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WorksheetsCells and the Plasma Membrane
Total questions: 56
Worksheet time: 32mins
What are the smallest living functional units in biology?
Tissues
Organs
Cells
Molecules
How many different types of cells are there?
Over 100
Over 200
Over 250
Over 300
What is one of the characteristics of the different types of cells?
They are all identical in structure and function
They are specialized in structure and function
They are not specialized in structure and function
They do not have any specific structure or function
From where do cells arise?
From non-living matter
From existing cells
From chemical reactions
From spontaneous generation
What does the plasma membrane separate?
Intracellular fluid (ICF) from extracellular fluid (ECF)
Cytoplasm from nucleus
Mitochondria from cytoplasm
Ribosomes from endoplasmic reticulum
Which of the following is NOT a component of the plasma membrane?
Membrane lipids
Membrane proteins
Surface sugars
Nucleic acids
What forms the glycocalyx on the plasma membrane?
Membrane lipids
Membrane proteins
Surface sugars
Cholesterol
Which of the following is a type of protein found in the plasma membrane?
Integral membrane protein
Peripheral membrane protein
Channel protein
All of the above
What percentage of the lipid bilayer is made up of phospholipids?
50%
75%
25%
100%
Which part of the phospholipid is hydrophilic?
Fatty acid tails
Glycerol
Phosphate heads
Cholesterol
Which part of the phospholipid is hydrophobic?
Phosphate heads
Glycerol
Fatty acid tails
Cholesterol
What other component, besides phospholipids, is mentioned as part of the lipid bilayer?
Proteins
Carbohydrates
Cholesterol
Nucleic acids
What is the process called that uses a concentration gradient to move small, lipid-soluble substances through phospholipids?
Active transport
Facilitated diffusion
Simple diffusion
Osmosis
Which of the following is an example of a substance that can pass through the phospholipid bilayer by simple diffusion?
Large proteins
Small, uncharged molecules
Ions
Glucose
Which of the following is NOT a function of integral proteins in the cell membrane?
Transport
Receptors
Enzymes
Cell adhesion
What is the primary role of peripheral proteins in the cell membrane?
Transport
Receptors
Enzymes
Cell junctions
Which type of protein is involved in cell adhesion and anchoring the cytoskeleton?
Integral proteins
Peripheral proteins
Glycoproteins
Channel proteins
What is the function of glycoproteins in the cell membrane?
Transport
Receptors
Enzymes
Carbohydrate attachment
Which of the following is a component of the cell membrane that contains carbohydrates attached to lipids?
Glycoprotein
Glycolipid
Phospholipid bilayer
Cholesterol
What is facilitated diffusion?
Movement of molecules against the concentration gradient
Movement of molecules using energy
Movement of molecules through integral proteins using the concentration gradient
Movement of molecules through the plasma membrane without any proteins
Which of the following is an example of a molecule that uses facilitated diffusion?
Small nonpolar molecules
Large ionic molecules
Water molecules
Oxygen molecules
What is osmosis?
Diffusion of water through a semipermeable membrane
Diffusion of solutes through a semipermeable membrane
Active transport of water through a semipermeable membrane
Active transport of solutes through a semipermeable membrane
When does osmosis occur?
When there is an imbalance of solutes inside a cell versus outside
When there is an equal concentration of solutes inside and outside a cell
When there is an imbalance of water inside a cell versus outside
When there is an equal concentration of water inside and outside a cell
What type of membrane is involved in osmosis?
Permeable membrane
Semipermeable membrane
Impermeable membrane
Non-permeable membrane
What is the effect of a hypertonic solution on red blood cells?
Red blood cells swell and burst.
Red blood cells remain the same size.
Red blood cells shrink and become crenated.
Red blood cells divide.
In which type of solution do red blood cells maintain their normal shape?
Hypertonic
Isotonic
Hypotonic
Supersonic
What happens to red blood cells in a hypotonic solution?
They shrink and become crenated.
They remain the same size.
They swell and may burst.
They divide.
What is required for active transport to occur?
Oxygen
Glucose
ATP
Carbon dioxide
Active transport often works in which direction relative to the concentration gradient?
