Mid Term Questions 1-8

LAB 1 & 2 Quizzes If you wear, contact lenses in the school laboratory: Notify your instructor that you wear contact lenses. After completing an experiment, all chemical waste should be disposed of according to your instructor's directions . In the pill bug experiment, the substance used as the control was sand. MSDS stands for Material Safety Data Sheet, TRUE. Approved eye protection devices such as googles are worn in the laboratory, anytime chemicals including water heat or glassware are used. If you do not understand the direction of part of a lab procedure, you should: ask the instructor before proceeding. A tentative explanation for some observation or some phenomenon is known as a hypothesis. Completely closed-toed shoes are encouraged but not necessary, FALSE. List in the correct order the steps in the Scientific Method: Observation, Hypothesis, Prediction, Experiment, Data/Results, Conclusion. When gathering glassware and equipment, for an experiment, you should Read all directions carefully to know what equipment is necessary. Examine all glassware to check for chips or cracks. Clean any glassware that appears dirty. *All the answer choices are correct*

Lab 2 Metric Measurement Quiz The basic measurement of ma ss is GR AM . Match the following statements with their corresponding temperatures. Freezing point of water 0 °C Normal body temperature 37 °C Water boils 100 °C Room temperature 20-25 °C The l iter is a unit of vo l ume. Remember that in science we always use the metric system and therefore your temperatures should be Celsius. When measuring any powdered chemicals using an electronic balance, one must first tare the weight of the weighing boat. TRUE Which prefix is the sma ll est, mi ll i. The basic m easurement length is m eters.

Lab 4 Enzymes Test tube E1 which had 1mL of enzyme had the least amount of enzymatic reaction in comparison to Test Tube E2 with 2mL of enzyme, TRUE. Match the reaction observed for the following reactions. Hydrogen peroxide and water – NO enzymatic reaction Catalase and water – NO enzymatic reaction Ca t a l ase and hydr o gen peroxide – LOTS of enzymatic reaction What did measuring the bubble column heights in the experiment indicate? The bubble height represents the amount of product over time as the reaction proceeds. On the figure, which letter represents the enzyme? B (the purple) BUT LOOK CAREFULLY AT THE LETTER YOU ARE CHOOSING LOOK FOR THE ONE THAT HAS “B” THAT’S THE ONE YOU WANT TO CHOOSE. On the image, which letter represents the substrate (s)? A (the brown/green entering the purple) Think of a bride and groom before marriage... BUT LOOK CAREFULLY AT THE LETTER YOU ARE CHOOSING LOOK FOR THE ONE THAT HAS “A” THAT’S THE ONE YOU WANT TO CHOOSE. On the figure, which letter represents the product ? C (the brown/green leaving the purple stuck together). Think a husband and wife “just married” Enzymes are composed of which organic molecule, Proteins.

Lab 5 Microscopy Quiz Match the following steps of the microscope use. -Step 1 Lower the stage. -Step 2 Raise the stage. -Step 3 Observe the specimen under low power. -Step 4 Observe the specimen under high power. -Step 5 Observe carefully using oil under oil immersion. -Step 6 Resolve your objective lens back to scanning. What type of microscope is being shown below? Fill in the blank. Compound Light Microscope (hint the Ocular lenses are angled) What type of microscope is being shown below? Fill in the blank. Stereomicroscope (hint the Ocular lenses are straight up)

Lab 6 Cell Structure and Function Quiz Plant cells placed in hypotonic solution will not lyse or burst. Why not? The cell wall prevents them from bursting. In this experiment, what determines whether a substance can pass through the dialysis tubing membrane? Molecular size Which solute could diffuse from the beaker into the bag? Iodine Dialysis tubing is selectively permeable this means that? some solutes will pass through, and others will not. In part 1 of the lab, you visualized two dyes and their rate of diffusion. Which of the dyes moved further and why? Methylene Blue because it had a “LOWER” molecular weight. What does the dialysis tubing represent in your experiment? A cell membrane. Tonicity, Matching. Central Vacuole gains water (Turgor Pressure) – Hypo tonic Solution Hypo tonic Solution – Cells Swell and burst (Hemolysis) Cells Shrivel Up (Crenation) – Hyper tonic Solution Hyper tonic Solution – Central Vacuole loses water (Plasmolysis) What happens when iodine is added to a solution containing starch? Iodine changes from light yellow to blue-black in color. Adding iodine solution will allow you to detect the presence of? Starch. Which solute was too large to diffuse through the membrane? Starch. Lab 7 Cellular Respiration Quiz During the fermentation experiment, what was the visible outcome that indicated formation had occurred? Carbon dioxide gas bubble was created. Fermentation requires the presence of oxygen to fully break down glucose into carbon dioxide and water. FALSE Yeast in the absence of oxygen and presence of glucose does (Fill in the blank) fermentation. Anaerobic Respiration or Alcohol or Alcoholic or Ethanol (all acceptable answers) What was the purpose of the Vernier CO2 sensor during the Rate of cellular respiration laboratory? To measure the amount of carbon dioxide. A catabolic reaction that breaks down complex biomolecules to release the energy stored within. TRUE

Bean Lab – Match Germinating beans – (Yes) Cellular respiration is occurring Dry Beans – No cellular respiration is occurring No Cellular Respiration to control equal weight – glass beads. Fermentation Lab – Match Ma lt ose + Yeast – A little of fermentation G l uc o se + Yeas t – Lots of fermentation Water + Yeast – No fermentation Lab 8 Photosynthesis Quiz What color of light is NOT absorbed by green plants? Green What was the purpose of the Vernier CO2 sensor during the Measuring the Rate of photosynthesis lab? To determine the rate of photosynthesis by measuring the “CONSUMPTION” of CO2. What plant was used to measure the rate of photosynthesis with the Vernier CO2 sensor? Elodea During the chromatography lab, what was the purpose of the chromatography solution? It’s a non- polar solution that separates components of a mixture based on their solubility. The rate of photosynthesis remained unchanged in the dark, FALSE. The chemical equation of photosynthesis is the opposite of cellular respiration, TRUE.