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Ribosomes and Mitochondria
Ribosomes
Ribosomes are small cellular
structures that are the sites
of protein synthesis (or
assembly)
...

Ribosomes location:
They are found in both eukaryotic
and prokaryotic cell
...

Each ribosome has two parts, a
large and a small subunit
...


Notice that:
Ribosomes can be found alone
or in groups within the
cytoplasm
...

Function of Ribosomes:
The ribosomes interact with
other RNA molecules to make
chains of amino acids called
polypeptide chains(why)?

Due to the peptide bond that
forms between individual amino
acids
...

Polypeptide chains that are made
on the rough ER are inserted
directly into the ER and then are
transported to their various
cellular destinations
...


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Mitochondria
Is a membrane-enclosed
organelle that is found in
most eukaryotic cells
...

ATP
Is the cell’s energy source
that is used for such things

such as movement and cell
division
...

The number of
mitochondria in a cell
depends on the cell’s
energy needs
...


Function of Mitochondria:
Mitochondrion has two
phospholipid membranes
...

The inner membrane has
many folds, called cristae
...

Although most of a cell’s
DNA is contained in the cell
nucleus, mitochondria have
their own DNA
...


According to the
endosymbiotic theory,
mitochondria were once
free-living prokaryotes that
infected or were engulfed
by ancient eukaryotic cells
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