As part of your independent study in field biology, you are sent to a small, inland sea. In one of your samples, you discover a small eel-like creature. It has a stiff, rod-shaped structure running the length of its dorsal side, with a line of nervous
tissue running along with it. You would begin the process of classifying this organism by placing it in phylum:
A) Vertebrata. B) Cnidaria. C) Arthropoda. D) Mollusca. E) Chordata.
Refer to the scenario below, and then answer the following question(s).
As part of your independent study in field biology, you are sent to the seashore to take samples. In one of your samples, you discover a flexible, sessile creature. It looks somewhat plant-like, but then you notice a polyp that is producing medusa-like animals.
Answer: E
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Chemical germicides
A. may react irreversibly with proteins/enzymes. B. may react with cytoplasmic membranes or viral envelopes. C. may be disinfecting or even sterilizing. D. are sensitive to dilution factor, time of contact, and temperature of use. E. All of the choices are true.
RNA polymerase has several jobs during the transcription process. Which of the following is not a job that it performs?
A. RNA polymerase binds to the promoter region to start transcription. B. RNA polymerase unwraps small segments of DNA to expose the template strand to be transcribed. C. RNA polymerase edits the mRNA strand by removing some sections and splicing together remaining sections. D. RNA polymerase makes a complementary mRNA strand by adding RNA nucleotides.
Plasmids
a. are circular molecules of DNA. b. are sites for inserting genes for amplification. c. may be copied by bacterial replication enzymes. d. will become larger when foreign DNA is inserted. e. all of these
An example of a nucleic acid would be...
a. Fructose. b. Wax. c. RNA. d. Steroid.