Labs 1 - 3

Question 1

What does Benedict test for?

Answer 1

simple sugars

Question 2

What does Sudan IV test for?

Answer 2

lipids

Question 3

What does Biuret test for?

Answer 3

protein

Question 4

What does Iodine test for?

Answer 4

starch / complex sugars

Question 5

What is the negative and positive result for Benedict?

Answer 5

Negative: does not change
Positive: green to red

Question 6

What is the negative and positive result for Sudan IV?

Answer 6

Negative: red
Positive: dark red

Question 7

What is the negative and positive result for Iodine?

Answer 7

Negative: reddish orange
Positive: deep blue or black

Question 8

What is the negative and positive result for Biuret?

Answer 8

Negative: light blue
Positive: lavender

Question 9

What was the independent, dependent, and control variable of Lab #3, Chemical Food Analysis?

Answer 9

Independent: Types of substances used
Dependent: Results of reagents with substances
Control: Amount of reagents used

Question 10

What was the independent, dependent, and control variable of Lab #2, Stickleback Fish Phenotypes?

Answer 10

Independent: Lakes
Dependent: Pelvic spike morphology
Control: Species of fish