Which of the following supplies the greatest percentage of total energy for mankind?
a. natural gas
b. nuclear energy
c. petroleum
d. coal
e. renewable energy
C
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Gram stain is used to distinguish between different
(a) bacteria. (b) protistans. (c) dinoflagellates. (d) all of the above.
A polylinker is a:
A. synthetic DNA fragment that contains multiple restriction enzyme sites. B. synthetic DNA fragment inserted into a vector that allows replication of the vector in the host cell. C. DNA sequence that allows for selection of cells that contain the vector. D. molecule used to ligate DNA fragments together. E. synthetic DNA fragment used in colony hybridization to visualize colonies that contain the DNA of interest.
The codon is found in the:a
mRNA. b. nontemplate strand of DNA. c. template strand of DNA. d. tRNA. e. rRNA.
In E. coli, to repair a thymine dimer by nucleotide excision repair, in which order do the necessary enzymes act?
A) nuclease, DNA polymerase III, RNA primase B) helicase, DNA polymerase I, DNA ligase C) DNA ligase, nuclease, helicase D) nuclease, DNA polymerase I, DNA ligase