How is an open reading frame (ORF) identified and used to determine the sequence of amino acids in the gene it encodes for?
What will be an ideal response?
Answer: An ORF is often predicted by identifying a start codon, followed by a nucleotide sequence, and a terminating nonsense codon in the same reading frame. From the ORF sequence, the amino acid sequence can be predicted by translating each individual codon, which aids in predicting biochemistry and function of the predicted protein.
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Consider a community composed of grasses, prairie dogs, mice, bison and coyotes. Which of these organisms would be found at the bottom level of the trophic pyramid for this community?
A. coyotes B. bison C. prairie dogs D. mice E. grasses
The structure designated by the letter "B" in the above figure is called the ____
a. pyloric sphincter b. esophagus c. small intestine d. duodenum e. appendix
Respond to statements 94 – 98 with reference to the types of
connective tissue listed below. a. loose tissue b. dense tissue c. adipose d. cartilage e. blood E 94. Tendons are composed of this. E 95. The elasticity of skin is due to the presence of this kind of tissue. M 96. This tissue plays an important role in stabilizing body temperature. E 97. This tissue provides nourishment to each of the other connective tissues. M 98. This tissue plays a particularly important role in the thermoregulation of many marine mammals.
A coliform bacterium that contaminates dairy products is _______.
A) Bartonella B) Serratia C) Enterobacter D) Proteus