During processing in the nucleus, a(n) ____________________ is added to the 3’ end of mRNA molecules. Fill in the blank(s) with the appropriate word(s)
poly-A tail
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Most atmospheric oxygen comes from photosynthesis. From which of the following molecules is the oxygen derived?
A. water B. carbon dioxide C. glucose D. chlorophyll a E. chlorophyll b
Non-flowing water bodies, such as lakes, are referred to as lotic ecosystems
Indicate whether the statement is true or false
Which of the following statements best describes the power stroke of muscle contraction?
A) The myosin head bends, pulling the thick filament toward the center of the sarcomere. B) The myosin head bends, pulling the thin filament toward the center of the sarcomere. C) The actin head bends, pulling the thin filament toward the center of the sarcomere. D) The actin head bends, pulling the thick filament toward the center of the sarcomere.
Which of the following terms refers to the genes of an individual?
A. genotype B. probability C. phenotype D. autosomal E. gamete