Which one of the following types of RNAs carries information for making a single type of protein?
A. transfer RNA
B. messenger RNA
C. small nuclear RNA
D. ribosomal RNA
E. small interfering RNA
Answer: B
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The Pax6 gene
A. is a master control gene for eye development. B. codes for a protein that controls the expression of many other genes. C. mutant can cause aniridia in humans. D. is a homolog to the eyeless gene in Drosophila. E. All of the choices are correct.
On Gram stain, which organism appears thin in the center and thicker at the ends?
a. Agrobacterium yellow group b. CDC groups EO-3 and EO-4 c. E. meningoseptica d. E. brevis
What characteristics are consistent with a K-selected species? Where do humans fall on the r through
K continuum?
What will be an ideal response?Choose the defining characteristic of all arteries.
A. They only carry oxygenated blood. B. They only carry blood away from the heart. C. They only carry blood back to the heart. D. They only carry deoxygenated blood.