__________ are evidence of life in the distant past. Fill in the blank(s) with the appropriate word(s)
Answer: Fossils
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You experimentally change the DNA sequence directly upstream of a start codon of an operon in E. coli to investigate the function of this region of DNA
Analysis reveals that after the change the same amount of mRNA is made from the operon, but there are very few proteins made from the operon. What is the most likely function of the DNA sequence that you changed? A) The DNA sequence likely functions as a ribosome-binding site. B) The DNA sequence likely functions as a promoter. C) The DNA sequence likely functions as a termination sequence. D) The DNA sequence likely functions as in transcriptional regulation.
Which one of the following structures has the greatest membrane stability?
A. cell membrane B. nuclear membrane C. rough endoplasmic reticulum D. Golgi apparatus E. mitochondria
What is the observed genotypic frequency of Aa individuals?
A) 0.144 B) 0.72 C) 0.40 D) 0.48 E) 1.44
In ? phage, which protein, the product of the cI gene, blocks the transcription required to initiate the lytic cycle?
A) cro B) repressor C) enhancer D) integrase E) operator