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Lab midterm exam
| Question | Answer |
|---|---|
| basic metric unit of length | meter (M) |
| basic metric unit of volume | liter (L) |
| basic metric unit of mass | gram (g) |
| metric conversion staircase order | kilo (K), hecto (H), deca (dam), m/L/g, deci (d), centi (c), milli, ____, _____, micron (u),____, _____, nano (n) |
| estimation of the distance an object extends between the smallest marks on the device | interpolation |
| density of H2O | 1 g/mL or cm3 |
| if object density is greater than water it will.. | sink |
| if water density greater than object it will.. | float |
| Bergmann's Rule | larger animals have smaller SA:Volume ratios and therefore are easier to keep warm in cold climates |
| formula for surface area of block | 2 (l x w) + 2 (l x h) + 2 (w x h) |
| formula for volume of block | l x w x h |
| formula for density | density = mass/volume |
| formula to find SA:Volume ratio | surface area (cm2)/volume (cm3) |
| functional group -OH | hydroxyl |
| 5 elements represented in molecular model kits | Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorus |
| atomic # of carbon, # of electrons needed to fill valence shell | atomic # - 6, 2 electrons |
| atomic # of Hydrogen, # of electrons needed to fill valence shell | atomic # - 1, 1 electron |
| atomic # of Nitrogen, # of electrons needed to fill valence shell | atomic # - 7, 2 electrons |
| atomic # of Oxygen, # of electrons needed to fill valence shell | atomic # - 8, 2 electrons |
| atomic # of Phosphorus, # of electrons needed to fill valence shell | atomic # - 15, 3 electrons |
| function of buffers | help maintain homeostasis by maintaining normal pH levels |
| how do buffers work | by releasing H ions when a base is added and absorbing H ions when acid is added |
| formula to prepare a dilution from a stock solution | C1V1=C2V2 |
| C1V1=C2V2 | C1 = concentration (%) of stock solution, V1=volume (mL) or stock req'd to prepare solution (typically solving for this), C2=concentration (%) of dilution to prepare, V2=volume (mL) of dilution to prepare |
| Benedict's reagent | light blue, tests for reducing sugars (turns yellow green/orange/red) |
| IKI (Iodine-Potassium Iodide) reagent | amber colored, tests for starch (turns dark purple/black) |
| Biuret reagent | pale blue, contains copper sulfate (CuSO4), tests for proteins (turns purplish violet color) |
| Sudan IV | tests for lipids, produces orange spot when lipid added |
| 4x objective | scanning |
| 10x objective | low power |
| 40x objective | high power |
| M1 x DFV1 = M2 x DFV 2 | M1 and DFV = magnification and diameter of field of view of first object, M2 and DFV2 = mag and diam. of 2nd object |
| formula for total magnification | total magnification = ocular x objective magnification |
| osmosis | transport of water from high -> low concentration |
| simple diffusion | membrane transport proteins not required |
| facilitated diffusion | membrane transport proteins required |
| percent mass change formula | final bag mass - initial bag mass / initial bag mass x 100 |
Created by:
ginaadkison
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