Biology 1021 Final Exam Review || with 100% Correct Answers.
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Biology 1021
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Biology 1021
lab 1: What did caffeine and ethanol do to the heart rate of the Daphnia? correct answers Caffeine speeds up the heart rate and alcohol slows it down
lab 1: know independent vs dependent variable correct answers independent- one or more factors that the scientist varies during the experiment
de...
Biology 1021 Final Exam Review || with 100% Correct
Answers.
lab 1: What did caffeine and ethanol do to the heart rate of the Daphnia? correct answers
Caffeine speeds up the heart rate and alcohol slows it down
lab 1: know independent vs dependent variable correct answers independent- one or more factors
that the scientist varies during the experiment
dependent- measured in order to determine if it changes in response to the independent variable
lab 1: mean, median, mode, range correct answers mean- average, median- number in the
middle, mode- occurs the most, range- difference b/t highest and lowest values
lab 2: know what solutions are used to test for types of organic molecules correct answers
Benedict's Reagent-sugars, positive- orange-red color
Iodine- polysaccharide, positive- dark purple/black color
Biuret Test- proteins, positive- purple color
Vegetable oil- lipids, positive- 1 layer
lab 3: know the metric system and how to convert. (King Henry Doesn't [Usually] Drink
Chocolate Milk) correct answers Kilo, Hexa, Deca, Base(liters, grams), Deci, Centi, Milli
lab 3: know how to convert Celsius to Fahrenheit correct answers F=9/5 C +32
C= 5/9(F-32)
lab 3: how to compound scope the magnification equation correct answers eyepiece
magnification x objective magnification
lab 3: know the major parts of the compound microscope correct answers resolution equation:
R=.61 (lambda)/ numerical aperture
lab 3: know how to estimate the length of an object by using the value for diameter of field on a
compound microscope correct answers estimate length by it's relation to the diameter of the field
- 4200 micrometers
, lab 5: how do temp and molecular weight affect diffusion correct answers increased temp
increases the rate of diffusion, heavier molecules have slower rate of diffusion
lab 5: know what osmosis and diffusion are correct answers osmosis- net movement of water
across selectively permeable membrane
diffusion- movement from region of higher concentration to region of lower concentration
lab 5: know what happened in the dialysis bag experiment correct answers bags containing DH20
lost weight (considered hypotonic), bags containing NaCl gained weight (considered hypertonic
b/c the higher concentration moved from the beaker to the bag)
lab 5: know why salt solution plasmolyzed Elodea and what it looked like correct answers
osmosis in plants: plant cell 15% NaCl shrinks and cell wall is less viable, this due to water
moving from the plant to the salt solution
lab 6: know what an enzyme is and in the lab correct answers enzyme- is a protein that acts as a
catalyst during chemical reactions that causes the activation rate to decrease, ultimately speeding
up the reaction
lab 6: in the lab, what was the enzyme, substrate, and product correct answers enzyme- catechol
oxidase
substrate- catechol
product- benzoquinone and water
lab 6: when does an enzyme denature (what temp and pH) correct answers temperature- enzyme
starts to denature around 40 degrees, optimal pH is around 7-8
lab 6: how to determine which chart has the enzyme correct answers if a chart is shown with 2
curves, the curve with the lowest activation energy is the one that has the enzyme, because
enzymes lower activation so the reaction is quicker
lab 7: how does measuring CO2 production relate to respiration and fermentation in yeast,
geminating beans and crickets correct answers yeast- CO2 is produced for yeast and glucose
samples but not for yeast and galactose b/c glucose is needed for glycolysis the 1st step of
fermentation... Crickets- produce CO2 through aerobic respiration
lab 7: know the difference b/t aerobic respiration and fermentation correct answers --aerobic
respiration produces around 38 molecules of ATP, fermentation produces around 2 molecules of
ATP
-- fermentation does not need oxygen, respiration does
-- both produce CO2
lab 7: know what the heat of respiration represents correct answers respiration is not completely
efficient (32%) some of the energy is lost as heat
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