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A: You do an experiment in which you add oxaloacetate uniformly labeled with14C (ie withequal amounts of 14C in eachof its carbon atoms) along with unlabeled acetyl-CoA to an extractof mitochondria. After a single pass through the TCA cycle, whatfraction of the original radioactivity will be found in the oxaloacetate?B: The TCA cycle is sometimes described as the major pathway of aerobic catabolism, which means that it is an oxygen-dependentprocess. However, none of the reactions of the cycle directlyinvolves oxygen as a reactant. Why is the pathwayoxygen-dependent?
What is the stage of early embryonic development where the cells aggregate together to form a single mass of cells where individual cells are no longer distinguishable.
A two year old boy is being seen through a hematologist. The child's symptoms include the sudden onset of high fevers, thrombocytopenia, epistaxis.
Sort the parts of a nucleic acid according to whether each occurs exclusively in DNA, exclusively in RNA, or in both types of nucleic acid.
Comparisons of amino acids sequences can shed light on the evolutionary divergence of related species. Would you be expecting all the proteins of a given set of living species to demonstrate the same degree of divergence.
Determine what cells in the testis are responsible for the maintenance of a blood-testis barrier that protects sperm from being attacked by the immune system?
Assume you have 5mL of cells you need to treat with Hydrogen Peroxide, such that the final concentration of Hydrogen Peroxide is 5uM. How much of a 10mM stock solution of Hydrogen Peroxide would you add to your cells?
Compare and contrast the mechanisms of transcription initiation in prokaryotes and eukaryotes. Suppose you were to count one coliform colony produced from a 10 ml water sample.
Which blood vessels bring blood into the glomerulus?
Researchers want to identify the impact of cholesterol on the development of heart disease. They follow individuals who are vegan, and meat-eaters for ten years and they record if any of them experience a heart attack.
Define the term absorption. Explain the importance of the surface area to volume ratio as afactor limiting cell size
Discuss the effects of urban heat islands on regional ecosystems - Does Cowles view the systems via holism or reductionism? What is the single philosophical concept that emerges from his work?
Set up the suitable two-by-two table and determine a measure of association between current smoking and myocardial infarction. Determine a measure of the excess risk of myocardial infarction in cigarette smokers that is attributable to their smoking.
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