cell structure Flashcards
what is a eukaryotic cell
a plant or animal cell that has a cell membrane, cytoplasm and genetic material is enclosed in a nucleus
what is a prokaryotic cell
a cell in which the genetic material is not enclosed in a nucleus, dna found as a loop in the cell, may be one or more plasmids
what js a plasmid
a small ring of dna
what type of cell is a bacterial cell
prokaryotic
what is the size comparison between prokaryotic and eukaryotic cells
prokaryotic is much smaller
nucleus function
control the cell
cytoplasm function
site of chemical reactions
cell membrane function
control what enters and leave
mitochondria function
site of respiration
ribosome function
protien synthesise
chloroplast function
site of photosynthesis
permanent vacuole function
supports the cell and contains sap
how is the cell wall strengthened
cellulose
what foes a plant cell contain that an animal cell doesnt
chloroplasts cell wall and vacuole
sperm cell function
carry fathers genetic information and fertilise the egg
how is the sperm cell adapted
streamlined shape nucleus contains one set of chromosomes lots of mitochondria for respiration contains digestive enzymes
what is the function of a nerve cell
transmit electrical impulses around the body
how is the nerve cell adapted
long and lots of dendrites to make connections with lots of ither cells
muscle cell function
contract and relax to bring about movement
how is muscle cell adapted
lots of mitochondria for respiration
root hair cell function
absorb mineral ions and water from soil
how is root hair cell adaoted
large surface area and lots of mitochondria for respiration
xylem function
transport water around the plant
how are xylem adapted
few cell structures and so they are dead for more space and supported by lignin
phloem function
transport sugar around the plant
how are phloem adapted
few cell structures and supported by companion cells
what are advantages electrin microscopes
higher magnification and higher resolution
what are the benefits of electron microscope
can examine cell on much finer detail and had left better understanding of sub cellular structures
what is magnification formula
magnification =size of image/ size of real object
