Copernicus, Galileo, and Darwin found that ____ caused their science to be controversial.

A. prevailing belief
B. objective data
C. astronomical theories
D. supernatural influences
E. experimental design


Answer: A

Biology & Microbiology

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Which one of the following is not a result of RNA editing?

A. the deamination of adenosine to produce inosine B. the deamination of cytosine to produce uracil C. the production of differently edited mRNA transcripts from the same gene in different cell types D. the production of different types of proteins from mRNA transcripts for the same gene within a single cell E. the recruitment of RNA polymerase following the binding of general transcription factors

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In the Hershey and Chase experiment, 32P was used to label ____ and 35S was used to label ____

a. RNA; protein b. protein; DNA c. phospholipids; protein d. protein; phospholipids e. DNA; protein

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Which of the following is a difference between how a frog and chytridiomycetes obtain energy?

A. Frogs ingest their food; chytridiomycetes secrete digestive enzymes. B. Chytridiomycetes ingest their food; frogs secrete digestive enzymes. C. Frogs are heterotrophs; chytridiomycetes are phototrophs. D. Chytridiomycetes are heterotrophs; frogs are phototrophs. E. Frogs are autotrophs; chytridiomycetes are phototrophs.

Biology & Microbiology

Which of the following in excess irreversibly inhibits the enzyme nitrogenase?

a. O2 b. NO3? c. N2 d. CO2

Biology & Microbiology