Plant Cell Structure

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Flashcards by , created about 6 years ago

AS Biology2 (The Variety of Life) Flashcards on Plant Cell Structure, created by sammi_taylor01 on 05/28/2013.

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Created by sammi_taylor01 about 6 years ago
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Question Answer
What type of cells are plant cells? eukaryotic cells?
What's a leaf palisade cells role? carry out photosynthesis
What are the main features of a leaf palisade cell? Long, thin cells form continuous layers for maximum absorption of sunlight. Numerous chloroplasts that can move to be in the best position for absorption. Vacuole pushing chloroplasts to the edge
What are chloroplasts function? carry out photosynthesis
What are the typical shape of chloroplasts and what are their main features? Typically disc-shaped and include the chloroplasts envelope, the grana and the stroma.
Describe the chloroplasts envelope. Double plasma membrane surrounding organelles, it is highly specific on what it allows to enter the cell or not.
Describe the grana. Stacks of up to 100 structures called thylakoids, within this is chlorophyll (photosynthetic pigment). This is where the first stage of photosynthesis takes place.
Describe the stroma. fluid-filled structure that is where the second stage of photosynthesis takes place. Within the stroma are other structures, such as starch grains.
How are the chloroplasts adapted for their function? Large surface area for the attachment of chlorophyll and fluid of the stroma possess enzymes needed for the second stage of photosynthesis.
What do chloroplasts contain? DNA and ribosomes for the easy manufacture of proteins (enzymes) needed for photosynthesis.
Describe the cell wall. Consists of microfibrils of the polysaccharide cellulose embedded in a matrix. This adds to the strenght of the wall.
Cell walls have the following features.. -consist of a number of polysaccharides, -middle lamella marking the boundary between adjacent cells,
The functions of the cellulose cell wall are to: -give mechanical strength to the plant, -provide strength in order for the cell to stop bursting, -allow water to pass along it contributing to the movement of water through a plant.
What are some differences of plant and animal cells? First plant cells.. -cellulose cell wall -vacuole filled with sap -chloroplasts are present -starch grains are used for storage
What are some differences of plant and animal cells? Now animal cells.. -no chloroplasts present -only a cell surface membrane -if vacuoles are present, small and scattered about the cell -glycogen granules used for storage