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A garage that specializes in foreign cars had a small magnesium fire when a car part was ignited. The mechanic knew from his training that he should not use water but could use a dry powder like a sodium chloride based fire extinguishing powder (MET-L-X) or a graphite based (LITH-X). He knows that the CO2 extinguishing powder is not a good choice.
1. Explain the reasons why the mechanic thinks using CO2 is not a good idea.
2. If MET-L-X or LITH-X is used, a residue could be left on the metal and if cleaned with water, the fire may be rekindled. Explain the chemical process involved in this phenomenon
Match the following definition with the correct term. Answers can be used more than once. (centriole, centromere, chromosome, chromatid, kinetochore) 1) A single, long DNA molecule containing genes.
Which number represents the atomic weight of carbon
Identify the causative organisms commonly associated with sepsis? What could be the leading organism for Jessica? Explain Vasopressors (Noradrenaline and Dobutamine) in relation to Jessica.
Demonstrate an understanding that causation is fundamental to epidemiologyExplain and apply criteria for considering causation, including temporal relation, plausibility, consistency, strength, dose-response relationship, reversibility, study design,..
How Capable Are You of Becoming Intimate
Mutations can be beneficial, deleterious or neutral. How would you design an experiment to evaluate the relative proportion of the different kinds of spontaneous mutations in an organism (2)?
A bacteria has the following lac operon genes located on the chromosome: I+P-Z-Y-A+. On a plasmid, this same bacterial cell has the lac genes I-P+Z-Y+A-. a) Which Lac proteins will be made? b) What type of protein expression (induced or constituit..
in the absence of oxygen some cells and organisms can use glycolysis coupled to fermentation to produce energy from the
Joe is suffering from a spasm in his left main coronary artery impairing blood flow to the heart. This can cause considerable pain, but what concerns us here is that delivery of oxygen to most of the heart is impaired by limiting myosin ATPase functi..
The small intestine is the site of digestion and absorption of nutrients. A single layer of epithelial cells lines the small intestine. In the duodenum (the first section of the small intestine), these epithelial cells secrete large quantities of dig..
A mutation is defined as a changein the base sequence of DNA. This may occur as a“mistake” in DNA replication, for example. Suppose that during DNA replication, two mutant DNA sequencesare produced as shown below. For the 2 mutated DNA sequences, you..
When a cell gets to a certain size and has enough organelles and available energy, it may divide into 2 identical cells. This is called Mitosis. Let's tag along in this process of cellular reproduction and review the different phases the cell goes th..
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