Which of the following statements concerning ATP is FALSE?
a. It is a nucleotide.
b. It stores energy for long periods.
c. It is called the energy currency of the cell.
d. It contains phosphate groups joined in a series.
e. It contains phosphate groups joined by unstable bonds.
b
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RecA can facilitate strand exchange with a variety of substrates in vitro. Which of the following is not one of these structures?
A. a linear, single-strand DNA invading a linear duplex DNA B. a circular, single-strand DNA invading a linear duplex DNA C. a linear DNA duplex containing a single-stranded gap invading a linear duplex DNA D. a linear, double-stranded DNA invading a double-stranded circular DNA E. a linear DNA duplex containing a single-stranded gap invading a linear duplex DNA followed by branch migration to form a four-stranded intermediate
Which of the following is unique to prokaryotes?
a. UTRs in mRNA b. introns c. polysomes connected to DNA d. use of aminoacyl-tRNA synthetases e. translocation during translation
Pinnipeds have to come ashore to give birth
Indicate whether the statement is true or false
Which biome has the shortest growing season?
a. tundra b. taiga c. grassland d. desert e. tropical rain forest