reached. Thus in plant cells, concentration is not the only force which influences water movement.Pressure is also an important influence.Plant cells are normally turgid as turgor pressure causes the cell membrane to be firmly pressed againstthe cell wall, this provides a degree of rigidity for the cell. If the cell is placed in a hypertonic solution,the solutes do not readily cross the cell membrane, causing water to diffuse out of the cell. The loss ofwater reduces the volume of the protoplasm (everything from the cell membrane to inside the cell)causing the cell membrane to pull away from the cell wall. This phenomenon plasmolysis.View the demonstration: Plasmolysis in Elodeahttps://www.youtube.com/watch?v=c8nhJBw S08Procedure in the DemonstrationImagine you are preparing a wet mount of a young Elodea leaf. You use 3 drops of 5% NaCl to wet theslide with the young Elodea leaf and then place on the cover slip. Watch now what happens in thedemonstration (video above).Questions1. Did water enter or leave the cells when the 5% salt solution was added?2. What would you expect to happen if these cells were allowed to remain in the salt solution forseveral hours?3. Imagine you pull away the cover slip and drip 10 drops of deionized water on the young Elodealeaf, rinsing away the 5% salt solution. Plasmolysis appears to reverse. Why is this happening?4. Plants do not have a skeleton. How can you account for the upright posture of plants?5. Under what conditions do plants wilt? Explain the phenomenon using your knowledge ofosmosis. Include the words hypotonic, hypertonic, and isotonic in your explanation.We're starting the add-ins runtime, just a moment...FocusWPT✔DENG Questions1. If the potato cells were hypotonic to the surrounding solution, the surrounding solution itselfwould be what to the potato cells (hypertonic, hypotonic, or isotonic)?2. Were the potato cells submerged in water with no salt hypertonic, hypotonic, or isotonic to thesurrounding environment?3. Were the potato cells submerged in 5 g/100mL salt solution hypertonic, hypotonic, or isotonic tothe surrounding environment?4.Look at your graph. At approximately what concentration of salt solution would the potato cellshave likely been isotonic with the surrounding solution? [Tip: Estimate approximately at whatconcentration there would have been no change in the average length of potato strips.]B. Turgor and PlasmolysisYou have observed that concentration differences between cells or between a cell and its environmentcan affect the movement of water across cell membranes. This can be observed using changes in volumeor size as in the previous experiment or visually, looking at changes in appearance in the microscope, asyou will do as you explore this experiment.The cells of plants are surrounded by a slightly elastic cellulose cell wall. If a plant cell is placed in ahypotonic solution (the cell has a greater solute concentration than the surrounding medium), water willnglish (United States) Text Predictions: OnAccessibility: InvestigateO"a

We are allowed to do upto three subpart of a question please repost the undone question again. Thank…

1. Did water enter or leave the cells when the 5% salt solution was added? 2. What would you expect to happen if these cells were allowed to remain in the salt solution for several hours? 3. Imagine you pull away the cover slip and drip 10 drops of deionized water on the young Elodea leaf, rinsing away the 5% salt solution. Plasmolysis appears to reverse. Why is this happening?

1. Did water enter or leave the cells when the 5% salt solution was added? 2. What would you expect to happen if these cells were allowed to remain in the salt solution for several hours? 3. Imagine you pull away the cover slip and drip 10 drops of deionized water on the young Elodea leaf, rinsing away the 5% salt solution. Plasmolysis appears to reverse. Why is this happening?

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter22: Prokaryotes: Bacteria And Archaea

Section: Chapter Questions

Problem 15RQ: The lipopolysaccharide layer (LPS) is a characteristic of the wall of. archaean cells Gram-negative...

