

U3.L5 Carbohydrates in the digestive system
Presentation
•
Science
•
7th Grade
•
Easy
Kristin Rowe
Used 6+ times
FREE Resource
21 Slides • 16 Questions
1
2
Multiple Choice
Ella wanted to test for the presence of starch in bread. What indicator should she use?
iodine
Benedicts
Biuret
Ethanol
3
4
Multiple Choice
Iodine was dropped on the apple shown in the picture. The results show that the apple contains starch.
TRUE
FALSE
5
Multiple Choice
Iodine was dropped on a potato. Based on the image, the potato contains starch.
TRUE
FALSE
6
Multiple Select
Five food samples were tested with Benedict's solution. Based on the picture, which ones contain sugars?
A
B
C
D
E
7
8
Labeling
At the end of our dialysis experiment, what food molecules did we find inside and outside of the dialysis tube?
sugar
starch
no food molecules
sugar and starch
9
10
Labeling
Label the parts of the model.
starch molecule
sugar molecule
starch and sugar solution
water
11
Dropdown
12
13
14
Open Ended
How does the structure of a complex carbohydrate molecule (starch) compare to a sugar molecule (glucose)? How does this relate to our experiment?
15
16
17
Open Ended
We’ve now seen that glucose goes through the walls of the small intestine, but starch does not. But starch also disappears from a healthy small intestine, so what happens to it???
18
19
20
21
22
Multiple Choice
Which carbohydrates begin to decrease first in a healthy digestive system?
sugar (glucose)
starch (complex carbohydrates)
Fiber
23
Dropdown
24
25
26
27
Multiple Choice
Look at the structures of the glucose and starch molecules. What could be happening to starch in the mouth that would explain why the amount of starch decreases while the amount of glucose increases?
The glucose molecules are combining to form starch.
The starch molecule is being broken apart into sugar molecules.
The starch is being absorbed into your teeth.
The starch turns into protein.
28
29
30
Dropdown
31
32
33
Open Ended
Fiber stays the same throughout the digestive system.
How could its structure explain this?
34
Multiple Choice
Based on the graphs, what food molecules should be found in a healthy person's poo?
sugar
starch
fiber
protein
35
36
Multiple Select
Based on the graphs, what food molecules should be found in a M'Kenna's poo?
sugar
starch
fiber
protein
37
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