Grade 9 Unit 2 Cells and Enzymes
Terms in this set (20)
A thin, flexible barrier around a cell; regulates what enters and leaves the cell
A cell structure that contains nucleic acids, the chemical instructions that direct all the cell's activities.
A jellylike fluid inside the cell in which the organelles are suspended
An organelle found in large numbers in most cells, in which the biochemical processes of respiration and energy production occur.
A rigid structure that surrounds the cell membrane and provides support to the plant cell
An organelle found in plant and algae cells where photosynthesis occurs
Found in Plant cells. Stores water and other substances
Found in the upper layer of leaves. Lots of chloroplasts for photosynthesis
Movement of molecules from an area of higher concentration to an area of lower concentration.
Diffusion of molecules through a semipermeable membrane from a place of higher concentration to a place of lower concentration until the concentration on both sides is equal.
A substance that initiates or accelerates a chemical reaction without itself being affected
A protein that increases the rate of a chemical reaction without being changed by the reaction; a biological catalyst.
Difference in the concentration of a substance from one location to another
Partially permeable membrane
A membrane that is permeable to certain substances, such as water, but is not permeable to other substances.
A group of similar cells that perform the same function.
A liquid substance capable of dissolving other substances
The most favorable point or condition
A change in the shape of a protein (such as an enzyme) that can be caused by changes in temperature or pH (among other things).
Having a greater concentration of solute than another solution
Having a lower concentration of solute than another solution