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The mediam molecular weight of eukaryotic proteins is about 40,000 daltons. A few proteins are much larger, such as a muscle cell protein called titin, which has a molecular weight of 3,000,000 daltons.
A) Estimate how long it will take a muscle cell to translate an mRNA coding for a protein of median size and one coding for titin. The average molecular mass of an amino acid is 110 daltons. Assume that the translation rate is two amino acids per second.
B) If the nucleotides in the coding portion of the mRN constitute 10% of the total nucleotides that are transcribed, how long will it take a muscle cell o transcribe a gene for a ptotein of median size versus the titin gene. Assume that the transcription rate is 50 nucleotides per second.
In humans, blue eyes are inherited as a recessive autosomal trait and color blindness is an X-linked recessive trait.
DNA and RNA are similar yet distinct components of the cell. Describe three differences between RNA and DNA with respect to their chemical composition and structure. Provide a detailed description of each characteristic you chose in your response.
Which cell processes are usually without branches near the cell of origin?
A Drosophila cross is carried out with a female that is heterozygous for both the y and bb mutations. Both genes are located in the X chromosome.
explain how the terms "ancestral" and "derived" differ from the terms "gained" and "lost." How can you have a character that is lost, but is the derived state of that trait?
Loss of 15q 12, the PWS/AS region produces different symptoms depending on the parent of origin. PWS results from the loss of paternal copies of this region. Deletion of the same region on the maternal chromosome causes AS.
Explain how adult stem cells can sense and respond to the nutritional status of an animal. Explain what kind of cues an adult stem cell can respond to, and where these cues are coming from.
Assume you perform a colorimetric enzyme assay to determine the activity of invertase in a bioreactor total volume = 1L used to produce inverted sugar.
Determine which of the following molecules would double-negative T cells fail to express?
The patient lives near the San Luis Rey River and has no history of foreign travel, blood transfusion, or intravenous drug use. What is the disease? How was it obtained.
Parasitism is a lifestyle that arose independently in multiple animal phyla. How do parasites differ (anatomically, behaviorally, and/or physiologically) from their nearest non-parasitic relatives? Provide at least two specific examples.
Assume you have a stock solution with a concentration of 722g/L. You want to make one liter of solution with a concentration of 39g/L.
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