01 Pipettes Pre Lab Quiz 1 What type of pipet is shown below C Serological D Mechanical Correct Answer A 2 What is the maximum volume the pipet below can hold mL Just type in the volume not the units 02 Spectrophotometer Pre Lab Quiz 1 When calibrating the spectrophotometer the zero and 100 settings are determined using Correct Answer 10 0 Correct Answer B 2 Which knob button labeled in the image below controls the wavelength of the spectrophotometer A Volumetric B Mohr e g 3 5 not 3 5 ml A Absorbance B Transmittance A A B B C C D D E E 03 Enzymes Pre Lab Quiz 1 An enzyme increases the rate of a reaction by lowering the activation energy of that reaction Correct Answer C Correct Answer True 2 Catechol oxidase catecholase A Changes the free energy difference G between reactants and products B makes catechol and water C has benzoquinone as its substrate D increases the rate of oxidation of catechol 04 Data Presentation Pre Lab Quiz 1 Which of the following is are discrete data Choose any that are discrete data A The number of freshmen at LSU this semester B The height of the students in your section of biology lab C The number of lab meetings this semester D The time it will take to do this week s lab 2 The dependent variable is plotted on the axis of a graph Select one Correct Answer D Correct Answer A C Correct Answer B 3 How would you improve the graph shown above before inserting it into a lab report select all that A X B Y apply A Add more information to the axis labels B Add a title above the graph C Add a caption below the graph D Remove the lines connecting the points E Use a best fit trendline F Use absorbance ODU for the y axis instead of E coli number Correct Answer C D E Your Response A B C D E F 4 You have measured the number of an invasive fish species caught in a sampling net every month for the past 3 years You want the number caught in January of last year A Graph B Table A Graph B Table A Graph B Table 5 You have measured the number of an invasive fish species caught in a sampling net every month for the past 3 years You want to know if that fish population is growing exponentially rapidly doubling or if the number has plateaued Correct Answer B Correct Answer A 6 You have data from an experiment that shows the amount of fermentation that occurs in a reaction at 10 20 40 80 and 160 minutes You need to estimate how much fermentation occurred at the 2 hour point of the experiment 05 Scientific Method and Experimental Design Pre Lab Quiz 1 The manufacturers of Tomato Maker Fertilizer claim that their fertilizer will increase the productivity of tomatoes fruits if used as directed To test this a researcher applied the fertilizer to tomato plants over the course of 10 weeks Productivity was determined by the mass grams of the fruits produced Identify the dependent variable in this experiment A Mass of fruit produced B Tomato Maker Fertilizer C Water D Sunlight Correct Answer A 2 How many variables should you be manipulating during an experiment Correct Answer A Correct Answer One 3 A young forester wanted to find out why bald cypress trees are normally found only in swamps A major feature of a swamp is the presence of standing water throughout much of the year To test whether living in standing water helps cypress trees grow rapidly he built a shallow pond in the middle of a very large pasture Then he planted 100 cypress trees in the pond standing water and 100 cypress trees in an adjacent pasture semi dry upland soil Both plots were of equal size 0 2 hectare a Write the Null Hypothesis for this experiment Correct Answer Your Response The presence of standing water is unrelated to cypress trees growing rapidly 4 Write the Alternative Hypothesis for this experiment Correct Answer Your Response If cypress trees live in standing water then they will grow rapidly 5 what is the Independent variable Correct Answer Your Response The independent variable is the presence of standing water 6 what is the Dependent variable Correct Answer Your Response The dependent variable is the rate of growth of the cypress trees 7 Is there a Control If so what is it Correct Answer No Your Response Yes The control is the 100 cypress trees planted in semi dry upland soil 8 Are there Replicates If so how many Correct Answer Yes 100 Your Response No there are no replicates 06 Specific Enzymatic Analysis Pre Lab Quiz 1 What is your null hypothesis H0 Correct Answer Your Response If the enzyme concentration changes then the reaction rate will not change 2 What is your alternative hypothesis HA Correct Answer Your Response If the enzyme concentration changes then the reaction rate will change 3 Will your experiment have a control A Yes B No 4 What units will be used to report your results A rate of reaction B absorbance rate Correct Answer A C enzymatic velocity D catechol production Correct Answer A 07 Data Analysis and Presentation Pre Lab Quiz 1 If you measured the length of an object you could be certain this value would be indicative of A Great accuracy B Great precision C Both great accuracy and precision D Neither great accuracy nor precision 2 If you measured the length of an object 3 times using the same ruler and got the same value each time then you could be certain this would be indicative of A Great accuracy B Great precision C Both great accuracy and precision D Neither great accuracy nor precision 3 If you measured the length of an object 5 times using the same ruler which you checked against a standard length Each measurement of the object gave the same value you could be certain this would be indicative of A Great accuracy B Great precision C Both great accuracy and precision D Neither great accuracy nor precision Correct Answer D Correct Answer B Correct Answer C 08 Descriptive Statistics Pre Lab Quiz 1 The hypothesis is rejected when treatments are significantly different from one another A Null B Experimental C Alternative D Universal Correct Answer A 2 Standard deviation is A A measure of how well the data represents the population B Can be calculated by dividing the mean by the sample size C A description of how much variation there is in a data set 3 Examine the following graph of 4 different treatments for a 3 minute endpoint of an enzyme assay The data are based on the means and standard deviations from 5 replicates Correct Answer C Which of the following could you conclude with any certainty from this experiment A All treatments had the same effect B All treatment had