Cutting DNA with a particular restriction enzyme produces DNA fragments that can be separated by ________
A) gel electrophoresis
B) enzymes
C) recombinant DNA
D) plasmids
A
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Conjugation is a process by which the bacterial cells
a. contact each other using a sex pilus to obtain new alleles. b. contact each other for gratification purposes. c. disrupt each other d. are infected with virus e. a bacteriophage carries DNA from one bacterium to another.
Which of the following cells are alive at maturity?
a. sieve tube members b. vessel members c. tracheids d. vessel members and tracheids e. sieve tube members and vessel members
Chloroplasts are a feature of ________________
a. animal cells. b. plant cells. c. bacteria. d. all cells.
Mesophelic crenarchaeotes (Thaumarchaeota) have been isolated ________.
A. from rice paddies and lake sediment B. as symbiotes of sea sponges and sea cucumbers C. as pathogens of whales and giant squid D. from marine plankton