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Plant Cells

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Soha Oraby

on 18 October 2016

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Transcript of Plant Cells

Nuclear Pore
Is a large protein lined channel that crosses the nuclear envelope also it allows small molecules an ions to freely pass or diffuse into or out of the nucleus.
Nuclear Envelope
It is the outer covering of the nucleus in plant and other eukaryotic cells that acts as a barrier separating the nuclear contents from the surrounding cytoplasm. Its structure is a double membrane system, consisting of two concentric membrane which are separated by a fluid filled space called the perinuclear, cisterna and, it consists of two bilayers made of phospholipids, in which numerous proteins are embedded. Its function is to serve as a physicbarrier by separating the content so the nucleus(DNA) form the Cytoplasm.
The jelly-like fluid that fills a cell is called cytoplasm. It present within the cell membrane of all cell types and contains all organelles and cell plants. It's surrounded by two membrane: The inner and outer membranes.

Functions: Transports genetic material and the products of cellular respiration. It also acts as a liquid medium to suspend organelles and helps cells expand during reproduction.
Endoplasmic Reticulum
It is a network of membranes found throughout the cell and connected to the nucleus.
The membrane are slightly different from cell to cell and a cell's function determines the size and the structure of the ER.
There are two basic types of ER.
Rough (RER)
Smooth ER (SER)
It have the same type of membrane but they have different shapes.
It's a membrane bound cellular structure. It can also be described as the power of the cell.
Structure: Mitochondria are rod shaped structure found in both animal and plant cells. It is a double membrane bound organelle. It has the outer and the membrane. The membranes are made up of phospholipids and proteins.

Function: Produce energy
Helps the cell maintain proper concentration of calcium ions.
Builds certain parts of blood and hormones.
It produces food and it works to convert light into sugar for cells.
Used in the process of photosynthesis where plants create sugars and release oxygen.
The nucleus is the control center of the cell. It contains most of the cell's genetic material, the DNA. It's the largest organelle in the cell, it is a rather dense and spherical organelle. It takes up 10% of the cell's volume. The Nucleus is made up of three parts, the nuclear envelope, nuclear pore and the nucleolus.
Cell Wall
Cell Wall is a protective layer outside the cell membrane that also provides support for the cell's structure.

It gives the plants its actual shape.

Acts as a gate keeper because it determines what can enter or leave the cell in order to keep the cell protected.
Golgi Apparatus:
Flattened disc-like structure
Located near the endoplasmic reticulum
Plant Cells can contain more, yet smaller, Golgi apparatus than animal cells do.
It receives proteins and lipids from the rough endoplasmic reticulum.
It then modifies sorts, and packs these proteins and lipids into sealed droplets called vesicles.
They can be sent to lysosomes, the plasma membrane, and outside the cell.
Golgi Apparatus is a major organelle in eukaryotic cells.
A ribosomes is an internal component of organelles that is responsible in assembling molecules of specific amino acid to form a certain protein molecule.
Ribosomes are also called as the workbenches where in proteins are manufactured.
Function: vital for the production of proteins, or polypeptide chains, form the RNA.
In the eukaryotic cells, the ribosomes structure is model 60_s\ 40_S
It hold enzymes that were created by the cell. The purpose of the lysosome is to digest things. They might be used to digest food or break down the cell when it dies.
It's basically a specialized vesicle that holds a variety of enzymes. Since lysosomes are little digestion machines they go to work when the cell absorbs or eats some food.
They're also in charge of cellular homeostasis, plasma membrane repair, and metabolism.
Cell Membrane Structure
Protecting layer of the cell bounding the protoplasm.
Provides interface for interactions between the outer and the inner components.
Protoplasm is covered by a membrane: the plasma membrane.
All cells have membranes
Presented beneath the cell wall
A plasma membrane or an outer membrane or a cell composed of two layers of phospholipids and embeded with proteins.
A thin semi permeable membrane layer surround the Cytoplasm of the cell.
The cell membrane forms a barrier between the inside of the cell and the environment outside the cell- enclosing cytoplasm and any organelles within the cell, and enabling different chemical environments to exist on each side of the cell membrane.
Plant Cells
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