Cards Flashcards
Is the movement of materials across the plasma membrane without the use of cell’s energy
Passive transport
The movement of substances across the plasma membrane from a high concentration to an area of low concentration
Diffusion
The diffusion of water molecules through a selectively permeable membrane from an area of high concentration to lower water concentration
Osmosis
Occurs when a carrier molecule embedded in the plasma membrane transports a substance across the membrane by means of diffusion
Facilitated Transport
Is the movement of materials across a cell membrane that requires energy
Active transport
A process in which a cell surrounds and takes in material from its environment
Endocytosis
A process by which materials (waste) exit the cell BOTH REQUIRE ENERGY!!!!
Exocytosis
Enzymes lowers the ____________ needed to start reactions
Activation level
Enzymes make the process __________
Faster
Enzymes only act on ____ substrate and are not permanently altered or used up in reactions
One
Photosynthesis is part of the __________ cycle
Carbon
DNA nucleic acids are made up of smaller subunits called
Nucleotides
Sugar-ribose, bases-Adenine, Uracil, Guanine, and cytosine; single stranded
RNA
Carries the message from nucleus to cytoplasm (ribosome)
mRNA
Carries amino acids to ribosome
tRNA
