Bio 1010 - General Biology » Fall 2022 » Lab 7 Quiz
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Question #1
A student had chocolate milk shake & fries. 1 g carbohydrate contains 4 kcal, 1 g protein contains 4 kcal, and 1 g fat contains 9 kcal. How many kcal will be produced by carbohydrate in milk shake?
A.
196 kcal
B.
322 kcal
C.
40 kcal
D.
441 kcal
E.
36 kcal
Question #2
You add Biuret solution to your morning orange juice. The Biuret solution does not change color. What can you conclude from this experiment?
A.
No proteins
B.
No sugars
C.
Sugars present
D.
Proteins present
E.
No starch
Question #3
Sudan IV tests for the presence of ____________________.
A.
oil
B.
proteins
C.
sugars
D.
starch
Question #4
Biuret reagent tests for the presence of _____________________.
A.
starch
B.
proteins
C.
salts
D.
sugars
Question #5
A student had chocolate milk shake & fries. 1 g carbohydrate contains 4 kcal, 1 g protein contains 4 kcal, and 1 g fat contains 9 kcal. What is the approximate percentage of total kcal that is produced by fries?
A.
27%
B.
46%
C.
23%
D.
54%
Question #6
Benedict's reagent tests for the presence of _______________.
A.
salts
B.
starch
C.
proteins
D.
sugars
Question #7
The arrow in the picture below is pointing to _______________________.
A.
roots
B.
stem
C.
leaves
D.
stored food supply
Question #8
What do you think will happen if you placed a drop of iodine on your baked potato at dinner?
A.
It will be stained blue
B.
It will be stained black
C.
It will be stained red
D.
It will be stained purple
E.
It will be stained yellow
Question #9
You want to test sunflower seeds have high oil content to produce cooking oil. Which chemical reagent would you use?
A.
Biuret
B.
Benedict's
C.
Iodine
D.
Silver nitrate
E.
Sudan IV
Question #10
Starch is a _________________.
A.
lipid
B.
carbohydrate
C.
protein
D.
nucleic acid
Question #11
The arrow is point to _____________________.
A.
roots
B.
stem
C.
stored food supply
D.
leaves
Question #12
In order to color change, which testing reagent requires heating?
A.
Iodine
B.
Silver nitrate
C.
Biuret
D.
Benedict's test
Question #13
A solution that contain unknown substances was tested with Benedict's test and showed red color change at the end. What can you conclude?
A.
Sugars are present
B.
Proteins are present
C.
Starch is present
D.
Sugars are absent
E.
Proteins are absent
Question #14
Macromolecules include all of these below include ___________________.
A.
minerals
B.
proteins
C.
lipids
D.
carbohydrates
Question #15
A student had chocolate milk shake & fries. 1 g carbohydrate contains 4 kcal, 1 g protein contains 4 kcal, and 1 g fat contains 9 kcal. How many kcal will be produced by proteins in fries?
A.
45 kcal
B.
372 kcal
C.
172 kcal
D.
20 kcal
E.
180 kcal
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