Prokaryotic and Eukaryotic Organisms

These diagrams demonstrate how cells can be differentiated by their...

• modes of locomotion
• means of replication
• sizes and densities 
• cell structures

How does the size of a eukaryotic organism normally compare to the size of a prokaryotic organism?

• eukaryotes are normally much smaller than prokaryotes
• eukaryotes and prokaryotes are both normally very small organims
• eukaryotes and prokaryotes are both very large organisms
• eukaryotes are much larger than prokaryotes

The life forms exhibiting the simplest cellular structure are_____.

• organelles
• proteins
• prokaryotes
• eukaryotes

Which of the following is true about cells?

• neither prokaryotes nor eukaryotes ever contain both a true nucleus that is well-defined and organelles that are separated from the cytoplasm by membranes
• Generally, prokaryotes do not have a true nucleus or membrane-bound organelles and eukaryotes contain both a nucleus and membrane-bound organelles
• Both eukaryotes and prokaryotes contain a true nucleus that is well-defined and organelles that are membrane-bound 
• Generally, eukaryotes do not have a true nucleus or membrane-bound organelles and prokaryotes contain both a nucleus and membrane-bound organelles. 

John is examining cells under the microscope. She is using the 40x objective lens to view the slide with a 10x eyepiece.  What is the total magnification she is using to view the cells?

• 10x
• 40x
• 100x
• 400x

Sometimes samples can be placed directly under a microscope. At other times, it is necessary to add water to the slide and make a wet mount.
For a wet mount, the steps are shown below.  In what order should these steps be followed?
1. If necessary, remove excess water by holding a paper towel next to coverslip.
2. Use eyedropper to place a drop of water on the sample.
3. Place a sample on the slide.
4. Place a coverslip on the slide.

• 2-3-1-4
• 1-2-3-4
• 4-3-2-1
• 3-2-4-1

Many protozoa have tiny hair-like structures that beat back and forth to aid a protozoan's movement.  What are these hair-like structures called?

• pseudopods
• cilia
• flagella
• hydrophilic hairs

Some prokaryotes and eukaryotes have a cellular structure called a flagella.  What is the purpose of the flagella?

• to transport molecules across the cell membrane
• to propel the cell through liquid
• to collect food for the cell
• to tell the cell the direction of a food source

What cell part does an amoeba use for locomotion and for capturing prey?

• pseudopod
• endoplasm
• vacuole
• lysosome

A bacterial cell is in a solution with a chemical gradient. The bacterial cell directs its movements in order to move toward the highest concentration of glucose molecules within the solution.  This is an example of positive _________.

• hydrotropism
• homeostasis
• chemotaxis
• phototaxis