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An enzyme isolated from a mutant bacterium grown at 20 degrees celsius works in a test tube at 20 degrees celsius but not at 37 degrees celsius( 37 degrees celsius is the temperature of the gut, where this bacterium normally lives). Furthermore, once the enzyme has been exposed to the higher temperature, it no longer works at the lower one. The same enzyme isolated from the normal bacterium works at both temperatures. Can you suggest what happens at the molecular level to the mutant enzyme as the temperature increases?
In patients with left ventricular failure and reduced ejection fractions, the risk of LV thrombus formation and systemic arterial embolization appears to be primarily in patients
Q. How many cellular nuclei does the pollen tube of angiosperms have? What is ploidy of each of these nuclei? The pollen tube explicitly the mature male gametophyte of angiospe
For each of the following stages, state the number of nuclear DNA molecules in one of your cells (i.e., 23,46, or...) and its ploidy (i.e.,n, 2n, or...). 1.) Prophase of mitosis
In general compare and contrast the three functional classifications of joints according to movement. What are two characteristics that make synovial joints unique and different fr
Signal transduction occurs when an extracellular signaling molecule activates a cell surface receptor. In words, this receptor change intracellular molecules changes a response. Th
Acquired immunodeficiency syndrome (AIDS) is the collection of disorders which develop as a result of the infection by human immunodeficiency virus (HIV), which attacks the helper
What is Microtubules? Microtubules are the largest intracellular fibers, with a diameter of about 25 nm (2.5 x 10-8 meters). They consist of hollow fibers composed of a protein
Steps for Conversion of food Conversion of food is done in four steps: 1) Ingestion, mastication and swallowing: Ingestion or taking in of food and mastication are done b
What are epithelial tissues? What are their general function and how is that function associated to the features of the tissue? Epithelial tissues, also known as epithelia, are
E. coli DNA has a MW of about 2.7 x 10^9 Daltons. How many meters long is this molecule and what does this tell you about the state of the intracellular DNA? ( The lenght of a sing
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