
The image shows that the cell membrane consists of a double layer of lipid molecules. Its primary role is to regulate the movement of substances into and out of the cell, helping the cell maintain a stable internal environment.
Which biomolecule makes up the majority of the cell membrane?
Disinfectants are chemicals used to kill harmful microorganisms on surfaces. Some disinfectants work by breaking down the cell membrane of bacteria.

What effect would destroying the cell membrane of a bacterium have?
The organelle that produces energy for the cell () was once a cell that was engulfed by a eukaryotic cell. This theory is called the .
Observe the structures in the diagram below.
This diagram best supports which statement?
Some students used information they gathered from lab investigations to prepare a table. They entered the table in their lab notebooks.
Which of these correctly identifies the two cells described in the table above?
Using the structures shown in the table, identify the four pathogens being described.
(Make sure to scroll over to get to the Virus option)
Prokaryote | Eukaryote Animal | Eukaryote Plant | Virus | |
|---|---|---|---|---|
Cell Membrane | ||||
Mitochondria | ||||
Cell Wall | ||||
DNA | ||||
Chloroplast | ||||
Nucleus |
Water is the most abundant molecule inside of a cell, however too much water entering a cell can cause the cell to burst (pop).
Which cell organelle is responsible for maintaining homeostasis by controlling how molecules, such as water, enter and leave the cell?
The table below shows the characteristics of four cell samples.

Sample A is a because .
Sample C is a because .
Sample D is a because .
The Venn diagram below shows similarities and differences between viruses and cells. Which features go in each section?
A researcher is comparing the DNA in prokaryotic and eukaryotic cells. Which statement accurately describes the difference?
Using four microscopes, scientists observe and document cell characteristics in a table. From the observations, identify the type of cell shown on each slide
Steven finished with his Tiger Tutorials and heads to the cafeteria for his lunch. Once he eats, his body will digest his quick carbohydrates!
Which organelle will help Steven produce energy?
A prokaryotic and a eukaryotic cell are shown below.

One similarity between a prokaryote and a eukaryote is , and one difference between a prokaryote and eukaryote is .
Two students were observing an organism under a microscope and he noticed that it had the following characteristics:
Cytoplasm
DNA protected by a nucleus
Ribosomes
Cell Wall
Large Central Vacuole
Mitochondria
Student A claims that the organism is a plant cell, and Student B claims that the organism is an animal cell.
Which student is correct AND why? (2 points)
Think about this information carefully, and enter your response in the space provided below.
Below is a picture of SARS-CoV-2, the virus that causes COVID-19.

Match each structure to its name.
| Draggable item | arrow_right_alt | Corresponding Item |
|---|---|---|
Genetic Material (DNA/RNA) | arrow_right_alt | Structure A |
Protein Capsid | arrow_right_alt | Structure B |
Glycoprotein Markers | arrow_right_alt | Structure C |
Below is a picture of SARS-CoV-2, the virus that causes COVID-19.

Match each structure with its function (job).
| Draggable item | arrow_right_alt | Corresponding Item |
|---|---|---|
Protects the genetic material | arrow_right_alt | Structure A |
Attachment and entry into host cell | arrow_right_alt | Structure B |
Information for making viral proteins | arrow_right_alt | Structure C |
One thing bacteria and viruses both have in common is .
The difference between viruses and bacteria cells is that a virus while a bacteria .
Three patients with different illnesses went to the doctor. Each patient gave a sample of their saliva, which was then tested. The results are shown in the table below.

Sample 1 contains a pathogen that is .
Sample 2 contains a pathogen that is .
Sample 3 contains a pathogen that is .
Viruses can be transmitted through air, water, food, insect bites, and direct skin contact. Once a virus gains entry to the body, it invades a in order to .
Avian influenza is a highly infectious virus that affects birds. Between April and July of 2024, the United States Department of Agriculture (USDA) and the Food and Drug Administration (FDA) reported a total of 18.37 million bird deaths and 0 human deaths.
Which of the following best explains why avian influenza affects birds but not humans?
Pathogens such as bacteria and viruses have extensions as shown in the diagrams below.
In bacterial cells, these extensions are used for motion. What are the extensions from a pathogenic virus used for?
A typical virus consists of glycoproteins on the outside (keys) that match receptor proteins (locks) on host cells.
The role of these glycoproteins is to…
In order to spread, Tobacco Mosaic Virus (TMV) must infect healthy plant cells. Which statement below is true?
What does a virus need from the host cell in order to reproduce?
Select TWO correct answers.
Which of the following best describes what happens once a virus enters the host cell?
Which statement is true of both viruses and cells?
A student is making a Venn diagram comparing eukaryotic cells, prokaryotic cells, and viruses
What will be in the middle of the venn diagram?
Viruses have a capsid ("protein shell") which protects the . This is similar to the of a eukaryotic cell.
Four students responded to a question regarding characteristics of viruses. Their responses were recorded in the table below.

Based on their responses, which student correctly describes the characteristics of viruses?
Which of the following best explains why plants can be affected by TMV while humans are unaffected?