Macromolecules
Enzymes
Water
pH
Variables
100
What macromolecule does this structure represent?
Nucleic acid
100
Why do our bodies need enzymes?
To break down the foods we eat.
100
What type of bond holds 2 water molecules together?
Hydrogen bond
100
What pH is neutral?
7.0
100
The variable that is manipulated or changed in an experiment is called...
Independent variable
200
What 2 things can cause enzymes to denature & change shape?
pH & temperature
200
What property of water that allows a light object walk on water because it does not break the polar bonds on the surface of water?
Surface Tension
200
A pH of 2 would be considered...
Strong Acid
200
The variable that is measured in an experiment is called...
Dependent Variable
300
Which macromolecule provides structural support & muscle building?
Proteins
300
How do enzymes speed up chemical reactions?
They lower the activation energy.
300
What property of water is demonstrated in the picture?
Capillary Action
300
A pH of 9 would be considered...
Weak Base
300
The group that does NOT get the experiment performed on it is called...
Control Group
400
Which 2 macromolecules are essential for storing and providing energy for animal cells?
Carbohydrates & Lipids
400
Which letter represents the product?
E
400
When water sticks to itself it is called...
Cohesion
400
What is pH a measure of?
The concentration of hydrogen (H+) ions in a solution.
400
A scientist studies how many days people can eat chicken noodle soup until they get sick. What is the DEPENDENT variable?
How long it takes to get sick.
500
Why is butter solid at room temperature?
It has saturated fats & single bonds.
500
Are enzymes used up in chemical reactions?
No-they are reusable.
500
This property is why water and oil DO NOT MIX.
Polarity:Water is polar and oil is non-polar
500
What does 1 H+ and 1 OH- ions produce?
Water= H2O
500
Where is the independent variable placed on a graph?
X axis