WorksheetsUnit 3: Cell Transport & Cellular Processes
Total questions: 28
Worksheet time: 50mins
How does the cell membrane in the diagram above help to maintain the health of this cell?
By providing support and structure for the cell
By regulating the transport of materials in and out of the cell
By manufactruing protein to provide energy for the cell
By storing food as future energy for the cell
Which of the following best explains the process illustrated in the above diagram?
Passage of water molecules through a semi-permeable membrane to equalize concentration
Transport of molecules across a membrane from a high to low concentration gradient by means of a carrier molecule
Movembent of molecules against a concentration gradient expending energy
Separation of suspended particles from a fluid environment through a porous membrane
which of the following describes a form of active transport?
Oxygen transfers into red blood cells through small gaps in the cell membrane from oxygen-rich environment surround the cells
Large molecules are brought into the cell by wrapping the cell membrane around the molecules to form a vesicle
water moves across the cell membrane from the side with high osmotic pressure towards the side with low osmotic pressure
membrane proteins provide a pathway for larger particles to move across the cell membrane and bring the cell and environment closer to equilibrium
Which of the following describes a form of passive transport?
Membrane proteins act as an enzyme to break down ATP and use the energy to move particles against the concentration gradient.
Large molecules are brought into the cell by wrapping the cell membrane around the molecules to form a vesicle.
Membrane proteins use the energy of the cell's resting potential to move particles against the concentration gradient.
Membrane proteins provide a pathway for larger particles to move across the cell membrane and bring the cell and environment closer to equilibrium.
Which of the following describes osmosis?
oxygen transfers into red blood cells through small gaps in the cell membrane from oxygen-rich environment surround the cells
Large molecules are brought into the cell by wrapping the cell membrane around the molecules to form a vesicle.
Water moves across the cell membrane from the side with high osmotic pressure towards the side with low osmotic pressure.
Membrane proteins provide a pathway for larger particles to move across the cell membrane and bring the cell and environment closer to equilibrium.
How do cells maintain homeostasis without using energy?
Membrane proteins breakdown moklecules to move other molecules from low concentration to high concentration
Membrane proteins use the negative charge inside of the cell to increase the concentration of a chemical inside of the cell
Maintaining osmotic balance by taking in or releasing water to match the water concentration of the extracellular environment
Form the cell membrane around food to create a vacuole that is kept separate from the rest of the cytoplasm while enzymes break down the food.
Due to environmental changes, the water concentration outside of a cell becomes lower than the water concentration inside of the cell. How would the cell most likely respond to maintain homeostasis?
The cell would fill with water
The cell would release water
The cell would increase the production of salt
The cell would decrease the production of salt.
How do cells use energy to maintain homeostasis
Membrane proteins allow chemicals to move from high concentrations to low concentration until equilibrium is reached.
Form a vacuole around cellular waste and fuse the vacuole with the cell membrane to release the waste into the extracellular environment
Breakdown sugar to synthesize adenosine triphosphate (ATP) from adenosine diphosphate (ADP) and phosphate
Maintaining osmotic balance by taking in water or releasing water to match the water concentration of the extracellular environment.
Dialysis tubing containing starch solution was placed in a beaker with water/iodine solution. After 10 minutes the water stayed red, but the starch inside the dialysis tube turned black.
If dialysis tubing representes a cell membrane in this demonstration, what process is being observed in the changing color of the starch solution?
Iodine cannot pass through a membrane.
A semipermeable membrane will diffuse selected molecules. (iodine and not starch)
A permeable membrane diffuses chemicals in and out of its surface.
Starch can be easily diffused through a membrane
A scientist is investigating cell transprort. She observes molecules being transported into a cell through proteins present in the cell membrane. These proteins do not use energy to transport the molecules.
Which of the following best explains the type of cell transport observed by the scientist?
Active transport because membrane proteins were used
Diffusion because the molecules were entering the cell.
Facilitated diffusion because the proteins were not using energy
Osmosis because the molecules were moving against the concentration gradient.
