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A human gene was initially identified as having three exons and two introns. The exons are 456, 224, and 524 bp, whereas the introns are 2.3 kb and 4.6 kb.
a. Draw this gene, showing the promoter, introns, exons, and transcription start and stop sites.
b. Surprisingly, this gene is found to encode not one but two mRNAs that have only 224 nucleotides in common. The original mRNA is 1204 nucleotides, and the new mRNA is 2524 nucleotides. Use your drawing to show how this one region of DNA can encode these two transcripts.
In corn snakes, wild type color is brown. One autosomal recessive mutation causes hte snake to be orange and another causes snake to be black.
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Compare the activation process for T cells to that of B cells. How are they similar, and how are they different?
A fish on the outside of a school swims inward, leaving other fish on the edge. These new "edge" fish then move inward and the cycle repeats.
You are boiling water on the stove and reach over to turn the burner off. In doing so, your arm brushes against the hot kettle and your skin gets burned. You feel the pain and pull your arm back with a loud exclamation. what parts of the brain and..
Explain the structure and function of cellular organelles.There exist several examples of the eukaryotic cells. Algae, Fungi, Plants, and animals are all composed of the eukaryotic cells. Some algae and fungi are unicellular organisms.
If the fox were to feed only on insect-eating birds, how many square meters of plant material would be necessary.
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The panspermia hypothesis proposes that life did not originate on Earth, but instead arose else where in the galaxy.
In most organisms, oxygen slows down glycolysis, and pyruvate is directed towards the TCA cycle rather than fermentative pathways this is called the Pasteur Effect.
Are the shape and size of bonsai trees the result of natural selection or are the shape and size the result of the manner in which they have been managed?
you count 13 bacterial cells in the smallest square of a hemocytometer culture was diluted 1:5 prior to placing a sample on the hemocytometer. what is the density of the original undiluted culture?
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