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Enzyme Labs
Questions about the Enzyme labs we did in Honors Biology
24
Biology
9th Grade
11/13/2011

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Cards

Term
What is the relationship between enzymes and energy?
Definition
Enzymes help substrates form or break bonds and allows reactions to happen with less activation energy.
Term
Why don't enzymes work the same at different temperatures?
Definition
They get denatured at high temperatures, and slow down at low temperatures.
Term
How do vitamins help enzymes?
Definition
They help speed up enzymes by bonding with the substrate
Term
How does substrate concentration affect enzyme activity?
Definition
The higher the substrate concentration, the faster the enzyme will work, up to a point.
Term
What was the enzyme in the toothpick lab?
Definition
hands
Term
What was the objective of the toothpick lab?
Definition
to affect the rate that toothpickase works
Term
What did the coenzyme in the toothpick lab do?
Definition
hand over toothpicks to the enzyme
Term
What reaction is toothpickase catalyzing?
Definition
the breaking of the toothpicks
Term
In the enzyme lab, what was the negative control?
Definition
The test tube with water, starch, and iodine
Term
In which 3 temperatures did the color change?
Definition
22 degrees C, 37 degrees C, 60 degrees C
Term
What was the independent variable in the enzyme lab?
Definition
the temperature
Term
What was the dependent variable in the enzyme lab?
Definition
the amount of amylase activity, shown by color
Term
In which temperature did amylase work best?
Definition
37 degrees C
Term
In which range of temperatures did amylase function slowly?
Definition
10-22 degrees C, 60-80 degrees C
Term
In which range of temperatures did amylase not function?
Definition
less than 5 degrees C and greater than 80 degrees C
Term
What causes proteins to be denatured?
Definition
When they are exposed to high temperatures or extreme pH
Term
Why was the marble at the bottom in the second beaker of gelatin which contained Bromelain?
Definition
The proteins were broken down into animo acids.
Term
What color does Lugol's reagen turn in the presence of starch?
Definition
blue-black
Term
What color is Lugol's reagent without starch?
Definition
yellow-brown
Term
What color will Lugol's reagent turn when mixed with gelatin?
Definition
blue
Term
What color will Lugol's reagent turn when mixed with gelatin and protease?
Definition
pink
Term
In humans, how will enzymes be affected by a fever?
Definition
they will be less effective because a fever makes the body warmer than 37 degrees celsius.
Term
Why do organisms lower their body temperature when they hibernate?
Definition
It slows down the enzymes in their bodies so then can survive for longer on less food.
Term
Which type of graph is best for showing data gathered in the enzyme labs?
Definition
Line graph
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