With the concentration gradient
Against the concentration gradient
Along the concentration gradient
Perpendicular to the concentration gradient
Which of the following is an example of active transport?
Diffusion
Osmosis
Na+/K+ pump
Facilitated diffusion
What ions are involved in the Na+/K+ pump?
(a)
Which process involves the movement of substances out of a cell using vesicles?
Endocytosis
Exocytosis
Phagocytosis
Pinocytosis
Which process involves the movement of substances into a cell using vesicles?
Endocytosis
Exocytosis
Phagocytosis
Pinocytosis
What is the term used to describe the "sugar coating" on every cell type?
Glycocalyx
Glycolipid
Glycoprotein
Phospholipid
Which of the following is a function of the glycocalyx?
Energy production
Cell-to-cell recognition
Protein synthesis
DNA replication
How does the glycocalyx help the immune system?
It produces antibodies
It allows the immune system to recognize "self" vs. "nonself"
It destroys pathogens
It transports nutrients
What is the structure of a tight junction?
Integral proteins on adjacent cells fuse
Integral proteins on adjacent cells separate
Peripheral proteins on adjacent cells fuse
Peripheral proteins on adjacent cells separate
What are the structural components of a desmosome?
Plaques with linker proteins and supported by intermediate filaments
Tight junctions and supported by actin filaments
Gap junctions and supported by microtubules
Adherens junctions and supported by collagen fibers
Which type of glycoprotein is found in desmosomes?
Integrin
Cadherin
Selectin
Fibronectin
What type of filament supports desmosomes?
Actin filaments
Microtubules
Intermediate filaments
Collagen fibers
Identify the structure labeled as "Plaque" in the diagram of a desmosome.
A structure that connects adjacent plasma membranes
A structure that supports intermediate filaments
A structure that contains transmembrane glycoproteins
A structure that forms the intercellular space
What is the primary structure of gap junctions?
They form tight seals between cells.
They form tunnels that allow small molecules to pass from cell to cell.
They anchor cells to the extracellular matrix.
They provide structural support to the cell membrane.
Which of the following is NOT a component of gap junctions?
Connexons
Adjacent plasma membranes
Gap between cells
Desmosomes
What is the function of gap junctions?
To provide structural support to the cell
To allow small molecules to pass from cell to cell
To anchor cells to the extracellular matrix
To form tight seals between cells
Where are gap junctions located?
Between adjacent plasma membranes
In the extracellular matrix
Within the cell nucleus
On the cell surface
Please label the cell pictured.
nucleus
cell membrane
organelles
Match the following parts of the plasma membrane to their pictures:
Phospholipids
Cholesterol
Carbohydrates
Proteins
The phospholipids that form the bilayer of the plasma membrane have polar and nonpolar regions. What is the nonpolar portion of the phospholipid made of?
monosaccharides
nucleic acids
fatty acids
amino acids
Why is the plasma membrane called a "fluid mosaic model"?
The function of the plasma membrane is....
to regulate what enters and leaves the cell.
fight bacteria and viruses that enter the cell.
provide rigid support and protection to the cell.
make sure each cell can move
Which of the following describes the orientation of the plasma membrane?
Hydrophobic heads face the exterior and interior of the cell, while hydrophilic tails make up the interior of the membrane
Hydrophilic heads face the exterior and interior of the cell, while hydrophobic tails make up the interior of the membrane
Hydrophobic heads face the exterior of the cell and hydrophilic tails face the interior of the cell
Hydrophilic heads face the exterior of the cell and hydrophobic tails face the interior of the cell
Match the following functions to the parts of the cell membrane:
Forms a bilayer
Phospholipids
Used in cell signaling
Carbohydrate chains
Transport molecules through
Proteins
Strengthens the membrane
Cholesterol
Which of the following maintains the fluidity of the plasma membrane?
Cholesterol
Carrier Protein
Fatty Acid Tails
Glycolipids
Which of the following parts of the plasma membrane is important for strengthening the membrane and stopping the phospholipid tails from sticking together?
proteins
hydrophillic heads
cholesterol
carbohydrate chains
Drag and label the parts of the phospholipid bilayer.
hydrophilic
hydrophobic
The fluid mosaic model describes the plasma membrane as consisting of a (a) bilayer with embedded (b) .
