Tatap Muka 3-3 -2-Struktur Sel Eukariot-charis 2014

8/10/2019 Tatap Muka 3-3 -2-Struktur Sel Eukariot-charis 2014

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STRUKTUR SEL EUKARIOT

Tatap muka - 3

[email protected]


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Cytoplasm of Eukaryotes

Membranous Organelles

Nucleus

Endoplasmic reticulum

Golgi body

Lysosomes, peroxisomes, vacuoles, and vesicles

Mitochondria

Chloroplasts


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Lysosomes, Peroxisomes, Vacuoles, and

Vesicles

Store and transfer chemicals within cells

May store nutrients in cell

Lysosomes contain catabolic enzymes

Peroxisomes contain enzymes that degrade

poisonous wastes


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Charis Amarantini Biologi Sel

LISOSOM (lysiscut)

- single membrane, variable size

- membraneous sacs containing a large variety of low pH hydrolytic

enzymes-plants contain the analogous vacuoles


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Lysosomes circular, but bigger than

ribosomes

Garbage disposal of thecell

Contain digestive

enzymes that breakdown wastes

Function: to breakdown food into particlesthe rest of the cell can

use and to destroy oldcells

Nickname: Clean-upCrews

Which organelles do

lysosomes work with?


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Mitochondria

An intracellular organelle.

There are 100 to 1000s of mitochondria/cell.

All mitochondria come from the mother.

Mitochondria have their own DNA.

Found in all cell types, except the RBC.

Major functions of mitochondria:

Makes energy in the form of ATP.

Programmed cell death (apoptosis).


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Mitochondria (mitosthread, chondrosgranule)

evolved from aerobic bacteria

site of cellular respiration (aerobic metabolism)large ellipsoid ~ 2000/eukaryotic cell (~ 1/5 cell)

two lipid membranes

smooth outer & highly folded inner with invaginations called cristae

has two spaces (inner membrane space & matrix internal space)

Interior matrix contains 70S ribosomes and circular molecule of DNA

respiratory enzymes form gel-like matrix of inner membrane

Produce most of cells ATP

couples chemical energy from nutrient oxidation to synthesis

of ATP (energy storage molecule)ATP is exported to rest of cell to fuel processes

contains DNA, RNA and ribosomes for the synthesis of

some mitochondrial components


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Chloroplast

Found only in plant cells

Contains the green pigmentchlorophyll

Site of food (glucose)production

Bound by a doublemembrane

Function: traps energy fromthe sun to produce food forthe plant cell

Tatap Muka 3-3 -2-Struktur Sel Eukariot-charis 2014

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