2.2 Animal tissues, organs and organ systems

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Question 10
Easy

A student investigated the time taken for amylase to completely break down the starch in three different varieties of potato.

For each variety of potato, the student:

  • Added a uniform 1 cm31\text{ cm}^31 cm3 cube of boiled potato to a test tube containing amylase solution.
  • Kept the mixture in a water bath at 37∘C37^\circ\text{C}37∘C.
  • Tested samples with iodine solution every 10 seconds to determine when all the starch had been digested.

The student repeated the test three times for each potato variety. The results are shown in the table below:

Variety of potatoTest 1 (s)Test 2 (s)Test 3 (s)Mean (s)
Maris Piper124118121121
King Edward142148145145
Sweet Potato188196192Y

Calculate the value of Y in the table. Show your working.

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2.2 Animal tissues, organs and organ systems Questions

  1. GCSE
  2. /Biology
  3. /2.2 Animal tissues, organs and organ systems