BIO 111 TAMU lab exam 1 latest 2023 with certified solutions
Accuracy ✔✔a measure of how close a result matches a correct or standard value. For example, how close a dart is to the bullseye in a dartboard is an indicator of accuracy.
Precision ✔✔a measure of variability. For example, three darts placed close together on a dartboard indicate high precision, but if this cluster of darts is far from the bullseye it would also indicate low accuracy.
an ideal experiment ✔✔yields results with both high accuracy and high precision. Although biological and/or environmental conditions may limit one or both of these features, poor technique is an unacceptable source of errors.
Aliquot ✔✔a portion of something (noun); or to divide or transfer a portion of something (verb).For this lab, aliquot refers to an amount of liquid.
Micropipette ✔✔an instrument used to measure/deliver amounts of liquid with high accuracy and precision. Micropipettes are expensive so treat these with respect.
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Spectrophotometer: ✔✔an instrument for measuring the intensity of light that is transmitted through a sample (transmittance) or absorbed by a sample (absorbance). In this lab, you will measure light absorbance at a defined wavelength. The use of a spectrophotometer is called spectrophotometry.
Molar weight ✔✔a measure of mass. By definition, a mole is 6x1023 objects (atoms, molecules, Aggies, etc.). The mass of an object is defined by its composition at the atomic level.
Standard curve ✔✔a graph in which properties of known samples are measured and plotted. The direct proportionality of these properties can then be used to determine the same information from unknown samples. In this lab, a standard curve of Absorbance versus protein concentration will be used to determine the concentration of protein in an unknown sample.
Standard Curve Practice Problems
✔✔https://mathbench.umd.edu/modules/measurement_beerslaw/page01.htm
Molar Weight Practice Problems
✔✔https://mathbench.umd.edu/modules/measurement_molarity/page01.htm
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