutation fails to move to the site of infection. It is discovered that this mutation causes a particular protein to be absent, which leads to premature actin mRNA translation. Which protein is most likely absent due to the
mutation? A) ZBP1 (zip code-binding protein) B) CPEB C) general transcription factor D) poly-A polymerase E) Src