During DNA replication Okazaki fragments are linked together by________, an enzyme that creates phosphodiester bonds between nicked fragments of DNA
A) exopolymerase
B) DNA gyrase
C) topoisomerase
D) DNA ligase
Answer: D
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Cells taken from a tumor
A. may be used to grow viruses. B. can be cultivated in vitro indefinitely. C. may be used to grow bacteriophages. D. divide 50 times and then die. E. may be used to grow viruses AND can be cultivated in vitro indefinitely.
Bacteroids are ____
a. specialized nitrifying bacteria b. small buds from ammonifying bacteria c. specialized bacteria that help some plant roots absorb phosphorus d. enlarged and immobilized nitrogen-fixing bacteria e. interactions between plant root hairs and bacteria
A region of a chromosome on spanning the centromere is broken and reattached in the reverse direction. This is an example of which type of chromosomal defect?
A) paracentric inversion B) pericentric inversion C) pericentric translocation D) dicentric inversion E) dicentric translocation
How is summation related to IPSPs and EPSPs? What is the difference between temporal summation
and spatial summation? What will be an ideal response?