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3630082
INTERNAL STRUCTURES OF PROKARYOTES
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Resumo de Recurso
INTERNAL STRUCTURES OF PROKARYOTES
Ribosomes
structure
made up of dozens of distinct protein
consist of two subunits
large subunit
small subunit
function
sites of protein biosynthesis
process translating mRNA into protein
two subunits bind around the polymers of mRNA
synthesis of protein
translate genetic message of mRNA into protein during DNA translation
Plasmid
characteristics
small
circular
double-stranded DNA
commonly found in bacteria
function
pieces of membrane that can manipulated through the use of restriction
as a basis for bacterial transformation
Nucleoid
meaning
nucleus-like
irregular shape within the cell
called genophore
characteristic
contains DNA
vary in size
DNA strand
individual or pairs
circular or oval
function
contain proteins and enzymes
acts as biological catalysts
primary center for DNA transcription
as a less structured way for prokaryotes
Plasma membrane
definition
composed by two layers of phospholipids
embedded with proteins
phospholipid bilayer
semi-permeable membrane
allow only certain substaince into and out of the cell
Surrounded
cytoplasm
other constituent of the cell
function
separate the contents from outside environment
regulate what enter and out of the cell
base of attachment for the cycloskeleton
gives support and maintain the shape of the cell
Cytoplasm
fluid component inside the plasma membrane
mostly
water
salt
function
contain enzyme
breaking down waste
aid in metabolic activity
gives shape to the cell
place for organelles to expand and grow
transport product ofcellular respiration
act as buffer
Anexos de mídia
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