Asking the Question Right
Molecules of Life
Reaction Time
Through the Looking Glass
The Power of Water
100
A proposed explanation made as a starting point for further investigation
What is an hypothesis?
100
A mixture of substances having a uniform composition.
What is a solution?
100
These molecules speed up the rate of chemical reactions.
What are enzymes?
100
This part of a microscope regulates how much light reaches the specimen.
What is the iris diaphragm?
100
A device used to measure liquid volumes greater than about 10 ml.
What is a graduated cylinder?
200
A factor in every experiment which the investigator purposely changes.
What is an independent variable?
200
A quality of certain molecules which prevents their crossing the cell membrane without a transporter.
What is polarity? or What is hydrophilic?
200
Oxidation of food molecules by cells to make ATP.
What is respiration?
200
Using a microscope, these are small green spheres can be seen inside plant cells.
What are chloroplasts?
200
Placing a cell in this kind of solution will cause water to move out of the cell.
What is hypertonic?
300
A pattern of variation of traits where the mean and the mode are the same.
What is a normal distribution?
300
The basic structure for this class of biomolecules.
What is amino acids?
300
This measures the amount of light absorbed by a solution.
What is a spectrophotometer?
300
Use this objective first when beginning a slide examination.
What is the 4x objective lens?
300
The force which determines the direction in which water will flow, governed by solute concentration and applied pressure.
What is water potential?
400
A dye that forms a pink or orange color when lipids are present.
What is Sudan IV?
400
Hydrophilic molecules do this in water.
What is dissolve?
400
Found in horseradish, it speeds up this reaction.
What is peroxidase?
400
The ability of a system of lenses to distinguish two points as being separate.
What is resolution?
400
This causes DNA to sink into a well of an agarose gel.
What is loading dye?
500
A molecule having both hydrophilic and hydrophobic regions.
What is amphipathic?
500
The cell structure in which non-polar molecules are located.
What is the cell membrane?
500
This happens when a pipette tip touches any surface, including skin.
What is contamination?
500
A structure found in both leaf cells and human cells, but not in bacteria.
What is a nucleus?
500
The four major classes of biological macromolecules.
What are lipids, proteins, nucleic acids, and carbohydrates?