WorksheetsOrganelles and cell transport
Total questions: 60
Worksheet time: 36mins
The movement of molecules from an area of high concentration to low concentration.
osmosis
diffusion
endocytosis
phagocytosis
A muscle cell that is particularly active would need a large number of __.
mitochondria
ribosomes
nuclei
chromosomes
Which of the following is a function of the plasma membrane?
breaks down lipids, carbohydrates, and proteins from food
stores water and salts
make ATP
regulate what enters and exits the cell
The thin structure that surrounds a cell is known as __.
a nucleus
a plasma membrane
cytoplasm
a vacuole
Which of the following stabilizes a membrane?
phospholipid
channel protein
carrier protein
cholesterol
If the concentration of oxygen IN a cell is 5% and OUTSIDE a cell is 10%, which way will oxygen diffuse?
into the cell
out of the cell
it won't diffuse
movement DOWN the gradient with the help of a channel protein
active transport
diffusion
facilitated diffusion
osmosis
Which cell will swell with water because it is in a hypotonic solution?
Water moving down its concentration gradient across a selectively permeable membrane
Iodine moving from an area of high concentration to low concentration
Water moving up its concentration gradient across a selectively permeable membrane.
All cells contain cytosol, ribosomes, ___________ and _____________.
(Pick 2)
chromosomes
cell walls
are bound by a plasma membrane
central vacuoles
What is the role of ribosomes?
To store genetic information.
To produce glycolipids.
To synthesize proteins.
To hydrolyze waste materials.
Which of the following is a difference between smooth and rough endoplasmic reticulum (ER)?
Smooth ER exists in a part of the cell near the cell membrane, while rough ER exists in a part of the cell near the nucleus.
Smooth ER is not studded by ribosomes, while rough ER is studded by ribosomes.
Smooth ER is meant to compartmentalize the cell, while rough ER detoxifies and synthesizes lipids.
Smooth ER is made without the additional help of proteins, whereas rough ER is made with the help of special proteins called reticuloproteins.
An organelle that transports and packages large molecules like complex carbohydrates, lipids and proteins.
Rough Endoplasmic Reticulum
Golgi Complex
Smooth Endoplasmic Reticulum
Vacuoles
In plants, what is the primary function of the central vacuole?
To maintain turgor pressure inside of the cell.
To remove waste from inside of the cell.
To store nutrients inside of the cell.
To synthesize new membranes for the cell.
Which of the following membrane-bound organelles is responsible for hydrolysis (using enzymes to break down macromolecules)?
Vacuoles
Chloroplasts
Lysosomes
Peroxisomes
Which of the following is a reason that cells are so small?
Cells are small because they want to maximize their surface area-to-volume ratio.
Cells are small because they want to maximize their volume-to-surface area ratio.
Cells are small because they need to produce extremely small macromolecules.
Cells are small because they prefer to work together in clusters of many thousands that wouldn't otherwise fit anywhere.
Which of the following is one way that cells and some organelles increase their surface area without increasing their size?
They will often include perfectly spherical membranes.
They will often include folds in their membranes.
They will often include holes in their membranes.
They will maximize their volume.
Which of the following correctly describes hydrophobic and hydrophilic regions of the plasma membrane?
The hydrophobic region is made of phosphates, and the hydrophilic region is made of lipids.
The hydrophobic region is 'water-loving', and the hydrophilic region is 'water-fearing'.
The hydrophobic region is polar, and the hydrophilic region is non-polar.
The hydrophobic region faces inward in the interior of the membrane, the hydrophilic region faces outwards towards the aqueous environment.
Which of the following is the correct name of the model that describes the structure of the cell membrane?
The Fluid Molecular Model
The Free Molecular Model
The Fluid Mosaic Model
The Free Mosaic Model
Which of the following is a difference between passive and active transport?
Passive transport moves molecules against their gradient, while active transport moves molecules with their gradient.
Passive transport moves molecules with a direct input of energy, while active transport moves molecules without a direct input of energy.
Passive transport moves molecules non-spontaneously, while active transport moves molecules spontaneously.
Passive transport moves molecules without a direct input of energy, while active transport moves molecules with a direct input of energy.
Which of the following describes a solution that has a higher concentration than the internal environment of the cell?
Hypotonic
Isotonic
Hypertonic
Transtonic
Which of the following describes the endosymbiotic theory?
A prokaryotic cell engulfed several other types of smaller prokaryotic cells, and eventually its compartmentalization made the cell eukaryotic.
