WK1ASSGN_MCCALLUM_T

Question: Name Class Date Scientific Method Review

Please answer the given questions. Thank you.

PRE-LAB ASSIGNMENT #2: CUMULATIVE PERCENT CHANGE AND RATE PRACTICE PROBLEMS To be completed before beginning week two of the Osmosis and the Scientific Method Lab. 1. The following data were collected during a study of the effect of potassium chloride (KCI) .solute concentrations on osmosis in a potato core over a period of 60 minutes. Table 1: Mass (grams) of potato cores in different concentrations of KCI 0 Minutes 20 Minutes 40 Minutes 0% KCI 1% KCI 4% KCI Cumulative % Change 6.2 6.5 6.3 = For 0% KCl at 0 min: a. Use the data in Table 1 and the formula for percent change in mass to complete Table 2 below. The first two calculations have been done for you as examples. 6.3 6.6 6.1 Table 2: Cumulative percent change in mass of potato cores in different concentrations of KCI 60 Minutes 0 Minutes 20 Minutes 40 Minutes SARA 0% KCI 0 1% KCI 4% KCI 6.2-6.2 6.2 6.5 6.6 5.8 Mass (current time point) - Mass (time point zero) Mass (time point zero) For 0% KCl at 40 minutes: Lab Exercise 3 X 100…

Direction: Read and analyze the following laboratory experiment and answer the following question. PART 1: SURFACE AREA AND CELL SIZE Materials: Agar containing NaOH, and the pH-indicator dye phenolphthalein cured into cubes of various size, 3 plastic cups, HCl, metric ruler, paper towels. Methodology: 1. Safety: Wear goggles and nitrile gloves while completing this lab. 2. Obtain three different size blocks of pink or blue agar. Using a ruler, measure the length, width, and height of the three blocks given below. Cut the agar according to the given dimension. Small = 1 cm x 1 cm x 1 cm Medium = 2 cm x 2 cm x 2 cm • • Large = 1 cm x 1 cm x 6 cm 3. Record your data. 4. Pour HCl or vinegar into two small cups. Place the one larger "cell" into one cup and the two smaller cells in the other cup. Start timing 30 minutes. 5. After 30 minutes, remove the cells and blot them dry with a paper towel. 6. Using your ruler, measure the distance the HCl has diffused into the blocks as shown on the…

al - Seattle x S WRLD LIT COMP 10A: Identity Sound+of+Wa x Identity Sound+of+Wa x S Forrar (wrap) y decorar S Scho A districtIms.seattleschools.org/common-assessment-delivery/start/5398502362?action=onresume&submissionld=657119921 Concentration, Osmosis, and Cell Environments HW Quiz Assume that the picture below shows environments on two sides of a selectively permeable membrane. Assume the light blue circles are water molecules. Assume the red circles are glucose molecules. Which side has the higher concentration? left right Which best describes the way that the particles move?

Subjective questions Question 1: Please consider the following questions related to osmosis. Intravenous solutions (IV Fluids) must be prepared so that they are isotonic to red blood cells. A 0.9 % salt solution is isotonic to red blood cells. a. Explain what will happen to a red blood cell if placed in a solution of 99.3% water and 0.7% salt? b.Explain what would happen to a red blood cell if placed in a solution of 90% water and 10% salt? Question 2: Consider the cell membrane in the below figure.

Question: Bacterium is gram positive, bacillus, single, short chain. How to determine the bacterium step by step through biochemical tests? Bacteria pool: B. cereus, B. subtilis, B. megaterium, C. perfringens, M. phlei, L. acidophilus, C. butyricum, C.sporogenes, L. lactis

question: Can you summarize and explain for me what you want to tell in the article below? Can you explain the figure?  When I read it myself, I do not understand exactly what is meant by the article. It would be nice if you could highlight the important points. You can use them in a figure or diagram to explain. thank you and hava a nice day :) Article:  Nanotechnology Tools to Inactivate SARS-CoV-2 in Different Environments Outside the Patient SARS-CoV is highly stable at room temperature and at 4 °C, but it is inactivated by ultraviolet light at 254 nm, highly alkaline or acidic conditions of pH >12 or pH <3, respectively, or by brief (e.g., 5 min) heat treatment at 65 °C. SARS-CoV-2 is expected to be similarly sensitive. Several human coronaviruses can be inactivated by classical disinfectants, including bleach, ethanol, povidone-iodine, chloroxylenol, chlorheximide, and benzalkonium chloride, so we expect similar inactivation with SARS-CoV-2. The virus stability on surfaces…

