• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Enzyme amylase action on starch

Extracts from this document...

Introduction

Jack Chen 10KM Biology Assessed Practical: Enzyme amylase action on starch Aim: To find if the amount of starch present would affect the rate at which the amylase breaks it down. Hypothesis: The more starch there is, the longer it will take the amylase to break it down; the lesser starch there is, the faster it will take the amylase to break it down. Variables: Independent variable: The amount of starch Dependent variable: The time needed for amylase to breaks starch down. Constants: Same amount of amylase, and same temperature. Equipment: Starch suspension Amylase solution Syringes Iodine solution White tile Pipette Stop Watch Safety glasses Method: Put twenty very small drops of iodine solution, spaced well apart, onto a white tile. ...read more.

Middle

Record the color that the drop goes. Start a stopwatch as soon as possible. Continue to test one drop of the starch/amylase mixture every 20 seconds, and record the color the drop goes each time. Go on doing this until the iodine drop does not change color when adding the starch/amylase mixture to it. Repeat the experiment with different amount of starch for 15cm3 and 20cm3. Table of results: Amount of Amylase (cm3) Amount of Starch Suspension (cm3) Time for starch to break down (seconds) Syringe 1 5 10 120 Syringe 2 5 15 180 Syringe 3 5 20 240 Modification: A mixture of amylase/starch suspension is dropped every 20 seconds instead of 10 seconds because it might not be enough time to let the amylase to break down the starch in only 20 seconds. ...read more.

Conclusion

Conclusion: The results proved that my hypothesis was right. The more starch there is, the longer it will take the amylase to break it down; the lesser starch there is, the faster it will take the amylase to break it down. Evaluation: There are only one thing went wrong during the experiment. I did not job down the color change during every 20 seconds when starch is breaking down. Luckily, this was not a big deal because it did not affect the results. Everything else went quite well, there were just one or two odd results made. What I did with the odd results is I compared the odd results to the normal results and found out what was wrong, and then changed it. I could improve accuracy by doing more trials; unfortunately, I did not have much time to do more trials. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Accounting & Finance section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Accounting & Finance essays

  1. What does Finance involve.

    costs only) analysis, as it tells me nothing about what sales are actually likely to be for the product at these various prices. * It assumes that fixed costs (FC) are constant * It assumes average variable costs are constant per unit of output, at least in the range of likely quantities of sales.

  2. Portfolio analysis

    to �9846 this was close to advance over �10000 and hoped next week my value of shares would be brought to over �10000. The 4th company that I had invested in was Royal Bank of Scotland last week I made a increase of �0.20p it was not much but as

  1. PEST Analysis

    This may mean that I will need to work harder in order to maintain a good quality service. The current London unemployment population is around 398,000, which is relatively small. Unemployment happens when people who want jobs cannot find them.

  2. Devils Drop

    "Come on" Becky said flashing her torch in my face. We made our way through, the woods, jumping at every leaf that crunched beneath our feet, every twig that snapped underneath our weight. "We can set the tent up at the bottom of devils drop" Becky said, leading the way

  1. Identifying and describing the main financial service needs for a student starting at university

    You can withdraw cash every day in the UK and abroad, wherever you see the MasterCard or Visa sign. You can withdraw cash as long as the principal cardholder is within his or her credit limit. You have to pay a cash handling fee of 1.5% (minimum charge �2)

  2. Business Plan for Internet Caf

    2.2 Company Start-up summary (includes Finical Plan) PROJECT COST & FINANCING SUMMARY for UIC-Ultimate Internet Caf� Project Cost Summary All values are based on best estimate from industry operating statistics, and actual professional appraisals or cost quotes from suppliers. Land $50000 Buildings $24000 Office Equipment & Furniture $4000 Other Assets (Other Categories)

  1. Business and finance

    The select current account usually charges �4.00 a month for there services. Gold service account. If you want to get more out of life then the gold service current account is right for you. The account gives you worldwide travel insurance This account also offers other key features such as * Commission free travellers cheques and currency.

  2. Management Accounting Report.

    2,000 100,000 60,000 160,000 120,000 (40,000) 3,000 150,000 60,000 210,000 180,000 (30,000) 4,000 200,000 60,000 260,000 240,000 (20,000) 5,000 250,000 60,000 310,000 300,000 (10,000) 6,000 300,000 60,000 360,000 360,000 00,000 7,000 350,000 60,000 410,000 420,000 10,000 8,000 400,000 60,000 460,000 480,000 20,000 9,000 450,000 60,000 510,000 540,000 30,000 10,000 500,000 60,000 560,000 600,000 40,000 The graph

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work