BIO 111 LAB EXAM REVIEW QUESTIONS AND ANSWERS 2023

Independent Variable Variable that the experimenter changes in an experiment Dependent Variable Variable that is being measured in an experiment Brainpower Read More Null Hypothesis The hypothesis that there is no significant difference between specified populations, any observed difference being due to sampling or experimental error Alternate Hypothesis The hypothesis accepted to be true if the null hypothesis is rejected based on statistical evidence. Hypothesis A supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation: Scientific Method How science and people try to understand the world around them Function of Iris Diaphragm Contains the amount of light that can enter through to the specimen Function of the Condenser Used to focus light on the specimen you are examining. Lipids are: nonpolar Contrast The apparent differences of images against a background Control Groups Groups that are unaltered by variable being tested, use for comparison Magnification Factor by which an image is magnified Resolving Power Extent to which detail is preserved during magnification Phase Contrast Scopes Transforms phase shifts caused by light passing through different objects into different light intensities Transmission Electron Scopes Transforms differences in the stream of electrons passing through different objects into different light intensity Scanning Electron Microscope Electron beams directed upon gold or platinum plated surfaces cause scattering of additional electrons Parfocal When an objective has been focused, you can rotate to another one, and the image image will remain in course focus , requiring only slight movement of fine course nob Parcentral Center of the field of view remains about the same for each objective Field of View Circle of Light you see when looking into the microscope Working Distance Space between the objective lens and the slide What is ratio of carbon, hydrogen and oxygen for glucose and other sugars? 1:2:1 What are the levels of magnification? 4, 10, 40, 100 How many micrometers in a millimeter? 1000 How many micrometers in .001 millimeters? 1 Micrometer Measures light years Microscopic Anything that is to small to be observed with human eye The letter "e" was _______ which means upside down and backwards. Inverted Robert Hooke view on microscopes Looking under microscope "looks like little mushrooms" How to make a wet mount: Take a longer slide and place a few drops of water ( maybe some type of sample with water) and then put a shorter cover slide over Vitamins Vital or necessary for life What is empirical formula for a carbohydrate? (CH2O) What are the building blocks of carbohydrates? Monosaccharide What process does a monosaccharide go through to become a disaccharide? Dehydration Synthesis What is it called when there are two monosaccharaides joined together? Disaccharide Many monosaccharaides joined together form a __________. Polysaccharide