Ribosome movement along the mRNA is called
A. initiation.
B. replication.
C. activation.
D. transcription.
E. translocation.
Answer: E
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Copies of chromosomes linked together at their centromeres at the beginning of meiosis are known as ____
a. mother chromosomes b. daughter chromosomes c. sister chromatids d. homologous chromatids e. analogous genes
Based on the following graph, what is the most likely relationship between Paramecium and Didinium?
A. Didinium prey on Paramecium. B. Paramecium is a parasite that feeds on Didinium. C. Didinium and Paramecium have a mutualistic relationship. D. Paramecium have a commensal relationship with Didinium. E. Paramecium prey on Didinium.
The initial experiment of Koga and Fugatsu, in testing for any bacterial cause of aphid color change, involved all of these except
A. the specific amounts of red and green pigment molecules were initially measured as dependent variables. B. a group of green aphids was grown, then killed in order to produce an extract to test on red aphids. C. a group of red aphids was treated with the independent variable of Rickettsiella bacteria infection from green aphids. D. a group of red aphids was grown as a control group. E. a group of aphids infected with Rickettsiella bacteria was grown, then killed in order to produce an extract to test on red aphids.
Protective features of the skin include all of the following except ________.
A. a keratinized surface B. high pH C. high salt content D. resident biota E. lysozyme