cDNA is made from mRNA therefore, it lacks introns and contains only the coding sequence for the functional protein
Indicate whether the statement is true or false
TRUE
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A catalase test was performed from a sheep blood agar plate on a colony of streptococci, and bubbling was observed. Which of the following statements explains this discrepancy?
a. Catalase is the inappropriate test to use on colonies of streptococci; therefore the re-sults are invalid. b. The colony may have been contaminated with sheep red blood cells, causing a false-positive result. c. The colony was most likely enterococci, not streptococci. d. No discrepancy is present. Streptococcus is a catalase-positive colony.
In Barrow, Alaska, the sun does not set for several months in the summer. Based on what you know about photoperiodism, what type of plant is most likely to flower during the summer in Barrow?
A. Long-day plants. B. Short-day plants. C. Day-neutral plants.
Most dinosaurs died out at the end of the
a. Triassic. b. Jurassic. c. Cretaceous. d. Tertiary. e. Permian.
Metabolism of uncultured organisms can be inferred from partial-genome sequence data since ________.
A. the organisms may be grown in the laboratory once the analysis is complete, and the metabolic pathways can be studied B. metabolic pathways do not vary among organisms C. comparison of genes and the proteins they encode with genes from known organisms allows researchers to gain insight into the metabolic pathways of proposed organisms D. the genomes can be spliced into vectors and the proteins made by alternative organisms