Which of the following steps are the correct order of the steps of interphase?
a.
b.
c.
d.
d.
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Restriction enzymes are an essential component of PCR
A. true B. false
If a mixture of bacteriophages, some labeled with
radioactive sulfur and others labeled with radioactive phosphorus, is placed in a bacterial culture, the bacteria will eventually contain a. radioactive sulfur. b. radioactive phosphorus. c. both radioactive sulfur and phosphorus. d. neither radioactive sulfur nor radioactive phosphorus. e. complete viruses with radioactive sulfur coats.
Which of the following can be used as vectors for cloning DNA fragments?
A. Cosmids B. Bacteriophages C. Plasmids D. All of the choices are correct.
If a lion eats a gazelle, before the molecules have been broken down by its cells, the lion has gained
A) potential energy. B) kinetic energy. C) entropy. D) respiratory capacity. E) enzymes for digesting grass.