transmission electron microscope
beam of electrons instead of light sent through a thin layer of the specimen
shows the internal structure
cell membrane functions x2
control what enters and leaves the cell
provides support to the cell
scanning electron microscope
beam of electrons to see the surface view of the specimen
is the cell membrane permeable or semi permeable
semi permeable
what is the cell membrane composed of
phospholipids and proteins
nucleus
controls the centre of the cell
what is the function of nuclear pores
allow some materials to pass in and out
water ? phosphate head
loving
water ? lipid tail
hating
cytoplasm
jelly like substance that suspends cell organelles
what’s the difference between cytosol and cytoplasm
cytosol is the cytoplasm without organelles
ribosomes function
make protein
what do ribosomes consist of
RNA and proteins
cell wall is in only a plant or animal cell
plant
cell wall
provide strength and support
made up of cellulose
is the cell wall permeable or semi permeable
permeable
DNA is found on..
chromosomes
how many chromosomes do humans have
46 (23 pairs)
what is located on chromosomes and what are they
genes are units of inheritance
what type of carbohydrate is cellulose and what structure is made up of cellulose
polysaccharide - cell wall (present in plant cells only)
when chromosomes are not dividing, elongated and interwoven they are
chromatin
chromatin
when chromosomes are not dividing, elongated and interwoven
mitochondria
supplies e nergy to cells
chloroplasts
photosynthesis takes place here