Biology cumulative exam #5
Questions and answers with
Diagrams. GRADED A+
A
VI
2024!!
TU
IS
What color do you obtain when iodine is added to starch? ANSWER - Dark
M
purple to black
Amylase. ANSWER - starch
O
Bromelain. ANSWER - collagen (protein)
A
lipase
N
triglycerides (lipids)
JP
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?
Iodine, amylase, starch
, 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?
Iodine, amylase, starch, disaccharide (simple sugar)
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
A
this tube?
Iodine, amylase, disaccharide (simple sugar)
VI
What happened to bromelain in the canned pineapple?
TU
It was still present but inactive (denaturation by high heat)
In the "milk experiment", why were the tubes placed at 37 degrees Celcius?
IS
It is the optimal temperature of the enzyme
M
In the "milk experiment", you used a pH indicator. Why did the tube containing
the enzymes change color at the end of the experiment?
O
The enzymes broke down lipids into glycerol and fatty acids, which made the
solution more acidic
A
What usually denatures enzymes? Select all that applies
N
- Very low pH
- Human body temperature
JP
What colored light do photosynthetic plants absorb during photosynthesis?
All the colors but green
Does the amount of light affect the rate of photosynthesis?
yes
Questions and answers with
Diagrams. GRADED A+
A
VI
2024!!
TU
IS
What color do you obtain when iodine is added to starch? ANSWER - Dark
M
purple to black
Amylase. ANSWER - starch
O
Bromelain. ANSWER - collagen (protein)
A
lipase
N
triglycerides (lipids)
JP
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?
Iodine, amylase, starch
, 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?
Iodine, amylase, starch, disaccharide (simple sugar)
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
A
this tube?
Iodine, amylase, disaccharide (simple sugar)
VI
What happened to bromelain in the canned pineapple?
TU
It was still present but inactive (denaturation by high heat)
In the "milk experiment", why were the tubes placed at 37 degrees Celcius?
IS
It is the optimal temperature of the enzyme
M
In the "milk experiment", you used a pH indicator. Why did the tube containing
the enzymes change color at the end of the experiment?
O
The enzymes broke down lipids into glycerol and fatty acids, which made the
solution more acidic
A
What usually denatures enzymes? Select all that applies
N
- Very low pH
- Human body temperature
JP
What colored light do photosynthetic plants absorb during photosynthesis?
All the colors but green
Does the amount of light affect the rate of photosynthesis?
yes