Although diffusion occurs naturally without action from a cell, diffusion benefits cells. How do cells benefit from difusion?
Cells increase concentration of certain molecules
Cells achieve balance with their environment
Cells decrease concentration of certain molecules
All of the above are correct.
Which process temporarily disrupts homeostasis because it increases an already high concentration of chemicals in the cell?
Padssive transport through osmosis
Active transport though exocytosis
Passive transport though membrane protiens
Active transport though membrane proteins.
What type of biomolecule is used during facilitated diffusion to allow large particles in or out of the cell?
Carbohydrates
Lipids
Proteins
Nucleic acids
What type of biomolecule is a major part of the cell membrane because it creates a thin hydrophobic layer that helps maintain selective permeability?
Carbohydrates
Lipids
Proteins
Nucleic acids
Active transport occurs through which type of biomolecule
Carbohydrates
Lipids
Proteins
Nucleic acids
What is the function of proteins in the cell membrane?
Facilitate the movement of particles across the cell membrane
Receive chemical signals from other cells to begin a process in the cell
Code for specific structures found in the cell membrane
Create a hydrophobic layer that forms a barrier between the inside and outside of the cell
Which of the following correctly pairs a biomolecule to its function?
Enzyme: makes cell membrane's phospholipid bilayer
Cellulose: makes the cell walls of all plant cells
Cholesterol: Stores genetic information
Glucose: Increase the rate of a reaction
When the process of mitosis is correctly completed, the daughter cells should contain exact copies of all of an organisms's genes. Which biomolecule contains all of an organism's genes?
Carbohydrate
Lipids
Proteins
Nucleic acids
Helicase is a protein that breaks the hydrogen bonds between complementarystrands of DNA to allow DNA replication occur. What type of biomolecule contains the code for making helicase?
Carbohydrate
Lipids
Protiens
Nucleic acids
Many plants have waxy coatings on some surfaces. This coating reduces water loss because it is not water permeable. This waxy coating is which of the following types of organic molecule?
carbohydrate
lipid
nucleic acid
protein
which of the following macromelecules are a prominent part of animal tissues that function in insulation, helping animals conserve heat?
carbohydrates
lipids
proteins
nucleic acids
Beeswax is a waxy substance that is produced by bees and then harvested by humans for a variety of uses. Ancient romans used beeswax as a waterproofing agent because it is not water permeable. Beeswax is which of the following types of organic molecule?
carbohydrate
lipid
nucleic acid
protein
Which of the following macromolecules are a prominent part of animal connective tissue such as cartilage and keratin?
Carbohydrates
lipids
proteins
nucleic acids
What monomer is represented by this diagram?
monosaccharide
nucleotide
glycerol
amino acid
some students used vinegar to dissolve away the shells of three eggs and used these eggs as models of human red blood cells. The students observed the changes in the eggs when they were placed in different solutions.
Which statement best describes the role of the cell membrane in this model?
The cell membrane is an impermeable barrier that prevents water from entering the cell.
The cell membrane allows solutes to enter the cell, which causes the cell to shrink
The cell membrane allows water to enter and leave the cell.
The cell membrane removes solutes from the environment.
The cellular process known as the sodium-potassium pump was discovered in the 1950s by Jens Christian Skou, a Danish scientist. This process is a form of active transport that moves three sodium ions to the outside of a cell for every two potassium ions that it moves into the cell. Which of these best explains why energy is needed for active transport?
Ions are negatively charged
Ions are attached to large proteins
Ions are trapped inside the plasma membrane
Ions are moved against the concentration gradient.
Which two processes does this diagram most directly model?
Energy conversions and synthesis of new molecules
Synthesis of ne molecules and homeostasis
Transport of molecules and energy conversions
Homeostasis and transport of molecules
The picture shows a contractile vacuole of 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?
The concentration of water is greater outside the cell than inside the cell
The temperature of water in the vacuole is higher than the temperature of its environment
The concentration of water inside the cell is the same as the concentration outside the cell
The temperature of water in the vacuole is lower than the temperature of its environment.