See similar textbooks

Similar questions

Question:- Two different patients suspected of having a urinary tract infection submitted fresh urine samples to a lab for culture and antibiotic sensitivity testing. The samples were inadvertently left out overnight at room temperature. The next day, a medical technologist discovered the samples. Upon opening the first sample, the strong smell of ammonia was noticed. The second urine sample did not have a strong ammonia smell. Based on these observations, which urine sample most likely contained cells of the bacterium Proteus Vulgaris? Explain your answer. If these two urine samples had not been noticed until a week later, would you expect there to be a difference in the “odor” of the samples? Explain your answer.
Activity 13 Urine Culture Inoculating Urine with a calibrated loop The number of microorganisms per milliliter recovered on urine culture can aid in the differential diagnosis of urinary tract infection (UTI). Plastic or wire inoculating loop available commercially, have been calibrated to deliver a known volume of liquid when handled correctly, thus enabling the microbiologist to estimate numbers of organism in the original specimen based on colony forming unit (CFU) of growth on cultures. PROCEDURE: 1st day 1. Gently swirl the specimen bottle to mix the urine specimen. 2. Label all plated media with name of patients, clinical specimen used and date. Label at the bottom of plates and not on the cover. 3. Obtain a disposable calibrated loop. 4. Dip the loop straight into the urine specimen so that the loop part is completely covered. Withdraw straight out. See fig. 16-18 5. Inoculate blood agar plate (BAP) as shown in fig.16-19 6. Incubate at 35 – 37˚C for 18 – 24 hours. 7. Dispose…
53: Which of the following most correctly describes the type of lateral pressure used during an assessment stroke? A:feather- light lateral pressure B: moderate lateral pressure C: heavy lateral pressure D: enough lateral pressure to effectively remove the deposit 54: What is the term for the dense, non-mineralized , complex mass of colonies in a gel-like inter-microbial matrix? A: feather light lateral pressure B:moderate lateral pressure C: heavy lateral pressure D: enough lateral pressure to effectively remove the deposit
Multipal Choice 1- Solution A contains more solutes than Solution B. Consequently, Solution A attracts a net flow of water. If we are interested in describing these solutions with regard to the movement of water, we would describe Solution A as (????) to Solution B -Hypoosmotic -Hypotonic -Hypertonic -Hyperosmotic --------------------------------------------------------------------------------- 2- (????) are cellular structures that have stroma filled with thylakoids stacked in granum, and are responsible for photosynthesis. -Mitochondria -Chloroplasts -Golgi bodies -Ribosomes ---------------------------------------------------------------------------------- 3- (????) is the type of RNA that assists the assembly of proteins by transferring the correct amino acid to the elongating peptide chain. -rRNA -tRNA -mRNA -18s RNA --------------------------------------------------------------------------------- I just would like to get the right correction answer,…
31. What will cause the cell to shrink when placed in hypertonic solution? A. No difference in concentration of water molecules inside and outside the cell B. Constant concentration of water molecules inside and outside the cell C. Lower concentration of water molecules inside the cell than outside D. Greater concentration of water molecules inside the cell than outside
33. Which statements concerning passive and active transport are correct? A. Both passive and active transport requires cell energy B. Passive requires cell energy while active transport does not C. Active transport requires cell energy while passive does not D. Neither passive nor active transport requires cell energy
Question:- 1. What is catalase and why do some microorganisms have it? Name two other types of bacteria that are catalale positive (you cannot use Staphylococcus spp.)
28. What could be inferred about the level of concentration of the solution inside and outside of the cell in Solution C before any movement of water had taken place? A. The percentage of solution concentration inside and outside the cell is equal B. The percentage of solution concentration inside and outside the cell is constant. C. The percentage of solution concentration inside the cell is greater than outside the cell D. The percentage of solution concentration inside the cell is lesser than outside the cell
General Electrophoresis Questions: 1. Why do we usually use agarose for DNA and polyacrylamide for proteins?2. Compare and contrast the sample buffers for DNA and protein electrophoresis.3. Compare and contrast the running buffers for DNA and protein electrophoresis.
Question 7: How could immunotherapy be used to kill superbugs and how would this therapy distinguish between bacterial cells and human cells?
Separation of Amino Acids by Thin Layer Chromatography Lab Questions 4. Why is it necessary to run TLC in a closed container and have the chamber saturated with solventvapor? 5. Why must the spot be applied to the TLC plate above the level of development solvent? 6. What will be the result of adding too much sample to the TLC plate?
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