Week 1 Part 1
Independent vs. dependent variable?
Independent = manipulated; dependent = outcome
Examples of Personal Protective Equipment (PPE)?
Gloves; apron; goggles
Polar vs. non-polar covalent bond?
Polar = does not share electrons equally
Non-Polar = shares electrons equally
What do animals use fat for?
Storage and insulation
Diffusion vs. Osmosis?
Diffusion = movement of substance; Osmosis = water
Positive vs. Negative control?
Positive = expect a change to occur; Negative = do not expect a change to occur
Scientific notation for 0.45?
4.5 x 10^-1
Atomic number vs. Atomic mass?
Atomic number = # protons
Atomic mass = # protons + # neutrons
How did we virtually test for macromolecules?
Used indicator solutions to test presence/absence of macromolecules
_____ transport moves molecules against concentration gradient.
Active transport
Science = testable, falsifiable, modifiable; science is based on claims, evidence, and reasoning; pseudo-science claims scientific support but no evidence/doesn't survive testing.
How many sig. digits in 807?
3
Bonding of O2 vs. N2?
O2 = double bond; N2 = triple bond
DNA building block components? Type of bond? Antiparallel?
Nucleotide = phosphate, sugar, and base. Bonding = phosphodiester bond. Antiparallel = strands arranged in opposite but parallel ways.
What was purpose of experiment with sucrose in a dialysis bag?
Observe and predict movement of water across a semi-permeable membrane.
Hypothesis vs. Null hypothesis? Experimental vs. control?
Hypothesis = prediction; Null = statement that assumes no difference that we test against; Experimental = receives manipulation; control = no manipulation.
Accuracy vs. Precision
Accurate = what you expect to happen
Precision = similar values
Purpose of Virtual chromatography experiment?
Separate mixtures from a substance
2 types of lenses in light microscope?
Ocular; Objectives
What was the purpose of experiment with glucose and starch in dialysis bag?
Observe if glucose and starch will move across a semi-permeable membrane.
5 sections of a lab report and overview of each?
Some characteristics to Classify Organisms? (Lab 9 Hierarchies of Life)
Answers vary (e.g. presence/absence of nucleus, unicellular or multicellular, mobile or non-mobile, etc).
Formula for Retention Factor (Rf)?
Distance traveled by sample/distance traveled by solvent
4 types of microscopes?
Stereo (dissecting) = large specimens; Light Microscope = small specimens w/ visible light. Scanning Electron Microscope = small, dead specimens w/ electrons. Confocal = small, live specimens with florescence
Tell me 1 practical scenario for testing macromolecules
Answers vary