Theory Vs Law
Microscopes
Cell Membrane
Cell Structure and Function
Solutions
100
Scientific Theories and scientific laws can change with evidence?
True or False
False
100
The Cell Theory is a unifying principal of biology. Which invention
from the 17th century allowed for the development of the modern
Cell Theory?
A. X-rays
B. Computers
C. The light microscope
D. The scanning electron microscope
C. The light microscope
100
Most of the cell membrane is made of which macromolecule?
Lipid
100
A fossilized cell is discovered; evidence suggests it reproduced
on its own. The cell had DNA, but a membrane did not
enclose its DNA. Which type of organism would this most
likely be?
Prokaryote
100
The cell membrane of a red blood cell will allow water, oxygen, and carbon dioxide to pass through. Because other substances are blocked from entering, this membrane is called
Selectively Permeable
200
At one time, many people thought diseases were caused by fate or by
incorrect behavior. Following the invention of the microscope, bacteria
were discovered. After this, a new theory of what causes disease arose that
was known as The Germ Theory. Why was the original theory modified?
A. It quickly became obvious that germs cause disease.
B. The person who invented the microscope became ill.
C. New evidence prompted revision to the original ideas.
D. The proponents of the germ theory had political powe
C. New evidence prompted revision to the original ideas
200
Microscopes are often used to view very small structures
or organisms. Which type of microscope would be most
useful in examining the details of the external structures of
bacterial cells?
A. Dissecting microscope
B. Compound light microscope
C. Scanning electron microscope
D. Transmission electron microscope
D. Transmission electron microscope
200
Describe Osmosis
Water diffusing across the cell membrane until equilibrium is reached
200
What membrane-bound organelle is present in prokaryotes? What is its function?
Ribosomes- produce/build proteins
200
A single-celled paramecium is an animal-like organism that lives in ponds where water constantly enters its cell. It uses a specialized vacuole to PUMP some of the water back into the pond against the concentration gradient. Which type of transport does the paramecium use to PUMP extra water out (so it doesn’t blow up)?
Active transport
300
Which statement was NOT included in The Cell Theory?
A. All living things are composed of cells
b. Living cells come from only from other living cells
C. Cells can spawn from spontaneous generation
D. Cells are the smallest unit of life
C. Cells can spawn from spontaneous generation
300
This image shows the detailed inner structure of an individual organelle called a mitochondria, which is located inside asingle cell. Which microscope most likely took this image?
A.Compound Light
B.Scanning Electron
C.Transmission Electron
D.Dissecting
C. Transmission Electron
300
The picture shows a contractile vacuole in a unicellular freshwater organism. The contractile vacuole regulates the flow of water into and out of the cell in an aquatic environment. What conditions cause the contractile vacuole to fill with water?
A. The concentration of water is greater outside the cell than inside the cell.B. The concentration of water inside the cell is greater than outside the cell.
C. The temperature of water in the vacuole is higher than the temperature of its environment.
D. The temperature of water in the vacuole is lower than the temperature of its environment.
B. The concentration of water inside the cell is greater than outside the cell.
300
Cells may have different shapes and different amounts of
organelles, depending on their function. What are features that
plant cells have that animal cells lack?
Chloroplasts, Central Vacuole, Cell Wall
300
Why is it important for a cell to have a larger surface are to volume ration that a smaller surface are to volume ratio, aka Small cell vs large cell?
Small cells are more efficient in transporting materials across the cell allowing the cell to gain all necessary nutrients vs a larger cell is less efficient due to size and will not receive its nutrients causing cell death.
400
Biology student created the image below to show different stages
in a cell cycle of a bacteria. This model shows Virchow’s contribution to the Cell Theory. What part of the Cell Theory does it represent?
A. All living things are made of cells
B. All cells come from preexisting cells
C. Cells form through spontaneous generation
D. Cells are the basic structural and functional units of life
B. All cells come from preexisting cells
400
Microscopes are used to increase the view of a particular specimen. What type of microscope would be used to view a specimen that is approximately 0.3 millimeters?
Compound Light Microscope
400
Which way will the molecules begin moving AND what type of transport is being shown in the diagram?
High to low concentration
Passive transport
400
Cells can have two kinds of endoplasmic reticulum (ER): smooth ER,
which has no ribosomes; and rough ER, which has ribosomes
embedded in its membrane. What would happen if the rough
endoplasmic reticulum in the cell of an organism lost all of its
ribosomes?
Protein production would significantly decrease
400
Intravenous saline injections are often given as a treatment for
severe dehydration. The concentration of saline (0.9% NaCl) in
these injections is the same as the concentration in human cells.
What would happen if pure water was introduced into the body
instead of saline?
A.The cells would gain water and swell.
B.The cells would lose water and shrivel.
C.The cells would become impermeable to sodium (Na+) ions.
D.The cells would become impermeable to chlorine (Cl–) ions.
A.The cells would gain water and swell.
500
The cell theory states that cells are the basic unit of life. Which of the following are composed of the same components in all living organisms?
A. Mitochondria
B. Nucleic Acid
C. Nucleus
D.Vacuoles
B. Nucleic Acid
500
Name all 4 microscopes in order from highest magnification to lowest?
TEM, SEM, Compound, Dissecting
500
The diagram shows the transport of materials into a cell with the help of a protein channel. If the movement does NOT require energy, what type of transport is it?
Diffusion, specifically, Facilitated Diffusion in the picture
500
What is the purpose of folded or stacked membranes inside of certain organelles? What are 4 organelles that have the folded or stacked membranes
To increase surface area which leads to increased efficiency and more products being made.
Mitochondria, Golgi apparatus (body), Chloroplasts, Endoplasmic Reticulum (smooth and rough ER)
500
A student filled six test tubes with saltwater solutions of differing concentrations. The student recorded the starting masses of six potato slices before placing each of them in a different test tube. The student recorded the final masses of the potato slices after 30 minutes. The results are shown in the data table. What type of solution is the potato slice in test tube 4 in? Will the water move in or out of the potato slice
Hypertonic, water will move out of the slice