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Bio practical.
- Thread starter abayak194
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plan diagram is different
if they ask abt a detailed diagram , u r supposed to draw the things u see in the microscope.
if they ask abt a detailed diagram , u r supposed to draw the things u see in the microscope.
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you would just have to draw the nucleus and nothing else cuz other organells are not visible under light microscope!abayak194 said:
- Messages
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you are welcome!!abayak194 said:Makes sense. Thanks a lot
never draw things dat r not visible under the light microscope!
- Messages
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- Reaction score
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- 93
right! :Yahoo!:abayak194 said:
- Messages
- 2,884
- Reaction score
- 415
- Points
- 93
both the methods are correct!
- Messages
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- Reaction score
- 415
- Points
- 93
i get it!!!
actually u wont understand more arabic than I do!
actually u wont understand more arabic than I do!
WELL...there is one practical in which we hav to investigate osmosis using slides....http://www.practicalbiology.org/areas/i ... ......like this..cn anyone give me some tips on how to draw those diagrams
- Messages
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- Reaction score
- 415
- Points
- 93
chk forums again !i've uploaded some notes too!
As in physics, the uncertainty is same as the least count...the error is half the least count in chemistry........there's xplaination for this.....So in biology...both are correct??? how can that b.....mary jones says half the least count.....mark scheme says same as the least count....so if both are correct, could u plz xplain?
Hey all.. Yhe 4 2mrw We might have Urease... N Transverse Section of leaf.. Hopefully..
http://www.scienceinschool.org/print/607 a link realted to enzymes urease.....
Ok Duh we're getting urease & urea tomorrow in Bio 33, Now what wud be the Improvements, Sources of error & Limitations for the experiment below?
Enzyme Concentration
In this investigation, we will examine what happens to the rate of a reaction when the amount of enzyme is reduced. We will use urease, an enzyme that converts urea to ammonia. The ammonia causes the pH of the water to increase (it becomes more basic). You will be able to tell when a reaction occurs because the urea solution also contains a pH indicator that is becomes yellow in acid but turns red when the solution becomes basic.
The object of this experiment is to measure the amount of time it takes for the solution to turn red if less enzyme is used.
C1. Create a hypothesis regarding the the amount of urease and the rate of reaction of Urea.
C2. Obtain four test tubes and add 2 cm of urea to each.
C3. Label three of these tubes 1 through 3; the remaining tube will not be used; it will serve as a control.
C4. Have your lab partner start timing as you add 15 drops of urease to tube #1 and then swirl the tube until it changes to a red color. Record the amount of time that it took for the urease to change to a red color.
C5. Add 5 drops of urease to tube #2 and then swirl the tube until it changes to a red color. Record the amount of time that it took for the urease to change to a red color.
C6. Add 1 drop of urease to tube #3 and then swirl the tube until it changes to a red color. Record the amount of time that it took for the urease to change to a red color.
C7. Record your results in the answer sheet.
C8. Did using less enzyme produce a reaction?
C9. What was the effect of using less enzyme in your experiment? If your experiment did not work as expected, what should have happened?
C10. In general, what happens to the rate of reaction as the amount of enzyme is decreased?
C11. Do your results support your hypothesis? Explain.
http://www.scienceinschool.org/print/607 a link realted to enzymes urease.....
Ok Duh we're getting urease & urea tomorrow in Bio 33, Now what wud be the Improvements, Sources of error & Limitations for the experiment below?
Enzyme Concentration
In this investigation, we will examine what happens to the rate of a reaction when the amount of enzyme is reduced. We will use urease, an enzyme that converts urea to ammonia. The ammonia causes the pH of the water to increase (it becomes more basic). You will be able to tell when a reaction occurs because the urea solution also contains a pH indicator that is becomes yellow in acid but turns red when the solution becomes basic.
The object of this experiment is to measure the amount of time it takes for the solution to turn red if less enzyme is used.
C1. Create a hypothesis regarding the the amount of urease and the rate of reaction of Urea.
C2. Obtain four test tubes and add 2 cm of urea to each.
C3. Label three of these tubes 1 through 3; the remaining tube will not be used; it will serve as a control.
C4. Have your lab partner start timing as you add 15 drops of urease to tube #1 and then swirl the tube until it changes to a red color. Record the amount of time that it took for the urease to change to a red color.
C5. Add 5 drops of urease to tube #2 and then swirl the tube until it changes to a red color. Record the amount of time that it took for the urease to change to a red color.
C6. Add 1 drop of urease to tube #3 and then swirl the tube until it changes to a red color. Record the amount of time that it took for the urease to change to a red color.
C7. Record your results in the answer sheet.
C8. Did using less enzyme produce a reaction?
C9. What was the effect of using less enzyme in your experiment? If your experiment did not work as expected, what should have happened?
C10. In general, what happens to the rate of reaction as the amount of enzyme is decreased?
C11. Do your results support your hypothesis? Explain.