Chapter 3 Cellular Level Of Organization Flashcards
________________ are major components of the plasma membrane. They are made of a polar head and a non-polar tail.
A _____________________________ is a molecule with two fatty acids and a modified phosphate group attached to a glycerol backbone.
Protein
DNA
Phospholipid
Phospholipid bilayer
Proteins are one of the least abundant organic molecules in living systems.
True
False
Which of the following is NOT the function of proteins?
Support
Defense
Regulation
Transport
Information storage
Metabolism
Motion
_____________________ is made of a phospholipid bilayer with embedded proteins.
Lipid
Phospholipid
Membrane
Cell membrane
A and B
______________________is a lipid molecule with 2 fatty acid chains and a phosphate-containing group.
_______________________ separates the internal contents of the cell from its surrounding environment.
Lipid
Phospholipid bilayer
Membrane
Cell membrane
____________________ is a passive form of transport of molecules.
Diffusion
Simple diffusion
Osmosis
None of the above
_________________ occurs when a transporter is required to transport a molecule across the cell membrane without spending energy.
Diffusion
Active transport
Facilitated diffusion
Passive and active transport
Choose the factor that does NOT affect the rate of diffusion.
Mass of molecules diffusing
Solubility of the molecule
Concentration gradient
Color of the molecule
__________________ is diffusion of water across the plasma membrane due to concentration differences.
In a ________ solution cell gains water; In an __________________solution cell neither gains or loses water; In a _______________ solution – cell loses water.
Hypotonic; hypertonic; isotonic
Isotonic; hypotonic; hypertonic
Hypotonic; isotonic; hypertonic
Hypertonic; isotonic; hypotonic
______________ is a passive transport of water.
Osmosis
Diffusion
Simple diffusion
Facilitated diffusion
Which solutions are the blood cells in? select the words below:
Isotonic, hypertonic, hypotonic
_______________ is the entire region of a cell between the plasma membrane and the nuclear envelope.
Cytoplasm
Nucleoplasm
Sarcoplasm
None of the above
_________________ are the cellular structures responsible for protein synthesis.
Endoplasmic reticulum
Ribosomes
Nucleus
cytoplasm
_________________ are called the powerhouse of the cell.
Endoplasmic reticulum
Ribosomes
mitochondria
2 important functions of cytoskeletons are:
________________
________________
_________________ houses the cell’s DNA and directs the synthesis of ribosomes and proteins.
Vocabulary
A selectively permeable membrane Diffusion
Concentration Osmosis
Fill in the blanks for the following 8 questions. Words may be used more than once.
refers to the amount of a substance in a given space.
is the movement of particles from an area of higher concentration to an area of lower concentration.
Diffusion
Simple diffusion
Facilitated diffusion
osmosis
allows some materials to pass through it but keeps other materials out.
Membrane
Selective membrane
Plasma membrane
Nuclear membrane
is the diffusion of water molecules through a selectively permeable membrane.
Water diffusion
Osmosis
Simple diffusion
Facilitated diffusion
moves wastes from inside of a cell to outside a cell.
can be compared to a window screen.
happens when water particles move from a place where their concentration is higher to a place where their concentration is lower.
__________________ is diffusion of water across the plasma membrane due to concentration differences.
______________ is a passive transport of water.
_________________ works against concentration (electrochemical) gradients using ATP (energy).
_________________ occurs when large amount of fluid or particles are brought
Large transport
Huge transport
Passive transport
Active transport
Bulk transport
_______________ occurs if the bulk transport carries the molecule into the cell by vacuole formation.
Phagocytosis
Pinocytosis
Exocytosis
Receptor mediated endocytosis
_______________ occurs when vesicles form around a liquid or around very small particles and take it into the cell.
Phagocytosis
Pinocytosis
Exocytosis
Receptor mediated endocytosis
