Organelles
What are tiny structures within the cell that are the sites of protein production?
The tiny structures are called ribosomes.
What does a cell membrane do?
What is the movement of molecules without using energy?
Passive transport
What is osmosis?
When water molecules move from an area of higher concentration to an area of lower concentration.
What polymer is made out of many amino acid monomers?
Protein is made of amino acids.
What is a group of specialized cells that perform a specific function called?
They are called tissue.
What is a cell membrane made up of?
The cell membrane is made of layers of protein within two layers of lipids that have receptor proteins in between them.
What is the difference in the amount of a substance from one location to another?
Concentration gradient
What molecules are moving in osmosis?
Water molecules
Nucleic acids are made up of what monomers?
Nucleotide monomers make up nucleic acids.
What structure is composed mainly of proteins and lipids, and aids in maintaining homeostasis in the cell?
The structure is called the cell membrane.
Name three things that are permitted to enter the cell?
Any three of these: sugars, amino acids, water, fatty acids, oxygen, salts.
What is the movement of molecules from a place of higher concentration to a place of lower concentration?
Diffusion
What direction do the water molecules move in osmosis?
The water molecules move from an area of higher concentration to an area of lower concentration.
Name two types of eukaryotic cells.
Plant cells and animal cells are two types of eukaryotic cells.
What cell organelle carries on aerobic respiration within the cell?
The mitochondria.
What is the purpose of permeability in cells?
Cells are permeable to maintain homeostasis.
What allows the passage of larger molecules through the cell membrane?
and
What is the process called?
Proteins
and
Facilitated diffusion
What is a term used for when a solution in a cell is balanced with the solution in the area surrounding the cell?
Equilibrium
What do a group of similar cells form?
A group of similar cells forms a tissue.
Certain poisons are toxic to organisms because they interfere with the function of enzymes in the mitochondria. This results directly in the inability of the cell to do what?
It results in the inability of the cell to synthesize protein.
Why are protein receptors needed in the cell membrane?
The molecules needed by the cell may be too big to enter it, so protein receptors bind with them to allow them into the cell.
When moving molecules from areas of lower concentration to areas of higher concentration, does it require energy?
and
What is the process called?
Yes
and
Active diffusion
What are the three forms of transport that require no ATP?
Osmosis, facilitated diffusion and diffusion
One characteristic of all living organisms is that they:
a. make food c. maintain homeostasis
b. live on land d. move from place to place
c. maintain homeostasis