question: Can you summarize and explain for me what you want to tell in the article below? Can you explain the figure?  When I read it myself, I do not understand exactly what is meant by the article. It would be nice if you could highlight the important points. You can use them in a figure or diagram to explain. thank you and hava a nice day :) Article:  Nanotechnology Tools to Detect SARS-CoV-2 Standard procedures for detecting the virus from nasopharyngeal and/or oropharyngeal swabs have been reviewed recently and are primarily based on reverse transcription polymerase chain reaction (RT-PCR). Here, we would like to mention some preliminary ideas on nanotechnology-based assays to monitor the presence of SARS-CoV-2. A simplified test and variants thereof to detect viral proteins (e.g., HIV or influenza virus) without the need for expensive equipment is based on the color change of Au NPs bound to antibodies. Similar to the enzyme-linked immunosorbent assay (ELISA) antibodies coupled…

b of 35 00:00 Bacteria In the petri dish in Figure 1, the bacteria Esherichia coli (E. coli) was grown and treated with disks soaked in different substances. Disk A was soaked in hand sanitizer, Disk B left untreated and Disk C was soaked in bleach Which disk most likely is the control disk? O A O B 10 Nevt

Please answer the questions in the grey colored box provided in the image.

I dont understand please help!

Experiment Title: Cytotoxicity Test Experiment no. 2 Objectives: Study the eytotoxicity and how it is measured. 1- Background Cytotoxicity can lead healthy living cells to three potential cellular fates. 1. Neerosis (accidental cell death): Rapid loss of membrane integrity and cell lysis 2. Apoptosis (programmed cell death): slower, more orderly, and genetically controlled 3. Cytostasis (a decrcase in cell viability): cells remain alive but fail to actively grow and divide Importance of measuring cytotoxicity two major reasons 1. Either you want specific cells to die look for an adequa compound/condition (cancer and immotherapy) 2. Or you want to exclude cyto icity in specific cells (chemicals and drugs) 1 have a report on this subject, please solve Applications - Drug discovery proces - Oncological research - Safety evaluation of pesti ides, plantextracts, food additives, cosmetics, and my topic. industrial chemicals my Classification of cytotoxicity and cell viability assays These…

Please make an observation. Thank you

I need answers

Situation: In the emergency room, you are admitting a newborn who has physiologic jaundice, an adult with complaints of chest pain, and a teenager with cramping legs.   questions: 1.What enzyme is not sufficient to the newborn resulting to his yellowish discoloration? What caused the insufficient enzyme that is correctly identified? 2.Give 1 enzyme that you do not want to expect from the client complaining of chest pain. and If in case that enzyme is present in the blood or elevated... what cardiac condition may the patient be suffering from?

1-6

9. What relationship exists between molecular weight and the rate of diffusion?

Questions: 1. Are there any recorded results in table A or B that don’t match the expected outcome? If yes, what are they and what should’ve been the result? Why? 2. From the data in table A, what amino acid(s) does gelatin contain?

I am struggling with drawing and annotating of dissected sheep's heart. I would like to see how experts draw and annotate sheep heart and answer the questions.

Please help with this

Answer the image provided please.

Direction: Read and analyze the following laboratory experiment and answer the following question. PART 3: PLASMOLYSIS Materials: safety goggles, red onion, dropper, slides & cover slips, tweezers/ forceps, compound microscope, iodine, small knife, water, salt (5% and 10% solution) Methodology: 1. With goggles on, carefully cut the onion into wedge shaped pieces using a knife. 2. Use an eye dropper to place a drop of water in the center of a microscope slide. Use the tweezers to peel a thin layer of skin tissue from the thick part of the onion wedge and place it in the center of the microscope slide. 3. 4. 5. Add a drop of water and a drop of iodine over the onion tissue on the slide. Carefully lower a cover glass slip at an angle on the stained tissue to allow air bubbles to escape. 6. Examine the prepared slide under the compound microscope at 100X magnification. 7. Record what the cells look like. 8. Prepare a 5% salt solution by adding 5 grams of salt (measure with balance) per 100…

Size Options: P20 P200 P1000 P5000

Please answer questions 2-4 in the attached photo

Please send me the question in 20 minutes it's very urgent plz question num 4

QUESTION: Microbes from a blood culture inoculated with blood drawn from a catheter were determined by the appearance of growth on Mannitol Salts Agar and through other tests to be Staphylococcus epidermidis. It can be concluded that: a.  a bloodstream infection caused by S. epidermidis is occurring in the patient from whom the blood was drawn b.  The bacteria fermented mannitol, changing the color of the growth medium from pink to yellow. c  S. epidermidis is present in the sample as a normal flora contaminant d.  That in order to determine if a bloodstream infection is present, these results must be compared to a blood culture of a sample drawn from a peripheral vein

16. Your Excel data graph for Serial Dilution lab:** 16a. Include a clear and labeled graph of DF (x axis) versus Absorbance (y axis). See box above for expectations and review video tutorial of this Excel work. Do not graph two of your data points: your blank or your Cuvette #1 (DF=1). 1 Q A Multiple Styles W S X 3 E D $ 4 To C R F % 5 I T V U ^ 6 G Y 7 H U 8 J BN S ( 9 K M X