Cells Flashcards
(13 cards)
Cell Wall (only found the plant cells)
prevents bursting of a plant cell and gives it a fixed shape
Cell Membrane
a selectively permeable barrier which contols exchange between the cell and its environment
Cytoplasm
Site of many of the chemical reactions of life
Nucleus
contols the activities of the cell, contains chromosomes
Chromosome
carries genetic information in the form of DNA
Mitochondria
Site of Energy Production
Permanent vacuole
only found in plant cells
important during exchange of water and minerals and stores various substances including waste products
Chloroplast
only found in plants
where photosynthesis takes place
Name two organelles found in a plant cell but not in an animal cell. What is the importance of these two organelles to a plant cell?
Chloroplasts, site of photosynthesis and Cell wall prevents the bursting of a plant cell and gives it a fixed shape
Distinguish between cell wall and cell membrane
The cell membrane is partially permeable barrier that controls the passage of substances into and out of the cell whereas the cell wall provides support and protection and allows the free passage of water.
What is Diffusion?
Diffusion is the movement of molecules from a region of high concentration of those molecules to a region of low conentration of those molecules. Eg. dye
What is osmosis?
Osmosis is diffusion of water across a selectively permeable membrane.
