BIOLOGY CUMULATIVE STUDY GUIDE QUESTIONS AND ANSWERS (with diagrams) A+ GRADED.

1. What color do you obtain when iodine
is added to starch?
Dark purple to black
2. amylase starch
3. bromelain collagen (protein)
4. lipase triglycerides (lipids)
5. In the "amylase experiment", tube #1
shows what is at the beginning of
the chemical reaction. When iodine is
added, the color is dark blue. What is
present in this tube?
6. In the "amylase experiment", tube
#2 shows what is happening midway
through the chemical reaction. When
iodine is added, the color is gray-pink
ish. What is present in this tube?
7. In the "amylase experiment", tube #3
shows what is happening at the end
of the chemical reaction.When iodine
is added, the color is yellow. What is
present in this tube?
8. What happened to bromelain in the
canned pineapple?
Iodine, amylase, starch
Iodine, amylase, starch, disaccharide (simple sugar)
Iodine, amylase, disaccharide (simple sugar)
It was still present but inactive (denaturation by high heat)
9. In the "milk experiment", why were the It is the optimal temperature of the
tubes placed at 37 degrees Celcius?
10. In the "milk experiment", you used a
pH indicator. Why did the tube containing the enzymes change color at
the end of the experiment?
11. What usually denatures enzymes?
Select all that applies
enzyme
The enzymes broke down lipids into
glycerol and fatty acids, which made
the solution more acidic
- Very low pH
- Human body temperature