A eukaryotic cell engulfed several other types of smaller prokaryotic cells, and eventually its compartmentalization made the cell prokaryotic.
A prokaryotic cell engulfed several other types of smaller eukaryotic cells, and eventually its compartmentalization made the cell eukaryotic.
A eukaryotic cell engulfed several other types of smaller eukaryotic cells, and eventually its compartmentalization made the cell prokaryotic.
The 3 types of passive transport are
diffusion
pumps
facilitated
cotransport
osmosis
The 3 types of active transport are
facilitated diffusion
endocytosis/exocytosis
pumps
osmosis
cotransport
Which of the following membrane-bound organelles evolved from free-living prokaryotic cells?
Nuclei and plasmids.
Mitochondria and chloroplasts.
Vacuoles and lysosomes.
Centrioles and microtubules.
In relatively warm temperatures, cholesterol makes the membrane _____________and in cold temperatures makes the membrane ___________________.
more fluid, less fluid
less fluid, more fluid
thinner, thicker
thicker, thinner
Integral proteins penetrate the ______________________ core of the lipid bilayer.
hydrophilic
protein
hydrophobic
all of the membrane
Membrane potential is
an equal concentration of ions across the membrane results in an electrochemical gradient
The number of phospholipids in one plasma membrane.
an unequal concentration of ions across the membrane results in an electrochemical gradient.
an equal concentration of carrier proteins across the membrane.
Peripheral proteins _________________embedded in the lipid bilayer.
are
are not
none of the above
What is the name of 'A' found on the structure below
Lipid Bilayer (plasma membrane)
Protein
Phosphate hydrophilic heads
Lipid hydrophobic tails
Why would the cell need energy to move molecules across the membrane?
the molecule is going against the concentration gradient
the molecule is to large to pass through the membrane
the lipid membrane requires energy anytime something is moving across the membrane
These types of molecules have an easy time crossing the plasma membrane.
Small, polar, and hydrophilic
Large, polar, and hydrophilic
Small, nonpolar, and hydrophobic
Large, nonpolar, and hydrophobic
These proteins undergo conformational changes for substances to pass.
carrier
channel
pumps
cotransport
Celery Stalks that are placed in fresh water for many hours become turgid. Similar stalks are left in a ).15M salt solution become soft. What can we infer from these results?
Both fresh and salt water are hypertonic to the celery stalks.
Both fresh and salt water are hypotonic to the celery stalks.
Fresh water is hypotonic to the stalks while the salt solution is hypertonic to the stalks.
Fresh water is hypertonic to the stalks while the salt solution is hypotonic to the stalks.
In bacteria phosphate is imported into the cell even when its concentration is high inside the cell. Additionally, phosphate relies on the pH gradient (H+ ions) across the membrane. The outside of the cell must be more acidic than inside the cell. This type of transport is an example of . . .
Passive diffusion
Active transport
Cotransport
Facilitated diffusion
The Na+/K+ pump is called an electrogenic pump because it . . .
Pumps equal quantities of both ions across the membrane.
Pumps H+ ions out of the cell.
Contributes to the membrane potential by increasing the differences in charges across the membrane.
Ionizes Na+ and K+ ions.
Non-specific uptake of extracellular fluid containing dissolved molecules
Exocytosis
Phagocytosis
Diffusion
Pinocytosis
Specific uptake of molecules via solute binding to receptors on the plasma membrane
Receptor mediated exocytosis
Receptor mediated endocytosis
Cotransport
Electrogenic pump
Import for cell to cell recognition
glycolipids
glycolysis and glycoproteins
glycoproteins
glycoproteiins and glycolipids
Cell walls in plant cells provide
shape/structure
protection
Regulation of water intake
All of these
Hole like structure in the cell wall filled with cytosol that connects adjacent cells
Channels
Aquaporins
Gateways
Plasmodesmata
Plant cell walls are made of
chloroplasts
chloropyyll
cellulose
cytosol
________________ is the ability of an extracellular fluid to cause a cell to gain or lose water
water uptake
Tonicity
Pump
Channeling
The ability of cells to regulate their solute concentrations and maintain water balance is called
Diffusion
Osmoregulation
Osmosis
Osmolarity
A physical property that predicts the direction water will flow.
Water potential
Osmosis
Osmoregulation
Membrane potential
white blood cells engulfing invading bacteria is an example of
Phagocytosis
Exocytosis
Pinocytosis
Facilitated Diffusion
