Which is a true statement about the ATP cycle?
A. The ATP cycle does not involve ADP.
B. The ATP cycle can operate independently of enzyme help.
C. About 100 ATP molecules are regenerated per second per cell.
D. A single muscle cell needs only about one minute to recycle all of its ATP.
D. A single muscle cell needs only about one minute to recycle all of its ATP.
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Restriction endonucleases in bacteria may have evolved in order to
A. protect the bacteria from infection by viruses. B. carry out natural genetic engineering. C. use nucleic acids as a food (energy) source. D. All of the choices are correct.
Agromegaly is caused by hypersecretion of ________ hormone in adults.
Fill in the blank(s) with the appropriate word(s).
Microbes called the group I archaea or mesophilic Crenarchaeota that were found to oxidize ammonia in marine environments are now placed in the phylum ________.
A. Crenarchaeota II B. Euryarchaeota C. Thaumarchaeota D. Korarchaeota
What is the function of the high temperature step in PCR (polymerase chain reaction)?
A) activation of the DNA polymerase B) allowing primers to bind complementary sequences C) facilitate DNA synthesis D) deactivate DNA polymerase to pause synthesis E) break hydrogen bonds for strand separation