Gene regulation can occur at which of the following steps in the path from DNA to protein?
A. during transcription from a chromosome
B. during translation from DNA to RNA
C. after protein synthesis
D. during transcription from a chromosome
and during translation from DNA to RNA
E. during transcription from a chromosome,
during translation from DNA to RNA and after
protein synthesis
E
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Answer the following statements true (T) or false (F)
1. All tissues are composed of cells. 2. The capacity to maintain a fairly constant body temperature is a homeostatic process. 3. A community is composed of different populations of animals and plants. 4. A defining characteristic that distinguishes prokaryotic and eukaryotic organisms is the lack of a cell membrane in prokaryotes.
When RNAs separated by electrophoresis are transferred to a membrane and detected using a nucleic
acid probe the result is called a Western Blot. __________________ Indicate whether the statement is true or false.
Toward the end of the Proterozoic eon, multicellular animals emerged. The first animals were
A. Invertebrates. B. Fish. C. Chordates. D. Reptiles. E. Tetrapods.
Which of the following statements concerning the hepatitis B vaccine is FALSE?
A) It must be given in three doses. B) It is protective against the virus in 95% of vaccinated individuals. C) It is recommended for high-risk groups. D) It must be repeated every five years. E) Immunity can last at least 20 years and may be for life.