Question 35 – 2.2 Animal tissues, organs and organ systems - Questions

Type of dietary oil

Test 1 (s)

Test 2 (s)

Test 3 (s)

Mean (s)

Olive Oil

215

224

218

219

Coconut Oil

154

161

159

158

Avocado Oil

273

281

277

A student investigated the time taken for pancreatic lipase to break down the lipids in three different types of dietary oil.

For each type of oil, the student:

Added $cm32.0\text{ cm}^3$ of the lipid emulsion to a test tube containing pancreatic lipase and phenolphthalein indicator.
Kept the mixture in a water bath at $37∘C37^\circ\text{C}$ .
Recorded the time taken for the mixture to change from pink to colorless, indicating complete digestion of lipids to fatty acids.

The student repeated the test three times for each type of oil. The results are shown in the table below:

Type of dietary oil	Test 1 (s)	Test 2 (s)	Test 3 (s)	Mean (s)
Olive Oil	215	224	218	219
Coconut Oil	154	161	159	158
Avocado Oil	273	281	277	Z

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

2.2 Animal tissues, organs and organ systems