1. WHAT’S IN MY FOOD?
APPLE
Image Credit: http://2.bp.blogspot.com/
Image credit: http://farm4.static.flickr.com/ _uqBx13aymCE/TC704swH-7I/AAAAAAAACjc/
3224/2350015548_36c1d71a1d.jpg
qG2n3U4Frvg/s1600/3458436097_2a23292044.jpg
By Yuki Ueno Peters

2. WHY DID I CHOOSE THIS
FOOD?
I chose this food because I thought
that if I were to investigate an article
of food, why not look at something
that I eat frequently, so the next time
I eat it, I will be completely aware of
what exactly I am eating?
I am going to look at
1 apple. Unit:
Apple(s)

3. SOURCE FOR NUTRITION
INFORMATION
Image
credit:
http://
www.bioch
em.uwo.ca/
fac/yang/
coloured_te
st_tubes.jpg
Source for Nutrition Information:
My Experiment for Starch, Glucose, Protein, and Fat

4. STARCH TEST RESULTS
Observation: The sample maintained its normal state when
iodine was poured over it, therefore not containing any starch.
Procedure: In order to test foods for starch, you will first need the article of food you
would like to test, as well as a supply of iodine. You will then have to fill an eyedropper with
the iodine, and with the food on some sort of plate or tray, drop a few drops on it. Make
sure to not under-do or overdo the iodine, because this can heavily affect your results. If the
sample turns black, that is a sign of starch in whatever food you chose to examine.
Comparing the results from my experiment and
research... I found that both sources tell us that
apples have almost no protein at all.
The apple did not turn black therefore...
Present or Not Present: Not Present
Image Credit: http://
www.jcrows.com/
Iodine iodine_1oz_lg.jpg

5. Image Credit: http://
upload.wikimedia.org/
wikipedia/commons/6/6a/
GLUCOSE TEST RESULTS
Sugar_cubes.jpg
Observation: I noticed a change of
color in the Benedict’s Solution as it
transformed somewhere in between
brick-red and yellow.
Comparing the results from my experiment and
research... I found that both sources tell us that
apple contain a lot of glucose.
The apple did turn brick-red and yellow therefore...
Present or Not Present: Present
Procedure: When testing foods for glucose, you will need a test tube, the article of food you wish to
test, and this time instead of iodine, a liquid called Benedict’s Solution will be used. What will be
done >irst in this process is the mixing of food and distilled water, which will be followed by
carefully pouring the product into an eyedropper. You will then add 40 drops of the mix into the
test tube that you prepared earlier. Finally, add 10 drops of Benedict’s Solution, and heat the test
tube that you prepared earlier to around 40‐50 degrees celcius. If you notice any change of color in
the liquid (green, yellow, or brick‐red), it is a sign of glucose in whatever food you are examining.

6. PROTEIN TEST RESULTS
Observation: I did not notice a change
of color in the Biuret Reagent.
Comparing the results from my experiment and
Biuret Reagent
research... I found that both sources tell us that
apples have almost no protein at all. Image Credit: http://
secure.sciencecomp
any.com/Assets/
images/nc2083n.jpg
The Biuret Reagent did not turn purple therefore...
Present or Not Present: Not Present
Procedure: The test that will show whether or not the food that we are examining contains
protein is called, the Biuret test. In order to preform this test, >irst you will need to add a
few drops of Biuret reagent to your sample. Then, put the test tube in hot water, and if you
notice a change in color (purple), protein is present in the sample that you are testing.

7. FAT TEST RESULTS
Observation: The piece of paper did not turn
translucent.
Image Credit: http://
www.longislandpress.com/
wp-content/uploads/
Comparing the results from my experiment and
2010/09/36GreenPage.jpg
research... I found that both sources tell us that
apples don’t contain fat.
The piece of paper did not turn translucent
therefore...
Present or Not Present: Not Present
Procedure: Smudge the sample on a piece of paper, and see if it
becomes translucent. If it does, it contains fat.

8. WHAT HAPPENS TO THE APPLE IN
EACH PART OF THE DIGESTIVE SYSTEM?
Mouth: Chews the apple into tiny pieces,
to make the work easier for the stomach.
Esophagus: The esophagus takes the
apple to the stomach.
Stomach: The apple is further broken down
by acids (chemical and enzymatic digestion),
slowing making its way into the small
intestine.
Small Intestine: All of the apple’s
nutrients are extracted before
Image Credit: http://brookingsapbiology.wikispaces.com/file/view/
human_digestive_system.jpg/212015132/
releasing them into the veins.
human_digestive_system.jpg
Liver: The liver removes toxins from the apple and
Rectum: The waste is stored in the produces bile.
rectum until it is time to get rid of it. Pancreas: The pancreas makes and delivers digestive juices.
Anus: The anus is where the waste Large Intestine: The parts of the food that are
leaves your body/digestive system. impossible to digest are moved along the large
intestine, which sends it to the rectum.

9. WHAT ENZYMES ACT ON THE
FOOD, WHAT DO THEY DO TO
THE FOOD AND WHY?
Apple
Image Credit: http://
www.thefatlossauthority.
com/fat_loss_tips/wp-
content/uploads/
2011/02/calories-in-an-
apple.jpg
Enzymes (such as enzymes in the stomach, and small intestine)
speed up the process of breaking down food. Without
enzymes, this task would take a very long time.

10. WHERE THE FOOD GETS ABSORBED
INTO THE BLOOD STREAM
Small Intestine
Image Credit: http://
www.daviddarling.info/images/
small_intestine.jpg
Small Intestine: All of the apple’s nutrients are
extracted before releasing them into the veins.

11. WHICH PARTS OF YOUR BODY
WILL USE THE FOOD AND WHAT
FOR?
Apple
Nutrient: Glucose
Image Credit: http://
www.thefatlossauthority.com/
fat_loss_tips/wp-content/
uploads/2011/02/calories-in-an-
apple.jpg
Blood - The apple’s nutrients are released into the bloodstream,
where they will be moved throughout the body. This is done in
order to maintain a healthy body.
Out the anus - Some of the food is turned into waste, where it
leaves the digestive system/body through the rectum, out the anus.

12. THANK YOU
FOR
Image Credit: http://
media02.hongkiat.com/
wallpaper/apple/Blue-
Aqua-Apple.png
Image Credit: http://
healthylifecarenews.co
m/wp-content/uploads/
2011/05/apple.jpg
WATCHING!