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

Biology & Microbiology

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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

Biology & Microbiology

Non-flowing water bodies, such as lakes, are referred to as lotic ecosystems

Indicate whether the statement is true or false

Biology & Microbiology

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.

Biology & Microbiology

Which of the following terms refers to the genes of an individual?

A. genotype B. probability C. phenotype D. autosomal E. gamete

Biology & Microbiology