cells Flashcards
what are light microscopes
the ability to see greater detail in an image depends on the resolution or resolving power.
calculating magnification
magnification= size of image/real size of object
what is a coverslip for the microscope ?
It protects the microscope and prevents the slide from drying out when it’s being examined.
what are stains used for in the experiment for samples?
uses for contrast, stains are also used to stain specific cell structures or cell products
what are electron microscopes
Electron microscopes use a beam of electrons instead of light rays.
what is cytoplasms function?
A jelly-like material that contains dissolved nutrients
It is where many of the chemical reactions happen.
what is the function of the nucleus?
contains genetic material,
including DNA, which controls the cell’s activities.
what is the function of the cell membrane?
permeable to some substances but not to others. It therefore controls the movement of substances in and out of the cell.
function of mitchondria
contain the enzymes for respiration, and where most energy is released in respiration.
what is the function of ribosomes
Tiny structures where protein synthesis occurs.
what is the function of the permanent vacuole? - plant
Filled with cell sap to help keep the cell turgid
function of cell wall - plant
Made from cellulose fibres and strengthens the cell and supports the plant.
function of chloroplast -plant
has green pigment, chlorophyll, which absorbs light energy for photosynthesis. Contains the enzymes needed for photosynthesis.
